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Hu S, Habib A, Xiong W, Chen L, Bi L, Wen L. Mass Spectrometry Imaging Techniques: Non-Ambient and Ambient Ionization Approaches. Crit Rev Anal Chem 2024:1-54. [PMID: 38889072 DOI: 10.1080/10408347.2024.2362703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/20/2024]
Abstract
Molecular information can be acquired from sample surfaces in real time using a revolutionary molecular imaging technique called mass spectrometry imaging (MSI). The technique can concurrently provide high spatial resolution information on the spatial distribution and relative proportion of many different compounds. Thus, many scientists have been drawn to the innovative capabilities of the MSI approach, leading to significant focus in various fields during the past few decades. This review describes the sampling protocol, working principle and applications of a few non-ambient and ambient ionization mass spectrometry imaging techniques. The non-ambient techniques include secondary ionization mass spectrometry and matrix-assisted laser desorption ionization, while the ambient techniques include desorption electrospray ionization, laser ablation electrospray ionization, probe electro-spray ionization, desorption atmospheric pressure photo-ionization and femtosecond laser desorption ionization. The review additionally addresses the advantages and disadvantages of ambient and non-ambient MSI techniques in relation to their suitability, particularly for biological samples used in tissue diagnostics. Last but not least, suggestions and conclusions are made regarding the challenges and future prospects of MSI.
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Affiliation(s)
- Shundi Hu
- The Research Institute of Advanced Technologies, Ningbo University, Ningbo, Zhejiang, China
- China Innovation Instrument Co., Ltd, Ningbo, Zhejiang, China
| | - Ahsan Habib
- The Research Institute of Advanced Technologies, Ningbo University, Ningbo, Zhejiang, China
- Department of Chemistry, University of Dhaka, Dhaka, Bangladesh
| | - Wei Xiong
- The Research Institute of Advanced Technologies, Ningbo University, Ningbo, Zhejiang, China
- China Innovation Instrument Co., Ltd, Ningbo, Zhejiang, China
| | - La Chen
- The Research Institute of Advanced Technologies, Ningbo University, Ningbo, Zhejiang, China
- China Innovation Instrument Co., Ltd, Ningbo, Zhejiang, China
| | - Lei Bi
- The Research Institute of Advanced Technologies, Ningbo University, Ningbo, Zhejiang, China
- China Innovation Instrument Co., Ltd, Ningbo, Zhejiang, China
| | - Luhong Wen
- The Research Institute of Advanced Technologies, Ningbo University, Ningbo, Zhejiang, China
- China Innovation Instrument Co., Ltd, Ningbo, Zhejiang, China
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Wilson ID, Poole CF. Planar chromatography - Current practice and future prospects. J Chromatogr B Analyt Technol Biomed Life Sci 2023; 1214:123553. [PMID: 36495686 DOI: 10.1016/j.jchromb.2022.123553] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 11/01/2022] [Accepted: 11/24/2022] [Indexed: 11/29/2022]
Abstract
Planar chromatography, in the form of thin-layer or high-performance thin-layer chromatography (TLC, HPTLC), continues to provide a robust and widely used separation technique. It is unrivaled as a simple and rapid qualitative method for mixture analysis, or for finding bioactive components in mixtures. The format of TLC/HPTLC also provides a unique method for preserving the separation, enabling further investigation of components of interest (including quantification/structure determination) separated in both time and space from the original analysis. The current practice of planar chromatography and areas of development of the technology are reviewed and promising future directions in the use of TLC/HPTLC are outlined.
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Affiliation(s)
- Ian D Wilson
- Division of Systems Medicine, Department of Metabolism, Digestion and Reproduction, Imperial College, Burlington Danes Building, Du Cane Road, London W12 0NN, UK.
| | - Colin F Poole
- Department of Chemistry, Wayne State University, Detroit, MI 48202, USA.
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Xia H, Dai Y, Zhao C, Zhang H, Shi Y, Lou H. Chromatographic and mass spectrometric technologies for chemical analysis of Euodiae fructus: A review. PHYTOCHEMICAL ANALYSIS : PCA 2023; 34:5-29. [PMID: 36442477 DOI: 10.1002/pca.3187] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 10/22/2022] [Accepted: 10/27/2022] [Indexed: 06/16/2023]
Abstract
INTRODUCTION Euodiae fructus, also known as Evodiae fructus, is a popular Chinese herbal medicine derived from the dried, nearly ripe fruits of Tetradium ruticarpum (A. Juss.) T. G. Hartley. The main bioactive constituents of Euodiae fructus are alkaloids, limonoids, flavonoids, and anthraquinones. The contents of these compounds vary greatly between different plant species, geographic locations, and harvest times, which thus affect the therapeutic effects. OBJECTIVES We aimed to summarize the chromatographic and mass spectrometric technologies applied for chemical analysis and quality evaluation of Euodiae fructus. Moreover, we aimed to emphasize the diverse soft ionization techniques and mass analyzers of LC-MS methods for assessment of Euodiae fructus. METHODOLOGY A literature study was carried out by retrieving articles published between January 1988 and December 2021 from well-known databases, including PubMed, ASC, Elsevier, ScienceDirect, J·STAGE, Thieme, Taylor & Francis, Springer Link, Wiley Online Library, and CNKI. The chemical analysis methods were described in several categories in accordance with the used analytical techniques, including thin-layer chromatography (TLC), high-performance liquid chromatography (HPLC), high-performance liquid chromatography-mass spectrometry (HPLC-MS), gas chromatography-mass spectrometry (GC-MS), capillary electrophoresis (CE), and counter-current chromatography (CCC). RESULTS This review systematically summarizes the achievements in chemical analysis and quality evaluation of Euodiae fructus published in over three decades, covering the various chromatographic and mass spectrometric technologies applied for identification and quantification of phytochemical constituents. CONCLUSION The summary serves as an important basis for future phytochemical research and implementation of quality control methods in order to ensure the efficacy and safety of Euodiae fructus.
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Affiliation(s)
- Hongmin Xia
- School of Pharmaceutical Sciences, Shandong University, Jinan, China
- Key Disciplines on Analysis of Traditional Chinese Medicine of SATCM, the Key Unit for Research of Technique and Principle of Honey-Processing and Carbonizing of SATCM, Shandong Key Laboratory of Chinese Medicine Quality Standard Research, Taishan Scholar-Distinguished Experts Position, Shandong Academy of Chinese Medicine, Jinan, China
| | - Yanpeng Dai
- Key Disciplines on Analysis of Traditional Chinese Medicine of SATCM, the Key Unit for Research of Technique and Principle of Honey-Processing and Carbonizing of SATCM, Shandong Key Laboratory of Chinese Medicine Quality Standard Research, Taishan Scholar-Distinguished Experts Position, Shandong Academy of Chinese Medicine, Jinan, China
| | - Chengxin Zhao
- The People's Republic of China Taian Customs, Taian, China
| | - Huimin Zhang
- Key Disciplines on Analysis of Traditional Chinese Medicine of SATCM, the Key Unit for Research of Technique and Principle of Honey-Processing and Carbonizing of SATCM, Shandong Key Laboratory of Chinese Medicine Quality Standard Research, Taishan Scholar-Distinguished Experts Position, Shandong Academy of Chinese Medicine, Jinan, China
| | - Yusheng Shi
- Key Laboratory of Biotechnology and Bioresources Utilization, Educational of Minister, College of Life Science, Dalian Nationalities University, Dalian, China
- National-Local Joint Engineering Research Center for Drug-Research and Development (R&D) of Neurodegenerative Diseases, Dalian Medical University, Dalian, China
- Academy of Integrative Medicine, Dalian Medical University, Dalian, China
| | - Hongxiang Lou
- School of Pharmaceutical Sciences, Shandong University, Jinan, China
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Shiea J, Lin HJ, Bhat SM, Lee CY, Huang MZ, Ponnusamy VK, Cheng SC. Thin layer chromatography/desorption flame-induced atmospheric pressure chemical ionization/mass spectrometry for the analysis of volatile and semi-volatile mixtures. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2022; 36:e9409. [PMID: 36194496 DOI: 10.1002/rcm.9409] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 09/27/2022] [Accepted: 09/29/2022] [Indexed: 06/16/2023]
Abstract
UNLABELLED Flame-induced atmospheric pressure chemical ionization (FAPCI) has been used to directly characterize chemical compounds on a glass rod and drug tablet surfaces. In this study, FAPCI was further applied to interface thin layer chromatography (TLC) and mass spectrometry (MS) for mixture analysis. METHODS A micro-sized oxyacetylene flame was generated using a small concentric tube system. Hot gas flow and primary reactive species from the micro-flame were directed toward a developed TLC gel plate to thermally desorb and ionize analytes on the gel surface. The resulting analyte ions subsequently entered the MS inlet for detection. RESULTS A 1-1.5-mm-wide light-brown line was observed on the TLC plate after the desorption FAPCI/MS (DFAPCI/MS) analysis, revealing that the gel surface withstood a high temperature from the impact of the micro-flame. Volatile and semi-volatile chemical compounds, including amine and amide standards, drugs, and aromatherapy oils, were successfully desorbed, ionized, and detected using this TLC/DFAPCI/MS. The limit of detection of TLC-DFAPCI/MS was determined to be 5 ng/spot for dibenzylamine and ethenzamide. CONCLUSIONS TLC/DFAPCI/MS is one of the simplest TLC-MS interfaces showing the advantages such as low costs and an easy set up. The technique is useful for characterizing thermally stable volatile and semi-volatile compounds in a mixture.
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Affiliation(s)
- Jentaie Shiea
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung, Taiwan
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung, Taiwan
- Rapid Screening Research Center for Toxicology and Biomedicine, National Sun Yat-Sen University, Kaohsiung, Taiwan
- Research Center for Environmental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Hsing-Jung Lin
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung, Taiwan
| | | | - Chi-Yang Lee
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - Min-Zong Huang
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - Vinoth Kumar Ponnusamy
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Sy-Chyi Cheng
- Biotechnology Center in Southern Taiwan, Academia Sinica, Tainan, Taiwan
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei, Taiwan
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Claude E, Lafont R, Plumb RS, Wilson ID. High Performance Reversed-Phase Thin-Layer Chromatography-Desorption Electrospray Ionisation - Time of Flight High Resolution Mass Spectrometric Detection and Imaging (HPTLC/DESI/ToFMS) of Phytoecdysteroids. J Chromatogr B Analyt Technol Biomed Life Sci 2022; 1200:123265. [DOI: 10.1016/j.jchromb.2022.123265] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 04/05/2022] [Accepted: 04/24/2022] [Indexed: 02/04/2023]
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Lu SH, Zhang MC, Zhai HL, Bi KX, Zhao BQ. Rapid Determination in the Quality Control of Chinese Patent Medicine. J Pharm Innov 2022. [DOI: 10.1007/s12247-021-09608-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Wang M, Zhang Y, Wang R, Wang Z, Yang B, Kuang H. An Evolving Technology That Integrates Classical Methods with Continuous Technological Developments: Thin-Layer Chromatography Bioautography. Molecules 2021; 26:4647. [PMID: 34361800 PMCID: PMC8347725 DOI: 10.3390/molecules26154647] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 07/24/2021] [Accepted: 07/27/2021] [Indexed: 12/20/2022] Open
Abstract
Thin-layer chromatography (TLC) bioautography is an evolving technology that integrates the separation and analysis technology of TLC with biological activity detection technology, which has shown a steep rise in popularity over the past few decades. It connects TLC with convenient, economic and intuitive features and bioautography with high levels of sensitivity and specificity. In this study, we discuss the research progress of TLC bioautography and then establish a definite timeline to introduce it. This review summarizes known TLC bioautography types and practical applications for determining antibacterial, antifungal, antitumor and antioxidant compounds and for inhibiting glucosidase, pancreatic lipase, tyrosinase and cholinesterase activity constitutes. Nowadays, especially during the COVID-19 pandemic, it is important to identify original, natural products with anti-COVID potential compounds from Chinese traditional medicine and natural medicinal plants. We also give an account of detection techniques, including in situ and ex situ techniques; even in situ ion sources represent a major reform. Considering the current technical innovations, we propose that the technology will make more progress in TLC plates with higher separation and detection technology with a more portable and extensive scope of application. We believe this technology will be diffusely applied in medicine, biology, agriculture, animal husbandry, garden forestry, environmental management and other fields in the future.
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Affiliation(s)
| | | | | | | | | | - Haixue Kuang
- Key Laboratory of Chinese Materia Medica (Ministry of Education), Heilongjiang University of Chinese Medicine, Harbin 150000, China; (M.W.); (Y.Z.); (R.W.); (Z.W.); (B.Y.)
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Tzeng TRJ, Liu TY, Lin CW, Chang PE, Liao PX, Yang WY, Cheng CY, Liao PC, Chiang WD, Ding ST, Lin YY. Effects of Dietary Inclusion of Dry Hydrastis canadensis on Laying Performance, Egg Quality, Serum Biochemical Parameters and Cecal Microbiota in Laying Hens. Animals (Basel) 2021; 11:ani11051381. [PMID: 34067964 PMCID: PMC8152295 DOI: 10.3390/ani11051381] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 05/10/2021] [Accepted: 05/10/2021] [Indexed: 12/13/2022] Open
Abstract
Simple Summary Extensive studies on alternative sources of feed additives to replace antibiotics are required. Plants of the Ranunculaceae family have been used as medicines or dyes. The representative plant is goldenseal (Hydrastis canadensis), which has a long history of use in North America, with berberine considered the most effective ingredient in goldenseal. Some natural compounds in Hydrastis canadensis function as efflux pump inhibitors and thus may have bactericidal effects against pathogens with antibiotic resistance. However, no conclusive beneficial effects of goldenseal on the livestock industry have been reported. The objective of this study was to examine whether the alternative use of goldenseal roots or leaves has potential health benefits in chickens. Our data demonstrate that Hydrastis canadensis can improve the egg quality and modulate the microbiota composition of laying hens. Abstract Alternative growth promoters are able to not only effectively replace the traditional use of antibiotics but also provide additional health benefits for livestock and reduce food safety concerns. This study investigated the effects of dry Hydrastis canadensis on the laying performance and fecal microbial community of laying hens. Twenty-four Lohmann (LSL, white layer strain) hens were reared from 40 to 48 weeks of age and randomly allotted to four dietary treatments (six birds/treatment). The dietary treatments comprised a basal diet with no treatment as control, a basal diet plus 0.6% powder of dry Hydrastis canadensis roots (R) or leaves (L), and a basal diet plus 0.6% powder of a mixture of dry Hydrastis canadensis roots and leaves (1:1, LR). No mortality was observed in the whole experimental period. The results indicated that albumen height in the LR group was significantly greater than that in the control group. The diet supplemented with Hydrastis canadensis had no significant effects on egg production rate, egg weight, eggshell strength, eggshell thickness, Haugh unit, or yolk height during the whole experimental phase. However, principal coordinate analysis, comparative heat map analysis, and cluster dendrogram analysis of cecal microbiota showed distinct clusters among the groups treated with Hydrastis canadensis and the control group. Regarding blood biochemical parameters, serum cholesterol levels were significantly lower in all Hydrastis canadensis-treated groups compared with those in the control group. Moreover, serum low-density lipoprotein levels were lower in hens supplemented with the leaf of Hydrastis canadensis. The abundances of the phyla Fusobacteria and Kiritimatiellaeota were increased (p < 0.05) in laying hens fed with 0.6% Hydrastis canadensis leaves, whereas the abundance of the phylum Firmicutes in cecum digesta decreased in response to treatment with Hydrastis canadensis roots and leaves. The relative abundance of the Fusobacterium genus was higher in the LR group compared with that in the control. On the contrary, we found a different trend in the Synergistes genus. The potential influences of these microbiota on the performance of laying hens were discussed. The results demonstrate that Hydrastis canadensis can improve the egg albumen height and modulate the cecum digesta microbiota composition of laying hens.
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Affiliation(s)
- Tzuen-Rong J Tzeng
- Department of Biological Sciences, Clemson University, Clemson, SC 29634, USA;
| | - Tzu-Yu Liu
- Department of Animal Science and Biotechnology, Tunghai University, Taichung 407, Taiwan; (T.-Y.L.); (C.-Y.C.)
| | - Chiao-Wei Lin
- Department of Animal Science and Technology, National Taiwan University, Taipei 106, Taiwan; (C.-W.L.); (P.-X.L.); (W.-Y.Y.); (S.-T.D.)
| | - Pei-En Chang
- Institute of Biotechnology, National Taiwan University, Taipei 106, Taiwan;
| | - Pei-Xin Liao
- Department of Animal Science and Technology, National Taiwan University, Taipei 106, Taiwan; (C.-W.L.); (P.-X.L.); (W.-Y.Y.); (S.-T.D.)
| | - Wen-Yuan Yang
- Department of Animal Science and Technology, National Taiwan University, Taipei 106, Taiwan; (C.-W.L.); (P.-X.L.); (W.-Y.Y.); (S.-T.D.)
| | - Chih-Yuan Cheng
- Department of Animal Science and Biotechnology, Tunghai University, Taichung 407, Taiwan; (T.-Y.L.); (C.-Y.C.)
| | - Pei-Chun Liao
- Department of Life Science, National Taiwan Normal University, Taipei 116, Taiwan;
| | - Wen-Dee Chiang
- Department of Food Science, Tunghai University, Taichung 407, Taiwan;
| | - Shih-Torng Ding
- Department of Animal Science and Technology, National Taiwan University, Taipei 106, Taiwan; (C.-W.L.); (P.-X.L.); (W.-Y.Y.); (S.-T.D.)
- Institute of Biotechnology, National Taiwan University, Taipei 106, Taiwan;
| | - Yuan-Yu Lin
- Department of Animal Science and Technology, National Taiwan University, Taipei 106, Taiwan; (C.-W.L.); (P.-X.L.); (W.-Y.Y.); (S.-T.D.)
- Correspondence:
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Dos Santos FF, Nascimento LDS, Cavalcante SFDA, Rezende CM, da Veiga-Junior VF. TLC-ESI-MS as a QuEChERS approach to detection of capsaicin present in different matrices. Nat Prod Res 2021; 36:5342-5346. [PMID: 33960255 DOI: 10.1080/14786419.2021.1922905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Pepper is one of the most consumed spices in the world. Its main compound is capsaicin, a widely studied biomarker that has pharmacological activities due to its anti-inflammatory and analgesic capacity. Topical formulations such as patches based on capsaicin have been developed as an option in relieving pain and reducing swelling. In addition, capsaicin is used as an active ingredient in non-lethal weapon formulations such as pepper spray through the QuEChERS concept (Quick, Easy, Cheap, Effective, Robust, Safe) technique. Used for food analysis, it allows the direct analysis of the biomarker by TLC-ESI-MS, which are previously separated by HPTLC (High Performance Thin Layer Chromatography) using an internal standard for determination of Rf and confirmation of capsaicin in different matrices.
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Affiliation(s)
- Filipe Felisberto Dos Santos
- Chemical Engineering Section, Laboratory of Organic Bioprocesses, Military Engineering Institute (IME), Rio de Janeiro, Brazil
| | - Leandro da Silva Nascimento
- Chemical Engineering Section, Laboratory of Organic Bioprocesses, Military Engineering Institute (IME), Rio de Janeiro, Brazil
| | | | - Claudia Moraes Rezende
- Institute of Chemistry, Laboratory of Aromas, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
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Rapid visualized characterization of phenolic taste compounds in tea extract by high-performance thin-layer chromatography coupled to desorption electrospray ionization mass spectrometry. Food Chem 2021; 355:129555. [PMID: 33831729 DOI: 10.1016/j.foodchem.2021.129555] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 03/02/2021] [Accepted: 03/04/2021] [Indexed: 11/22/2022]
Abstract
Phenolic compounds are the important taste source of tea infusion. In this paper, the phenolic compounds in tea extracts were separated by high-performance thin-layer chromatography (HPTLC), and then in-situ determined by desorption electrospray ionization mass spectrometry (DESI-MS). Total 44 phenolic compounds in tea extracts were accurately confirmed by NIST library as well as reference substances. The clustering results of heat-map can better reflect the differences of phenolic compounds in different categories and subcategories of teas. Besides, the contents of hydrolyzable tannins, including galloylglucose, digalloylglucose, trigalloyglucose and strictinin, were positively correlated with the grades of green tea. The method validation and quantification results of exemplified five phenolic compounds in teas were also obtained, and LODs, LOQs and recoveries were ranging between 1.5-15.9 μg/mL, 5.1-53.1 μg/mL, and 79%-117.6%, respectively. Moreover, HPTLC-DESI-MS can save tenfold analytical time compared to HPLC-MS. Therefore, HPTLC-DESI-MS was a rapid, efficient characterization method of phenolic compounds in tea extracts.
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Beh SY, Md Saleh N, Asman S. Surfactant-functionalised magnetic ferum oxide coupled with high performance liquid chromatography for the extraction of phenol. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:607-619. [PMID: 33480366 DOI: 10.1039/d0ay02166k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The usage of phenols in the marketplace has been increasing tremendously, which has raised concerns about their toxicity and potential effect as emerging pollutants. Phenol's structure has closely bonded phenyl and hydroxy groups, thereby making its functional characteristics closely similar to that of alcohol. As a result, phenol is used as a base compound for commercial home-based products. Hence, a simple and efficient procedure is required to determine the low concentration of phenols in environmental water samples. In this research, a method of combining magnetic nanoparticles (MNPs) with surfactant Sylgard 309 was developed to overcome the drawbacks in the classical extraction methods. In addition, this developed method improved the performance of extraction when MNPs and the surfactant Sylgard 309 were used separately, as reported in the previous research. This MNP-Sylgard 309 was synthesised by the coprecipitation method and attracts phenolic compounds in environmental water samples. Response surface methodology was used to study the parameters and responses in order to obtain an optimised condition using MNP-Sylgard 309. The parameters included the effect of pH, extraction time, and concentration of the analyte. Meanwhile, the responses measured were the peak area of the chromatogram and the percentage recovery. From this study, the results of the optimum conditions for extraction using MNP-Sylgard 309 were pH 7, extraction time of 20 min, and analyte concentration of 10.0 μg mL-1. Under the optimized conditions, MNP-Sylgard 309 showed a low limit of detection of 0.665 μg mL-1 and the limit of quantification was about 2.219 μg mL-1. MNP-Sylgard 309 was successfully applied on environmental water samples such as lake and river water. High recovery (76.23%-110.23%) was obtained.
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Affiliation(s)
- Shiuan Yih Beh
- Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, The National University of Malaysia (UKM), 43600 UKM Bangi, Selangor, Malaysia.
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Conceição RS, Perez CJ, Branco A, Botura MB, Ifa DR. Identification of Sassafras albidum alkaloids by high-performance thin-layer chromatography tandem mass spectrometry and mapping by desorption electrospray ionization mass spectrometry imaging. JOURNAL OF MASS SPECTROMETRY : JMS 2021; 56:e4674. [PMID: 33155339 DOI: 10.1002/jms.4674] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Revised: 10/16/2020] [Accepted: 10/19/2020] [Indexed: 06/11/2023]
Abstract
Sassafras albidum is an important tree species that occurs across North America. The presence of benzylisoquinoline and aporphine alkaloids has been previously described; however, the spatial distribution of these compounds within S. albidum and other plants of Lauraceae family is still unclear. Mass spectrometry imaging has become an important tool in analysis of plants metabolites, uncovering important contributions about the functional role, biosynthetic pathway, and accumulation of these compounds in the plant. This work aimed to identify further alkaloids present in S. albidum roots, twigs, and leaves by high-performance thin-layer chromatography coupled to desorption electrospray ionization multistage mass spectrometry (HPTLC DESI-MSn ) and to map the spatial distribution of these compounds by DESI-MS imaging. A total of 12 alkaloids were indentified in the roots and twigs, and six of them were detected for the first time in S. albidum. A high number of alkaloids was found in S. albidum roots; however, alkaloids were not detected in the leaves. Cross sections of roots and twigs were blotted onto TLC plates assisted by heating and solvent extraction, and these imprints were analyzed by DESI-MS imaging. The profile of alkaloid spatial distribution in DESI-MS images showed different accumulation patterns across and within different plant parts. Most alkaloids displayed higher intensities in the outer-most layer of the roots and twigs. The detailed spatial localization pattern of these alkaloids analyzed by DESI-MS imaging in different plant parts could contribute to a better understanding of the profile of distribution, accumulation, and biosynthesis of benzylisoquinoline and aporphine alkaloids.
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Affiliation(s)
- Rodrigo S Conceição
- Center for Research in Mass Spectrometry, Department of Chemistry, York University, Toronto, Ontario, Canada
- Departament of Health, State University of Feira de Santana, Feira de Santana, Brazil
| | - Consuelo J Perez
- Center for Research in Mass Spectrometry, Department of Chemistry, York University, Toronto, Ontario, Canada
| | - Alexsandro Branco
- Departament of Health, State University of Feira de Santana, Feira de Santana, Brazil
| | - Mariana B Botura
- Departament of Health, State University of Feira de Santana, Feira de Santana, Brazil
| | - Demian R Ifa
- Center for Research in Mass Spectrometry, Department of Chemistry, York University, Toronto, Ontario, Canada
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Conceição RS, Reis IMA, Cerqueira APM, Perez CJ, Junior MCDS, Branco A, Ifa DR, Botura MB. Rapid structural characterisation of benzylisoquinoline and aporphine alkaloids from Ocotea spixiana acaricide extract by HPTLC-DESI-MS n. PHYTOCHEMICAL ANALYSIS : PCA 2020; 31:711-721. [PMID: 32291820 DOI: 10.1002/pca.2935] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 03/14/2020] [Accepted: 03/15/2020] [Indexed: 06/11/2023]
Abstract
INTRODUCTION Lauraceae alkaloids are a structurally diverse class of plant specialised secondary metabolites that play an important role in modern pharmacotherapy, being useful as well as model compounds for the development of synthetic analogues. However, alkaloids characterisation is challenging due to low concentrations, the complexity of plant extracts, and long processes for accurate structural determinations. OBJECTIVE The use of high-performance thin layer chromatography coupled with desorption electrospray ionisation multistage mass spectrometry (HPTLC DESI-MSn ) as a fast tool to identify alkaloids present in Ocotea spixiana extract and evaluate the extract's acaricide activity. METHODS Ocotea spixiana twigs were extracted by conventional liquid-liquid partitioning. HPTLC analysis of the ethyl acetate extract was performed to separate isobaric alkaloids prior to DESI-MSn analysis, performed from MS3 up to MS7 . The extract's acaricide activity against Rhipicephalus microplus was evaluated by in vitro (larval immersion test) and in silico tests. RESULTS HPTLC-DESI-MSn analysis was performed to identify a total of 13 aporphine and four benzylisoquinoline-type alkaloids reported for the first time in O. spixiana. In vitro evaluation of the extract and the alkaloid boldine showed significant activity against R. microplus larvae. It was established in silico that boldine had important intermolecular interactions with R. microplus acetylcholinesterase enzyme. CONCLUSION The present study demonstrated that HPTLC-DESI-MSn is a useful analytical tool to identify isoquinoline alkaloids in plant extracts. The acaricide activity of the O. spixiana ethyl acetate extract can be correlated to the presence of alkaloids.
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Affiliation(s)
- Rodrigo S Conceição
- Department of Health, State University of Feira de Santana, Feira de Santana, Bahia, Brazil
- Centre for Research in Mass Spectrometry, Department of Chemistry, York University, Toronto, Ontario, Canada
| | - Isabella M A Reis
- Department of Health, State University of Feira de Santana, Feira de Santana, Bahia, Brazil
| | - Amanda P M Cerqueira
- Department of Health, State University of Feira de Santana, Feira de Santana, Bahia, Brazil
| | - Consuelo J Perez
- Centre for Research in Mass Spectrometry, Department of Chemistry, York University, Toronto, Ontario, Canada
| | | | - Alexsandro Branco
- Department of Health, State University of Feira de Santana, Feira de Santana, Bahia, Brazil
| | - Demian R Ifa
- Centre for Research in Mass Spectrometry, Department of Chemistry, York University, Toronto, Ontario, Canada
| | - Mariana B Botura
- Department of Health, State University of Feira de Santana, Feira de Santana, Bahia, Brazil
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Mandal SK, Maji AK, Mishra SK, Ishfaq PM, Devkota HP, Silva AS, Das N. Goldenseal (Hydrastis canadensis L.) and its active constituents: A critical review of their efficacy and toxicological issues. Pharmacol Res 2020; 160:105085. [PMID: 32683037 DOI: 10.1016/j.phrs.2020.105085] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Revised: 07/12/2020] [Accepted: 07/14/2020] [Indexed: 12/19/2022]
Abstract
Goldenseal (Hydrastis canadensis L.) is a medicinal plant widely used in various traditional systems of medicine and as a food supplement. It has been traditionally used by Native Americans as a coloring agent and as medicinal remedy for common diseases and conditions like wounds, digestive disorders, ulcers, skin and eye ailments, and cancer. Over the years, goldenseal has become a popular food supplement in the USA and other regions. The rhizome of this plant has been used for the treatment of a variety of diseases including, gastrointestinal disorders, ulcers, muscular debility, nervous prostration, constipation, skin and eye infections, cancer, among others. Berberine is one of the most bioactive alkaloid that has been identified in different parts of goldenseal. The goldenseal extract containing berberine showed numerous therapeutic effects such as antimicrobial, anti-inflammatory, hypolipidemic, hypoglycemic, antioxidant, neuroprotective (anti-Alzheimer's disease), cardioprotective, and gastrointestinal protective. Various research finding suggest the health promoting effects of goldenseal components and their extracts. However, few studies have also suggested the possible neurotoxic, hepatotoxic and phototoxic activities of goldenseal extract and its alkaloids. Thus, large randomized, double-blind clinical studies need to be conducted on goldenseal supplements and their main alkaloids to provide more evidence on the mechanisms responsible for the pharmaceutical activity, clinical efficacy and safety of these products. Thus, it is very important to review the scientific information about goldenseal to understand about the current scenario.
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Affiliation(s)
- Sudip Kumar Mandal
- Dr. B. C. Roy College of Pharmacy and AHS, Durgapur, 713206, West Bengal, India
| | | | - Siddhartha Kumar Mishra
- Cancer Biology Laboratory, Department of Zoology, School of Biological Sciences, Dr. Harisingh Gour Central University, Sagar, 470003, Madhya Pradesh, India
| | - Pir Mohammad Ishfaq
- Cancer Biology Laboratory, Department of Zoology, School of Biological Sciences, Dr. Harisingh Gour Central University, Sagar, 470003, Madhya Pradesh, India
| | - Hari Prasad Devkota
- Department of Instrumental Analysis, Graduate School of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-honmachi, Kumamoto, 862-0973, Japan; Program for Leading Graduate Schools, Health Life Sciences: Interdisciplinary and Glocal Oriented (HIGO) Program, Kumamoto University, 5-1 Oe-honmachi, Kumamoto, 862-0973, Japan
| | - Ana Sanches Silva
- National Institute for Agricultural and Veterinary Research (INIAV), I.P., Rua dos Lagidos, Lugar da Madalena, Vairão, Vila do Conde, 4485-655, Portugal; Center for Study in Animal Science (CECA), ICETA, University of Oporto, Oporto, 4051-401, Portugal
| | - Niranjan Das
- Department of Chemistry, Iswar Chandra Vidyasagar College, Belonia, 799155, Tripura, India.
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Claude E, Tower M, Lafont R, Wilson ID, Plumb RS. High Performance Thin-Layer Chromatography of Plant Ecdysteroids Coupled with Desorption Electrospray Ionisation–Ion Mobility–Time of Flight High Resolution Mass Spectrometry (HPTLC/DESI/IM/ToFMS). Chromatographia 2020. [DOI: 10.1007/s10337-020-03917-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
AbstractThe use of high performance thin-layer chromatography (HPTLC) in combination with high resolution time of flight mass spectrometry (MS) for the detection, identification and imaging (HPTLC/MSI) of ecdysteroids (insect moulting hormones) present in a number of plant extracts obtained from members of the Silene family is demonstrated. DESI is shown to be a convenient method for the recovery of these polar polyhydroxylated steroids from the silica gel of the HPTLC plate for subsequent MS detection and imaging. The incorporation of an ion mobility separation (IMS) to the system to give HPTLC/IMS/MS provided additional drift time data which enabled more confident identification. Using HPTLC/DESI/IMS/MS, a range of ecdysteroids were detected and characterized in extracts of S. otitis, S nutans, S. maritime, S. viridiflora and S. fimbriata.
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Laub A, Sendatzki AK, Palfner G, Wessjohann LA, Schmidt J, Arnold N. HPTLC-DESI-HRMS-Based Profiling of Anthraquinones in Complex Mixtures-A Proof-of-Concept Study Using Crude Extracts of Chilean Mushrooms. Foods 2020; 9:foods9020156. [PMID: 32041163 PMCID: PMC7074031 DOI: 10.3390/foods9020156] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 01/29/2020] [Accepted: 01/30/2020] [Indexed: 01/29/2023] Open
Abstract
High-performance thin-layer chromatography (HPTLC) coupled with negative ion desorption electrospray ionization high-resolution mass spectrometry (DESI-HRMS) was used for the analysis of anthraquinones in complex crude extracts of Chilean dermocyboid Cortinarii. For this proof-of-concept study, the known anthraquinones emodin, physcion, endocrocin, dermolutein, hypericin, and skyrin were identified by their elemental composition. HRMS also allowed the differentiation of the investigated anthraquinones from accompanying compounds with the same nominal mass in the crude extracts. An investigation of the characteristic fragmentation pattern of skyrin in comparison with a reference compound showed, exemplarily, the feasibility of the method for the determination of these coloring, bioactive and chemotaxonomically important marker compounds. Accordingly, we demonstrate that the coupling of HPTLC with DESI-HRMS represents an advanced and efficient technique for the detection of anthraquinones in complex matrices. This analytical approach may be applied in the field of anthraquinone-containing food and plants such as Rheum spp. (rhubarb), Aloe spp., Morinda spp., Cassia spp. and others. Furthermore, the described method can be suitable for the analysis of anthraquinone-based colorants and dyes, which are used in the food, cosmetic, and pharmaceutical industry.
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Affiliation(s)
- Annegret Laub
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany; (A.L.); (A.-K.S.); (L.A.W.); (J.S.)
| | - Ann-Katrin Sendatzki
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany; (A.L.); (A.-K.S.); (L.A.W.); (J.S.)
| | - Götz Palfner
- Departamento de Botanica, Facultad de Ciencias Naturales y Oceanograficas, Universidad de Concepcion, Casilla 160-C, Concepcion, Chile;
| | - Ludger A. Wessjohann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany; (A.L.); (A.-K.S.); (L.A.W.); (J.S.)
| | - Jürgen Schmidt
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany; (A.L.); (A.-K.S.); (L.A.W.); (J.S.)
| | - Norbert Arnold
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany; (A.L.); (A.-K.S.); (L.A.W.); (J.S.)
- Correspondence: ; Tel.: +49-(0)-345-5582-1310
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Fitzgerald M, Heinrich M, Booker A. Medicinal Plant Analysis: A Historical and Regional Discussion of Emergent Complex Techniques. Front Pharmacol 2020; 10:1480. [PMID: 31998121 PMCID: PMC6962180 DOI: 10.3389/fphar.2019.01480] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 11/14/2019] [Indexed: 11/13/2022] Open
Abstract
The analysis of medicinal plants has had a long history, and especially with regard to assessing a plant's quality. The first techniques were organoleptic using the physical senses of taste, smell, and appearance. Then gradually these led on to more advanced instrumental techniques. Though different countries have their own traditional medicines China currently leads the way in terms of the number of publications focused on medicinal plant analysis and number of inclusions in their Pharmacopoeia. The monographs contained within these publications give directions on the type of analysis that should be performed, and for manufacturers, this typically means that they need access to more and more advanced instrumentation. We have seen developments in many areas of analytical analysis and particularly the development of chromatographic and spectroscopic methods and the hyphenation of these techniques. The ability to process data using multivariate analysis software has opened the door to metabolomics giving us greater capacity to understand the many variations of chemical compounds occurring within medicinal plants, allowing us to have greater certainty of not only the quality of the plants and medicines but also of their suitability for clinical research. Refinements in technology have resulted in the ability to analyze and categorize plants effectively and be able to detect contaminants and adulterants occurring at very low levels. However, advances in technology cannot provide us with all the answers we need in order to deliver high-quality herbal medicines and the more traditional techniques of assessing quality remain as important today.
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Affiliation(s)
- Martin Fitzgerald
- Herbal and East Asian Medicine, School of Life Sciences, College of Liberal Arts and Sciences, University of Westminster, London, United Kingdom
| | - Michael Heinrich
- Pharmacognosy and Phytotherapy, UCL School of Pharmacy, London, United Kingdom
| | - Anthony Booker
- Herbal and East Asian Medicine, School of Life Sciences, College of Liberal Arts and Sciences, University of Westminster, London, United Kingdom
- Pharmacognosy and Phytotherapy, UCL School of Pharmacy, London, United Kingdom
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Yousefi-Taemeh M, Ifa DR. Analysis of tetrahydrocannabinol derivative from cannabis-infused chocolate by QuEChERS-thin layer chromatography-desorption electrospray ionization mass spectrometry. JOURNAL OF MASS SPECTROMETRY : JMS 2019; 54:834-842. [PMID: 31498519 DOI: 10.1002/jms.4436] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 08/29/2019] [Accepted: 09/04/2019] [Indexed: 06/10/2023]
Abstract
Recently in Canada and some states of the United States, marijuana (cannabis) has become fully legalized and regulated, for both medical and recreational purposes. This fact is going to make cannabis products such as edibles even more popular than ever before. Therefore, it is assumed that there will be a high demand for analytical methods, which are accurate and sensitive enough to be used in different forensic and pharmaceutical cannabis-related applications. Cannabis derivatives have an extreme range and number of constituents with possible interactions with one another. Thus, this characteristic leads to their vast and highly complex chemistry, which requires robust analytical tools to be able to precisely and accurately quantify and qualify them. We developed and validated an analytical method using desorption electrospray ionization (DESI)-mass spectrometry (MS) to accurately detect, characterize, and quantify cannabinoids and also offer an easy, cost-effective, and reliable technique, which can be performed in a short time for infused edibles in complex matrices such as chocolate. We evaluated a quantitative analysis of tetrahydrocannabinol (THC) in cannabis-infused chocolate with thin-layer chromatography (TLC)-DESI-MS and QuEChERS extraction method. Both techniques of TLC and QuEChERS are cost-effective and can be run in short time.
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Affiliation(s)
- Maryam Yousefi-Taemeh
- Centre for Research in Mass Spectrometry, Department of Chemistry, York University, Toronto, ON, M3J 1P3, Canada
| | - Demian R Ifa
- Centre for Research in Mass Spectrometry, Department of Chemistry, York University, Toronto, ON, M3J 1P3, Canada
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19
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Comparison of high-performance thin-layer with overpressured layer chromatography combined with direct bioautography and direct analysis in real time mass spectrometry for tansy root. J Chromatogr A 2019; 1603:355-360. [DOI: 10.1016/j.chroma.2019.03.068] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 03/29/2019] [Accepted: 03/31/2019] [Indexed: 02/05/2023]
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20
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Fast screening and quantitative mass spectral imaging of thin-layer chromatography plates with flowing atmospheric-pressure afterglow high-resolution mass spectrometry. Anal Bioanal Chem 2019; 411:6213-6225. [DOI: 10.1007/s00216-019-02013-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 06/25/2019] [Accepted: 07/01/2019] [Indexed: 01/21/2023]
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21
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22
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Sakthivel R, Annalakshmi M, Chen SM, Kubendhiran S, Anbazhagan R, Tsai HC. A novel sensitive and reliable electrochemical determination of palmatine based on CeO2/RGO/MWCNT ternary composite. J Taiwan Inst Chem Eng 2019. [DOI: 10.1016/j.jtice.2018.11.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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23
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Simple interface for scanning chemical compounds on developed thin layer chromatography plates using electrospray ionization mass spectrometry. Anal Chim Acta 2019; 1049:1-9. [DOI: 10.1016/j.aca.2018.10.042] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 10/15/2018] [Accepted: 10/19/2018] [Indexed: 11/17/2022]
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24
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Effect-directed analysis via hyphenated high-performance thin-layer chromatography for bioanalytical profiling of sunflower leaves. J Chromatogr A 2018; 1533:213-220. [DOI: 10.1016/j.chroma.2017.12.034] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Revised: 12/12/2017] [Accepted: 12/12/2017] [Indexed: 11/24/2022]
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25
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Liu X, Ahlgren S, Korthout HAAJ, Salomé-Abarca LF, Bayona LM, Verpoorte R, Choi YH. Broad range chemical profiling of natural deep eutectic solvent extracts using a high performance thin layer chromatography-based method. J Chromatogr A 2017; 1532:198-207. [PMID: 29229334 DOI: 10.1016/j.chroma.2017.12.009] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 12/03/2017] [Accepted: 12/04/2017] [Indexed: 01/09/2023]
Abstract
Natural deep eutectic solvents (NADES) made mainly with abundant primary metabolites are being increasingly applied in green chemistry. The advantages of NADES as green solvents have led to their use in novel green products for the food, cosmetics and pharma markets. However, one of the main difficulties encountered in the development of novel products and their quality control arises from their low vapour pressure and high viscosity. These features create the need for the development of new analytical methods suited to this type of sample. In this study, such a method was developed and applied to analyse the efficiency of a diverse set of NADES for the extraction of compounds of interest from two model plants, Ginkgo biloba and Panax ginseng. The method uses high-performance thin-layer chromatography (HPTLC) coupled with multivariate data analysis (MVDA). It was successfully applied to the comparative quali- and quantitative analysis of very chemically diverse metabolites (e.g., phenolics, terpenoids, phenolic acids and saponins) that are present in the extracts obtained from the plants using six different NADES. The composition of each NADES was a combination of two or three compounds mixed in defined molar ratios; malic acid-choline chloride (1:1), malic acid-glucose (1:1), choline chloride-glucose (5:2), malic acid-proline (1:1), glucose-fructose-sucrose (1:1:1) and glycerol-proline-sucrose (9:4:1). Of these mixtures, malic acid-choline chloride (1:1) and glycerol-proline-sucrose (1:1:1) for G. biloba leaves, and malic acid-choline chloride (1:1) and malic acid-glucose (1:1) for P. ginseng leaves and stems showed the highest yields of the target compounds. Interestingly, none of the NADES extracted ginkgolic acids as much as the conventional organic solvents. As these compounds are considered to be toxic, the fact that these NADES produce virtually ginkgolic acid-free extracts is extremely useful. The effect of adding different volumes of water to the most efficient NADES was also evaluated and the results revealed that there is a great influence exerted by the water content, with maximum yields of ginkgolides, phenolics and ginsenosides being obtained with approximately 20% water (w/w).
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Affiliation(s)
- Xiaojie Liu
- Natural Products Laboratory, Institute of Biology, Leiden University, 2333 BE Leiden, The Netherlands
| | - Samantha Ahlgren
- Natural Products Laboratory, Institute of Biology, Leiden University, 2333 BE Leiden, The Netherlands; Division of Pharmacognosy, Faculty of Pharmacy, Uppsala University, 751 05 Uppsala, Sweden
| | | | - Luis F Salomé-Abarca
- Natural Products Laboratory, Institute of Biology, Leiden University, 2333 BE Leiden, The Netherlands
| | - Lina M Bayona
- Natural Products Laboratory, Institute of Biology, Leiden University, 2333 BE Leiden, The Netherlands
| | - Robert Verpoorte
- Natural Products Laboratory, Institute of Biology, Leiden University, 2333 BE Leiden, The Netherlands
| | - Young Hae Choi
- Natural Products Laboratory, Institute of Biology, Leiden University, 2333 BE Leiden, The Netherlands; College of Pharmacy, Kyung Hee University, 02447 Seoul, Republic of Korea.
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Ferey J, Da Silva D, Lafite P, Daniellou R, Maunit B. TLC-UV hyphenated with MALDI-TOFMS for the screening of invertase substrates in plant extracts. Talanta 2017; 170:419-424. [DOI: 10.1016/j.talanta.2017.04.040] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Revised: 04/13/2017] [Accepted: 04/16/2017] [Indexed: 10/19/2022]
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Honarvar E, Venter AR. Ammonium Bicarbonate Addition Improves the Detection of Proteins by Desorption Electrospray Ionization Mass Spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2017; 28:1109-1117. [PMID: 28315234 DOI: 10.1007/s13361-017-1628-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2016] [Revised: 01/26/2017] [Accepted: 02/09/2017] [Indexed: 05/11/2023]
Abstract
The analysis of protein by desorption electrospray ionization mass spectrometry (DESI-MS) is considered impractical due to a mass-dependent loss in sensitivity with increase in protein molecular weights. With the addition of ammonium bicarbonate to the DESI-MS analysis the sensitivity towards proteins by DESI was improved. The signal to noise ratio (S/N) improvement for a variety of proteins increased between 2- to 3-fold relative to solvent systems containing formic acid and more than seven times relative to aqueous methanol spray solvents. Three methods for ammonium bicarbonate addition during DESI-MS were investigated. The additive delivered improvements in S/N whether it was mixed with the analyte prior to sample deposition, applied over pre-prepared samples, or simply added to the desorption spray solvent. The improvement correlated well with protein pI but not with protein size. Other ammonium or bicarbonate salts did not produce similar improvements in S/N, nor was this improvement in S/N observed for ESI of the same samples. As was previously described for ESI, DESI also caused extensive protein unfolding upon the addition of ammonium bicarbonate. Graphical Abstract ᅟ.
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Affiliation(s)
- Elahe Honarvar
- Department of Chemistry, Western Michigan University, Kalamazoo, MI, 49008-5413, USA
| | - Andre R Venter
- Department of Chemistry, Western Michigan University, Kalamazoo, MI, 49008-5413, USA.
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28
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Yang Y, Deng J. Analysis of pharmaceutical products and herbal medicines using ambient mass spectrometry. Trends Analyt Chem 2016. [DOI: 10.1016/j.trac.2016.04.011] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Hemalatha RG, Ganayee MA, Pradeep T. Electrospun Nanofiber Mats as “Smart Surfaces” for Desorption Electrospray Ionization Mass Spectrometry (DESI MS)-Based Analysis and Imprint Imaging. Anal Chem 2016; 88:5710-7. [DOI: 10.1021/acs.analchem.5b04520] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- R. G. Hemalatha
- DST Unit
on Nanoscience and
Thematic Unit of Excellence, Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India
| | - Mohd Azhardin Ganayee
- DST Unit
on Nanoscience and
Thematic Unit of Excellence, Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India
| | - T. Pradeep
- DST Unit
on Nanoscience and
Thematic Unit of Excellence, Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India
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Flowing atmospheric pressure afterglow combined with laser ablation for direct analysis of compounds separated by thin-layer chromatography. Anal Bioanal Chem 2015; 408:815-23. [PMID: 26563110 PMCID: PMC4709388 DOI: 10.1007/s00216-015-9165-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Revised: 10/26/2015] [Accepted: 10/29/2015] [Indexed: 11/06/2022]
Abstract
A thin-layer chromatography-mass spectrometry (TLC-MS) setup for characterization of low molecular weight compounds separated on standard TLC plates has been constructed. This new approach successfully combines TLC separation, laser ablation, and ionization using flowing atmospheric pressure afterglow (FAPA) source. For the laser ablation, a low-priced 445-nm continuous-wave diode laser pointer, with a power of 1 W, was used. The combination of the simple, low-budget laser pointer and the FAPA ion source has made this experimental arrangement broadly available, also for small laboratories. The approach was successfully applied for the characterization of low molecular weight compounds separated on TLC plates, such as a mixture of pyrazole derivatives, alkaloids (nicotine and sparteine), and an extract from a drug tablet consisting of paracetamol, propyphenazone, and caffeine. The laser pointer used was capable of ablating organic compounds without the need of application of any additional substances (matrices, staining, etc.) on the TLC spots. The detection limit of the proposed method was estimated to be 35 ng/cm2 of a pyrazole derivative. Schematic illustration of new TLC-FAPA setup with diode laser ablation ![]()
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Handberg E, Chingin K, Wang N, Dai X, Chen H. Mass spectrometry imaging for visualizing organic analytes in food. MASS SPECTROMETRY REVIEWS 2015; 34:641-58. [PMID: 24687728 DOI: 10.1002/mas.21424] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Revised: 02/18/2014] [Accepted: 02/18/2014] [Indexed: 05/27/2023]
Abstract
The demand for rapid chemical imaging of food products steadily increases. Mass spectrometry (MS) is featured by excellent molecular specificity of analysis and is, therefore, a very attractive method for chemical profiling. MS for food imaging has increased significantly over the past decade, aided by the emergence of various ambient ionization techniques that allow direct and rapid analysis in ambient environment. In this article, the current status of food imaging with MSI is reviewed. The described approaches include matrix-assisted laser desorption/ionization (MALDI), but emphasize desorption atmospheric pressure photoionization (DAPPI), electrospray-assisted laser desorption/ionization (ELDI), probe electrospray ionization (PESI), surface desorption atmospheric pressure chemical ionization (SDAPCI), and laser ablation flowing atmospheric pressure afterglow (LA-FAPA). The methods are compared with regard to spatial resolution; analysis speed and time; limit of detection; and technical aspects. The performance of each method is illustrated with the description of a related application. Specific requirements in food imaging are discussed.
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Affiliation(s)
- Eric Handberg
- Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, Department of Applied Chemistry, East China Institute of Technology, Nanchang, 330013, P.R. China
| | - Konstantin Chingin
- Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, Department of Applied Chemistry, East China Institute of Technology, Nanchang, 330013, P.R. China
| | - Nannan Wang
- Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, Department of Applied Chemistry, East China Institute of Technology, Nanchang, 330013, P.R. China
| | - Ximo Dai
- Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, Department of Applied Chemistry, East China Institute of Technology, Nanchang, 330013, P.R. China
| | - Huanwen Chen
- Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, Department of Applied Chemistry, East China Institute of Technology, Nanchang, 330013, P.R. China
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Hu B, Xin GZ, So PK, Yao ZP. Thin layer chromatography coupled with electrospray ionization mass spectrometry for direct analysis of raw samples. J Chromatogr A 2015; 1415:155-60. [DOI: 10.1016/j.chroma.2015.08.055] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2015] [Revised: 08/23/2015] [Accepted: 08/24/2015] [Indexed: 01/05/2023]
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Iftikhar I, Brajter-Toth A. Solution or Gas Phase? Oxidation and Radical Formation in Electrospray Ionization Mass Spectrometry (ESI MS). ELECTROANAL 2015. [DOI: 10.1002/elan.201500297] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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34
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Mirabelli MF, Coviello G, Volmer DA. Determining fatty acids by desorption/ionization mass spectrometry using thin-layer chromatography substrates. Anal Bioanal Chem 2015; 407:4513-22. [DOI: 10.1007/s00216-015-8630-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Revised: 03/09/2015] [Accepted: 03/10/2015] [Indexed: 11/25/2022]
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35
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Identification and semi-quantitative determination of anti-oxidants in lubricants employing thin-layer chromatography-spray mass spectrometry. J Chromatogr A 2015; 1383:169-74. [DOI: 10.1016/j.chroma.2015.01.048] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Revised: 01/14/2015] [Accepted: 01/14/2015] [Indexed: 12/21/2022]
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36
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Direct analysis of ethylenediaminetetraacetic acid (EDTA) on concrete by reactive-desorption electrospray ionization mass spectrometry. Talanta 2015; 132:877-83. [DOI: 10.1016/j.talanta.2014.10.031] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Revised: 10/10/2014] [Accepted: 10/14/2014] [Indexed: 11/19/2022]
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Bala M, Verma PK, Awasthi S, Kumar N, Lal B, Singh B. Chemical Prospection of Important Ayurvedic Plant Tinospora cordifolia by UPLC-DAD-ESI-QTOF-MS/MS and NMR. Nat Prod Commun 2015. [DOI: 10.1177/1934578x1501000113] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A rapid, sensitive, and accurate ultra-performance liquid chromatography coupled with mass spectrometric method (UPLC-MS) was developed and validated for simultaneous determination of four bioactive compounds, syringin (3), cordifolioside A (4), magnoflorine (6) and tinocordiside (10) in the stem of Tinospora cordifolia. The analysis was performed using an Acquity C18 column and gradient elution of 0.05% formic acid in water and acetonitrile at a detection wavelength of 267 nm in 5 min. A high correlation coefficient (r2 > 0.998) indicated good correlation between investigated compounds concentration and their peak area within the test ranges. The LODs for compounds 3, 4, 6 and 10 were 1.95, 0.97, 3.90 and 0.97 ng/mL, respectively, and LOQs were 6.64, 3.20, 12.87 and 3.20 ng/mL, respectively. The overall intra- and inter-day variations of the four compounds were less than 1%. The variation of these four bioactive compounds in T. cordifolia hosted on fifteen different trees was also determined. The compounds (3, 4, 6 and 10) were found in high amount in the T. cordifolia hosted on Azadirachta indica and Mangifera indica as compared with other plants. Twelve compounds were identified on the basis of their mass and UV-vis spectra. The NMR fingerprinting of the extract revealed the presence of alkaloids, fatty acid methyl esters, polysaccharides and marker components of T. cordifolia.
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Affiliation(s)
- Manju Bala
- Academy of Scientific and Innovative Research, India
- Natural Product Chemistry & Process Development Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, Himachal Pradesh-176061, India
| | - Praveen Kumar Verma
- Academy of Scientific and Innovative Research, India
- Natural Product Chemistry & Process Development Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, Himachal Pradesh-176061, India
| | - Shiv Awasthi
- Natural Product Chemistry & Process Development Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, Himachal Pradesh-176061, India
| | - Neeraj Kumar
- Natural Product Chemistry & Process Development Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, Himachal Pradesh-176061, India
| | - Brij Lal
- Biodiversity Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, Himachal Pradesh-176061, India
| | - Bikram Singh
- Academy of Scientific and Innovative Research, India
- Natural Product Chemistry & Process Development Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, Himachal Pradesh-176061, India
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38
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Guo Z, Cai R, Su H, Li Y. Alkaloids in Processed Rhizoma Corydalis and Crude Rhizoma Corydalis Analyzed by GC/MS. JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY 2014; 2014:281342. [PMID: 25210643 PMCID: PMC4158457 DOI: 10.1155/2014/281342] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2014] [Accepted: 08/02/2014] [Indexed: 05/29/2023]
Abstract
The alkaloids in the processed Rhizoma Corydalis and the crude Rhizoma Corydalis were qualitatively and semiquantitatively analyzed using gas chromatography-mass spectrometry (GC/MS) method. The processing herb drug procedure was carried out according to the standard method of Chinese Pharmacopoeia. The samples were extracted using Soxhlet extractor with different solvents: methanol and acetone. The extraction effect on different solvents was investigated. The results showed that 11 kinds of alkaloids were identified from the crude Rhizoma Corydalis and only two were from the processed Rhizoma Corydalis. A total of 13 kinds of alkaloids were all based on two backbones. The alkaloids in the processed sample were less than those in the crude Rhizoma Corydalis significantly, while almost the corydaline has been changed in conformation after the sample had undergone processing, which provided support for the conclusion of reducing toxicity when the herbal medicine having been undergone a traditional drugs treatment process.
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Affiliation(s)
- Zhifeng Guo
- Key Laboratory of Medical Chemistry and Molecular Diagnosis, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China
| | - Ru Cai
- Key Laboratory of Medical Chemistry and Molecular Diagnosis, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China
| | - Huidan Su
- Key Laboratory of Medical Chemistry and Molecular Diagnosis, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China
| | - Yunlong Li
- Key Laboratory of Medical Chemistry and Molecular Diagnosis, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China
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Hou Y, Wu T, Liu Y, Wang H, Chen Y, Chen B, Sun W. Direct analysis of quaternary alkaloids by in situ reactive desorption corona beam ionization MS. Analyst 2014; 139:5185-91. [PMID: 25118336 DOI: 10.1039/c4an00704b] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The direct detection of quaternary alkaloids by atmospheric pressure chemical ionization (APCI)-base ambient MS is difficult because of their poor volatility. In this study, a reactive protocol was developed for the in situ determination of quaternary alkaloids using desorption corona beam ionization (DCBI) mass spectrometry (MS). The model compounds of 8 quaternary alkaloids including sanguinarine, chelerythrine, cyclanoline, nitidine, coptisine, jatrorrhizine, berberine, palmatine and 2 tertiary alkaloids including protopine and allocryptopine were investigated in different states such as on a polytetrafluoroethylene (PTFE) plate, in raw herbal materials, and in silica gel. After various reactive reagents were studied, the mixture of saturated aqueous NaOH solution and CH3OH solvent (3 : 7, v/v) was selected as the optimized reactive reagent for the reactive DCBI-MS detection. All the target molecules can be detected with high sensitivity. On a PTFE plate the limits of detection were 0.0795, 0.1060, 0.4860, 0.9665, 0.8879, 0.3987, 0.5557, 0.4591, 0.0889, and 0.1929 mg L(-1) for sanguinarine, chelerythrine, cyclanoline, nitidine, coptisine, jatrorrhizine, berberine, palmatine, protopine, and allocryptopine, respectively. The reactive protocol was also applied to the direct detection of raw herbal materials and thin layer chromatography successfully.
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Affiliation(s)
- Yulan Hou
- Key Laboratory of Phytochemical R&D of Hunan Province, Hunan Normal University, Changsha 410081, China.
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40
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Yang Y, Deng J. Internal standard mass spectrum fingerprint: A novel strategy for rapid assessing the quality of Shuang-Huang-Lian oral liquid using wooden-tip electrospray ionization mass spectrometry. Anal Chim Acta 2014; 837:83-92. [DOI: 10.1016/j.aca.2014.06.005] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Revised: 06/01/2014] [Accepted: 06/03/2014] [Indexed: 12/13/2022]
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41
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Faber H, Vogel M, Karst U. Electrochemistry/mass spectrometry as a tool in metabolism studies—A review. Anal Chim Acta 2014; 834:9-21. [DOI: 10.1016/j.aca.2014.05.017] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2014] [Revised: 04/28/2014] [Accepted: 05/12/2014] [Indexed: 10/25/2022]
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42
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Li A, Luo Q, Park SJ, Cooks RG. Synthesis and Catalytic Reactions of Nanoparticles formed by Electrospray Ionization of Coinage Metals. Angew Chem Int Ed Engl 2014; 53:3147-50. [DOI: 10.1002/anie.201309193] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2013] [Revised: 12/12/2013] [Indexed: 01/12/2023]
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43
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Li A, Luo Q, Park SJ, Cooks RG. Synthesis and Catalytic Reactions of Nanoparticles formed by Electrospray Ionization of Coinage Metals. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201309193] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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44
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Himmelsbach M, Waser M, Klampfl CW. Thin layer chromatography–spray mass spectrometry: a method for easy identification of synthesis products and UV filters from TLC aluminum foils. Anal Bioanal Chem 2014; 406:3647-56. [DOI: 10.1007/s00216-014-7639-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2013] [Revised: 01/15/2014] [Accepted: 01/20/2014] [Indexed: 01/09/2023]
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45
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Looi DW, Iftikhar I, Brajter-Toth A. Electrochemical Attributes of Electrochemistry in Tandem with Electrospray Mass Spectrometry. ELECTROANAL 2014. [DOI: 10.1002/elan.201300426] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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46
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Le PM, McCooeye M, Windust A. Application of UPLC-QTOF-MS in MSE mode for the rapid and precise identification of alkaloids in goldenseal (Hydrastis canadensis). Anal Bioanal Chem 2014; 406:1739-49. [DOI: 10.1007/s00216-013-7558-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Revised: 11/12/2013] [Accepted: 12/05/2013] [Indexed: 11/25/2022]
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47
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Plattner S, Erb R, Chervet JP, Oberacher H. Studying the reducing potencies of antioxidants with the electrochemistry inherently present in electrospray ionization-mass spectrometry. Anal Bioanal Chem 2014; 406:213-24. [PMID: 24202195 PMCID: PMC3877428 DOI: 10.1007/s00216-013-7445-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2013] [Revised: 10/14/2013] [Accepted: 10/16/2013] [Indexed: 02/01/2023]
Abstract
In this proof-of-principle study, the applicability of electrospray ionization-mass spectrometry (ESI-MS) to characterize the reducing potencies of natural antioxidants is demonstrated. The ESI source represents a controlled-current electrochemical cell. The interfacial potential at the emitter electrode will be at or near the electrochemical potential of those reactions that sufficiently supply all the required current for the ESI circuit. Indicator molecules prone to oxidation in ESI such as amodiaquine were used to visualize the impact of reducing compounds on the interfacial potential. The extent of inhibition of the oxidation of the indicator molecule was found to be dependent on the kind and amount of antioxidant added. Concentration-inhibition curves were constructed and used to compare reducing potencies and to rank antioxidants. This ranking was found to be dependent on the electrode material-indicator molecule combination applied. For fast and automated characterization of the reducing potencies of electrochemically active molecules, a flow-injection system was combined with ESI-MS. Liquid chromatography was used to process complex biological samples, such as red and white wine. Due to their high content of different polyphenols, red wine fractions were found to exhibit higher reducing potencies than the corresponding white wine fractions. Furthermore, for 14 important natural antioxidants, the results obtained with the controlled-current EC-ESI-MS assay were compared to those obtained with chemical antioxidant assays. Irrespectively of the kind of assay used to test the reducing potency, gallic acid, quercetin, and epicatechin were found to be potent reductants. Other antioxidants performed well in one particular assay only. This observation suggests that different kinds of redox and antioxidant chemistry were assessed with each of the assays applied. Therefore, several assays should be used to comprehensively study antioxidants and their reducing potencies.
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Affiliation(s)
- Sabine Plattner
- Institute of Legal Medicine and Core Facility Metabolomics, Innsbruck Medical University, Müllerstraße 44, 6020 Innsbruck, Austria
| | - Robert Erb
- Institute of Legal Medicine and Core Facility Metabolomics, Innsbruck Medical University, Müllerstraße 44, 6020 Innsbruck, Austria
| | | | - Herbert Oberacher
- Institute of Legal Medicine and Core Facility Metabolomics, Innsbruck Medical University, Müllerstraße 44, 6020 Innsbruck, Austria
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48
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Venter AR, Douglass KA, Shelley JT, Hasman G, Honarvar E. Mechanisms of real-time, proximal sample processing during ambient ionization mass spectrometry. Anal Chem 2013; 86:233-49. [PMID: 24308499 DOI: 10.1021/ac4038569] [Citation(s) in RCA: 104] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Andre R Venter
- Department of Chemistry, Western Michigan University , Kalamazoo, Michigan 49008-5413, United States
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49
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Wei Z, Han S, Gong X, Zhao Y, Yang C, Zhang S, Zhang X. Rapid Removal of Matrices from Small-Volume Samples by Step-Voltage Nanoelectrospray. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201302870] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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50
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Wei Z, Han S, Gong X, Zhao Y, Yang C, Zhang S, Zhang X. Rapid Removal of Matrices from Small-Volume Samples by Step-Voltage Nanoelectrospray. Angew Chem Int Ed Engl 2013; 52:11025-8. [DOI: 10.1002/anie.201302870] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2013] [Revised: 06/23/2013] [Indexed: 12/23/2022]
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