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Wabnitz C, Canavan A, Chen W, Reisbeck M, Bakkour R. Quartz Crystal Microbalance as a Holistic Detector for Quantifying Complex Organic Matrices during Liquid Chromatography: 1. Coupling, Characterization, and Validation. Anal Chem 2024; 96:7429-7435. [PMID: 38683884 PMCID: PMC11099895 DOI: 10.1021/acs.analchem.3c05440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
A matrix in highly complex samples can cause adverse effects on the trace analysis of targeted organic compounds. A suitable separation of the target analyte(s) and matrix before the instrumental analysis is often a vital step for which chromatographic cleanup methods remain one of the most frequently used strategies, particularly high-performance liquid chromatography (HPLC). The lack of a simple real-time detection technique that can quantify the entirety of the matrix during this step, especially with gradient solvents, renders optimization of the cleanup challenging. This paper, along with a companion one, explores the possibilities and limitations of quartz crystal microbalance (QCM) dry-mass sensing for quantifying complex organic matrices during gradient HPLC. To this end, this work coupled a QCM and a microfluidic spray dryer with a commercial HPLC system using a flow splitter and developed a calibration and data processing strategy. The system was characterized in terms of detection and quantification limits, with LOD = 4.3-15 mg/L and LOQ = 16-52 mg/L, respectively, for different eluent compositions. Validation of natural organic matter in an environmental sample against offline total organic carbon analysis confirmed the approach's feasibility, with an absolute recovery of 103 ± 10%. Our findings suggest that QCM dry-mass sensing could serve as a valuable tool for analysts routinely employing HPLC cleanup methods, offering potential benefits across various analytical fields.
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Affiliation(s)
- Christopher Wabnitz
- TUM School of Natural Sciences, Chair of Analytical Chemistry and Water Chemistry, Technical University of Munich, Garching 85748, Germany
| | - Aoife Canavan
- TUM School of Natural Sciences, Chair of Analytical Chemistry and Water Chemistry, Technical University of Munich, Garching 85748, Germany
| | - Wei Chen
- TUM School of Natural Sciences, Chair of Analytical Chemistry and Water Chemistry, Technical University of Munich, Garching 85748, Germany
| | - Mathias Reisbeck
- TUM School of Computation, Information and Technology, Heinz Nixdorf Chair of Biomedical Electronics, Technical University of Munich, Munich 81675, Germany
| | - Rani Bakkour
- TUM School of Natural Sciences, Chair of Analytical Chemistry and Water Chemistry, Technical University of Munich, Garching 85748, Germany
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Wabnitz C, Chen W, Elsner M, Bakkour R. Quartz Crystal Microbalance as a Holistic Detector for Quantifying Complex Organic Matrices during Liquid Chromatography: 2. Compound-Specific Isotope Analysis. Anal Chem 2024; 96:7436-7443. [PMID: 38700939 PMCID: PMC11099894 DOI: 10.1021/acs.analchem.3c05441] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 03/22/2024] [Accepted: 04/17/2024] [Indexed: 05/05/2024]
Abstract
In carbon-compound-specific isotope analysis (carbon CSIA) of environmental micropollutants, purification of samples is often required to guarantee accurate measurements of a target compound. A companion paper has brought forward an innovative approach to couple a quartz crystal microbalance (QCM) with high-performance liquid chromatography (HPLC) for the online quantification of matrices during a gradient HPLC purification. This work investigates the benefit for isotope analysis of polar micropollutants typically present in environmental samples. Here, we studied the impact of the natural organic matter (NOM) on the isotopic integrity of model analytes and the suitability of the NOM-to-analyte ratio as a proxy for the sample purity. We further investigated limitations and enhancement of HPLC purification using QCM on C18 and C8 phases for single and multiple targets. Strong isotopic shifts of up to 3.3% toward the isotopic signature of NOM were observed for samples with an NOM-to-analyte ratio ≥10. Thanks to QCM, optimization of matrix removal of up to 99.8% of NOM was possible for late-eluting compounds. The efficiency of HPLC purification deteriorated when aiming for simultaneous purification of two or three compounds, leading to up to 2.5% less NOM removal. Our results suggest that one optimized HPLC purification can be achieved through systematic screening of 3 to 5 different gradients, thereby leading to a shift of the boundaries of accurate carbon CSIA by up to 2 orders of magnitude toward lower micropollutant concentrations.
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Affiliation(s)
- Christopher Wabnitz
- Department of Chemistry, Chair of Analytical
Chemistry and Water Chemistry, TUM School of Natural Sciences, Technical University of Munich, Lichtenbergstr. 4, 85748 Garching, Germany
| | - Wei Chen
- Department of Chemistry, Chair of Analytical
Chemistry and Water Chemistry, TUM School of Natural Sciences, Technical University of Munich, Lichtenbergstr. 4, 85748 Garching, Germany
| | - Martin Elsner
- Department of Chemistry, Chair of Analytical
Chemistry and Water Chemistry, TUM School of Natural Sciences, Technical University of Munich, Lichtenbergstr. 4, 85748 Garching, Germany
| | - Rani Bakkour
- Department of Chemistry, Chair of Analytical
Chemistry and Water Chemistry, TUM School of Natural Sciences, Technical University of Munich, Lichtenbergstr. 4, 85748 Garching, Germany
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Fekete S, Doneanu C, Addepalli B, Gaye M, Nguyen J, Alden B, Birdsall R, Han D, Isaac G, Lauber M. Challenges and emerging trends in liquid chromatography-based analyses of mRNA pharmaceuticals. J Pharm Biomed Anal 2023; 224:115174. [PMID: 36446261 PMCID: PMC9678211 DOI: 10.1016/j.jpba.2022.115174] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 11/13/2022] [Accepted: 11/16/2022] [Indexed: 11/23/2022]
Abstract
Lipid encapsulated messenger RNA (LNP mRNA) has garnered a significant amount of interest from the pharmaceutical industry and general public alike. This attention has been catalyzed by the clinical success of LNP mRNA for SARS-CoV-2 vaccination as well as future promises that might be fulfilled by the biotechnology pipeline, such as the in vivo delivery of a CRISPR/Cas9 complex that can edit patient cells to reduce levels of low-density lipoprotein. LNP mRNAs are comprised of various chemically diverse molecules brought together in a sophisticated intermolecular complex. This can make it challenging to achieve thorough analytical characterization. Nevertheless, liquid chromatography is becoming an increasingly relied upon technique for LNP mRNA analyses. Although there have been significant advances in all types of LNP mRNA analyses, this review focuses on recent developments and the possibilities of applying anion exchange (AEX) and ion pairing reversed phase (IP-RP) liquid chromatography for intact mRNAs as well as techniques for oligo mapping analysis, 5' endcap testing and lipid compositional assays.
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Investigations of polymer samples of polyamide 11 concerning the content of monomer, oligomers, and the oxidation stabilizer Irganox 1098 by utilizing inverse gradient HPLC in combination with a triple detection system (diode array detection/mass spectrometry/charged aerosol detection). TALANTA OPEN 2021. [DOI: 10.1016/j.talo.2020.100023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Wong Y, Or M, Lau H, Wong S, Fung W. Analysis of underivatized alditols in traditional Chinese medicines by liquid chromatography–tandem mass spectrometry based on ligand exchange chromatography. SEPARATION SCIENCE PLUS 2021. [DOI: 10.1002/sscp.202000084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yiu‐Tung Wong
- Analytical and Advisory Services Division Government Laboratory Hong Kong Special Administrative Region Kowloon P. R. China
| | - Mei‐Sze Or
- Analytical and Advisory Services Division Government Laboratory Hong Kong Special Administrative Region Kowloon P. R. China
| | - Hoi‐Ho Lau
- Analytical and Advisory Services Division Government Laboratory Hong Kong Special Administrative Region Kowloon P. R. China
| | - Sau‐Chun Wong
- Analytical and Advisory Services Division Government Laboratory Hong Kong Special Administrative Region Kowloon P. R. China
| | - Wai‐Hong Fung
- Analytical and Advisory Services Division Government Laboratory Hong Kong Special Administrative Region Kowloon P. R. China
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Knol WC, Pirok BWJ, Peters RAH. Detection challenges in quantitative polymer analysis by liquid chromatography. J Sep Sci 2020; 44:63-87. [PMID: 32935906 PMCID: PMC7821191 DOI: 10.1002/jssc.202000768] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 09/14/2020] [Accepted: 09/14/2020] [Indexed: 12/19/2022]
Abstract
Accurate quantification of polymer distributions is one of the main challenges in polymer analysis by liquid chromatography. The response of contemporary detectors is typically influenced by compositional features such as molecular weight, chain composition, end groups, and branching. This renders the accurate quantification of complex polymers of which there are no standards available, extremely challenging. Moreover, any (programmed) change in mobile-phase composition may further limit the applicability of detection techniques. Current methods often rely on refractive index detection, which is not accurate when dealing with complex samples as the refractive-index increment is often unknown. We review current and emerging detection methods in liquid chromatography with the aim of identifying detectors, which can be applied to the quantitative analysis of complex polymers.
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Affiliation(s)
- Wouter C Knol
- Analytical Chemistry Group, van't Hoff Institute for Molecular Sciences (HIMS), Faculty of Science, University of Amsterdam, Amsterdam, The Netherlands.,Centre for Analytical Sciences Amsterdam, Amsterdam, The Netherlands
| | - Bob W J Pirok
- Analytical Chemistry Group, van't Hoff Institute for Molecular Sciences (HIMS), Faculty of Science, University of Amsterdam, Amsterdam, The Netherlands.,Centre for Analytical Sciences Amsterdam, Amsterdam, The Netherlands
| | - Ron A H Peters
- Analytical Chemistry Group, van't Hoff Institute for Molecular Sciences (HIMS), Faculty of Science, University of Amsterdam, Amsterdam, The Netherlands.,Centre for Analytical Sciences Amsterdam, Amsterdam, The Netherlands.,DSM Resins & Functional Materials, Analytical Technology Centre, Waalwijk, The Netherlands
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Guo X, Elkashef SM, Loadman PM, Patterson LH, Falconer RA. Recent advances in the analysis of polysialic acid from complex biological systems. Carbohydr Polym 2019; 224:115145. [PMID: 31472857 DOI: 10.1016/j.carbpol.2019.115145] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 07/26/2019] [Accepted: 07/29/2019] [Indexed: 12/25/2022]
Abstract
Polysialic acid (polySia) is a unique, well-characterised carbohydrate polymer highly-expressed on the cell surface of neurons in the early stages of mammalian brain development. Post-embryogenesis, it is also re-expressed in a number of tumours of neuroendocrine origin. It plays important roles in modulating cell-cell, and cell-matrix adhesion and migration, tumour invasion and metastasis. Techniques for structural and quantitative characterisation of polySia from tumours and cancer cells are thus essential in exploring the relationship between polySia expression levels and structural and functional changes associated with cancer progression and metastasis. A variety of techniques have been developed to structurally and quantitatively analyse polySia in clinical tissues and other biological samples. In this review, analytical approaches used for the determination of polySia in biological matrices in the past 20 years are discussed, with a particular focus on chemical approaches, and quantitative analysis.
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Affiliation(s)
- Xiaoxiao Guo
- Institute of Cancer Therapeutics, Faculty of Life Sciences, University of Bradford, Bradford BD7 1DP, United Kingdom
| | - Sara M Elkashef
- Institute of Cancer Therapeutics, Faculty of Life Sciences, University of Bradford, Bradford BD7 1DP, United Kingdom
| | - Paul M Loadman
- Institute of Cancer Therapeutics, Faculty of Life Sciences, University of Bradford, Bradford BD7 1DP, United Kingdom
| | - Laurence H Patterson
- Institute of Cancer Therapeutics, Faculty of Life Sciences, University of Bradford, Bradford BD7 1DP, United Kingdom
| | - Robert A Falconer
- Institute of Cancer Therapeutics, Faculty of Life Sciences, University of Bradford, Bradford BD7 1DP, United Kingdom.
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Charged aerosol detector HPLC as a characterization and quantification application of biopharmaceutically relevant polysialic acid from E. coli K1. J Chromatogr A 2019; 1599:85-94. [DOI: 10.1016/j.chroma.2019.03.069] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 03/28/2019] [Accepted: 03/31/2019] [Indexed: 11/18/2022]
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9
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Zhang K, Kurita KL, Venkatramani C, Russell D. Seeking universal detectors for analytical characterizations. J Pharm Biomed Anal 2018; 162:192-204. [PMID: 30265979 DOI: 10.1016/j.jpba.2018.09.029] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 09/14/2018] [Accepted: 09/15/2018] [Indexed: 12/11/2022]
Abstract
It is highly desirable to have a universal detector that can detect all types of compounds and give a uniform response regardless of the physiochemical properties of the compounds. With such a universal detector, all components in a sample can be accurately quantified without the need for individual standards. This is especially needed for the characterization of unknowns and for non-targeted analysis, or for samples that have no isolated standards available for each component. Over the years, much effort has been put into seeking a universal detection technology. In this review, we discuss the commonly used detectors for analytical characterization, including UV, RI, ELSD, CAD, CLND, FID, VUV, MS, NMR, and hyphenated detection, with the focuses on the "universal" features of these detectors regarding the types of molecules they can detect and the uniformity of responses.
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Affiliation(s)
- Kelly Zhang
- Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, United States.
| | - Kenji L Kurita
- Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, United States
| | | | - David Russell
- Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, United States
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Baker TR, Regg BT. A multi-detector chromatographic approach for characterization and quantitation of botanical constituents to enable in silico safety assessments. Anal Bioanal Chem 2018; 410:5143-5154. [PMID: 29995187 PMCID: PMC6061755 DOI: 10.1007/s00216-018-1163-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Revised: 03/30/2018] [Accepted: 05/25/2018] [Indexed: 11/29/2022]
Abstract
An approach has been developed to characterize the individual chemical constituents of botanicals. The challenge was to identify and quantitate the significant analytes in these complex mixtures, largely in the absence of authentic standards. The data-rich information content generated by this three-detector configuration was specifically intended to be used to conduct safety and/or quality evaluations for complex botanical mixtures, on a chemical constituent basis. The approach utilized a broad gradient UHPLC chromatographic separation. Following the chromatographic separation and UV detection, the eluent was split and sent into a charged aerosol detector (CAD), for quantitation, and a quadrupole/time-of-flight high-resolution mass spectrometer for component identification. The known bias of the otherwise universal CAD response, for organic solvent composition of the mobile phase, was compensated by the addition of an inverse gradient make-up stream. This approach and the orthogonal information content from the chromatography and three different detectors was specifically designed to enable in-silico safety assessments. These guide, minimize, or even eliminate the need for in vivo and in vitro safety assessments. The methodology was developed and demonstrated using standardized extracts of Ginkgo biloba. Results from the development of this novel approach and the characterization example reported here demonstrate the suitability of this instrumental configuration for enabling in-silico safety assessments and proving general quality assessments of botanicals.
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Affiliation(s)
- Timothy R Baker
- The Procter & Gamble Company, 8700 Mason-Montgomery Road, Mason, OH, 45040, USA.
| | - Brian T Regg
- The Procter & Gamble Company, 8700 Mason-Montgomery Road, Mason, OH, 45040, USA
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Nilsson A, Salo I, Plaza M, Björck I. Effects of a mixed berry beverage on cognitive functions and cardiometabolic risk markers; A randomized cross-over study in healthy older adults. PLoS One 2017; 12:e0188173. [PMID: 29141041 PMCID: PMC5687726 DOI: 10.1371/journal.pone.0188173] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Accepted: 11/02/2017] [Indexed: 12/20/2022] Open
Abstract
Background Berries and associated bioactive compounds, e.g. polyphenols and dietary fibre (DF), may have beneficial implications with respect to the metabolic syndrome, including also cognitive functions. The aim of this study was to evaluate effects on cognitive functions and cardiometabolic risk markers of 5 wk intervention with a mixture of berries, in healthy humans. Methods Forty healthy subjects between 50–70 years old were provided a berry beverage based on a mixture of berries (150g blueberries, 50g blackcurrant, 50g elderberry, 50g lingonberries, 50g strawberry, and 100g tomatoes) or a control beverage, daily during 5 weeks in a randomized crossover design. The control beverage (water based) was matched with respect to monosaccharides, pH, and volume. Cognitive tests included tests of working memory capacity, selective attention, and psychomotor reaction time. Cardiometabolic test variables investigated were blood pressure, fasting blood concentrations of glucose, insulin, blood lipids, inflammatory markers, and markers of oxidative stress. Results The daily amounts of total polyphenols and DF from the berry beverage were 795 mg and 11g, respectively. There were no polyphenols or DF in the control beverage. The berry intervention reduced total- and LDL cholesterol compared to baseline (both P<0.05), and in comparison to the control beverage (P<0.005 and P<0.01, respectively). The control beverage increased glucose concentrations (P<0.01) and tended to increase insulin concentrations (P = 0.064) from base line, and increased insulin concentrations in comparison to the berry beverage (P<0.05). Subjects performed better in the working memory test after the berry beverage compared to after the control beverage (P<0.05). No significant effects on the other test variables were observed. Conclusions The improvements in cardiometabolic risk markers and cognitive performance after the berry beverage suggest preventive potential of berries with respect to type 2 diabetes, cardiovascular disease, and associated cognitive decline. Possibly the polyphenols and DF contributed to the beneficial effects. Trial registration ClinicalTrials.gov: NCT01562392.
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Affiliation(s)
- Anne Nilsson
- Food for Health Science Centre, Lund University, Lund, Sweden
- Department of Food Technology, Engineering and Nutrition, Lund University, Lund, Sweden
- * E-mail:
| | - Ilkka Salo
- Department of Psychology, Lund University, Lund, Sweden
| | - Merichel Plaza
- Department of Chemistry, Centre for Analysis and Synthesis, Lund University, Lund, Sweden
| | - Inger Björck
- Food for Health Science Centre, Lund University, Lund, Sweden
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Sastre F, Ferreira F. Letter to the Editor-In-Chief of Food Chemistry. Food Chem 2017; 224:310-311. [DOI: 10.1016/j.foodchem.2016.12.085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2016] [Accepted: 12/22/2016] [Indexed: 11/29/2022]
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13
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Green and Efficient Extraction Method to Determine Polyphenols in Cocoa and Cocoa Products. FOOD ANAL METHOD 2017. [DOI: 10.1007/s12161-017-0830-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Al Hamimi S, Heyman-Lindén L, Plaza M, Turner C, Berger K, Spégel P. Alterations in the plasma metabolite profile associated with improved hepatic function and glycemia in mice fed lingonberry supplemented high-fat diets. Mol Nutr Food Res 2016; 61. [PMID: 27739180 DOI: 10.1002/mnfr.201600442] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Revised: 10/04/2016] [Accepted: 10/09/2016] [Indexed: 12/26/2022]
Abstract
SCOPE Lingonberries have been shown to reduce the detrimental effects of high-fat diet (HFD) on weight gain, plasma glucose, and inflammation. However, the extent of effects was recently shown to vary between different batches of berries. Here, we examine the metabolic response to two independent batches of lingonberries. METHODS AND RESULTS Alterations in the phenotype and circulating metabolome elicited by three matched HFDs, two of which containing lingonberries (L1D and L2D) from different sources, were investigated. Glycemia was improved only in mice fed L1D, whereas liver function was improved and inflammation reduced in mice fed both L1D and L2D, compared to mice fed HFD. The unique improvement in glycemia elicited by L1D was associated with a 21% increase in circulating levels of fatty acids. Increased levels of phosphatidylcholines (62%) and lysophosphatidylcholines (28%) and decreased levels of serine (-13%) and sphingomyelins (-26%) were observed in mice fed L1D and L2D, as compared to HFD. CONCLUSION The unique improvement in glycemia in mice fed L1D was associated with a normal metabolic control with an altered set point. Moreover, the batch-independent reduction in liver steatosis and inflammation, was associated with an altered sphingomyelin metabolism.
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Affiliation(s)
- Said Al Hamimi
- Department of Chemistry, Centre for Analysis and Synthesis, Lund University, Lund, Sweden
| | | | - Merichel Plaza
- Department of Chemistry, Centre for Analysis and Synthesis, Lund University, Lund, Sweden
| | - Charlotta Turner
- Department of Chemistry, Centre for Analysis and Synthesis, Lund University, Lund, Sweden
| | - Karin Berger
- Department of Experimental Medical Science, Lund University, Lund, Sweden
| | - Peter Spégel
- Department of Chemistry, Centre for Analysis and Synthesis, Lund University, Lund, Sweden.,Department of Clinical Sciences Malmö, Unit of Molecular Metabolism, Lund University Diabetes Centre, Malmö, Sweden
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Plaza M, Batista ÂG, Cazarin CBB, Sandahl M, Turner C, Östman E, Maróstica Júnior MR. Characterization of antioxidant polyphenols from Myrciaria jaboticaba peel and their effects on glucose metabolism and antioxidant status: A pilot clinical study. Food Chem 2016; 211:185-97. [DOI: 10.1016/j.foodchem.2016.04.142] [Citation(s) in RCA: 101] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Revised: 04/01/2016] [Accepted: 04/27/2016] [Indexed: 01/13/2023]
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Lee GJ, Shin BK, Yu YH, Ahn J, Kwon SW, Park JH. Systematic development of a group quantification method using evaporative light scattering detector for relative quantification of ginsenosides in ginseng products. J Pharm Biomed Anal 2016; 128:158-165. [PMID: 27262109 DOI: 10.1016/j.jpba.2016.05.030] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 05/16/2016] [Accepted: 05/18/2016] [Indexed: 11/19/2022]
Abstract
The determination for the contents of multi-components in ginseng products has come to the fore by demands of in-depth information, but the associated industries confront the high cost of securing pure standards for the continuous quality evaluation of the products. This study aimed to develop a prospective high-performance liquid chromatography-evaporative light scattering detector (HPLC-ELSD) method for relative quantification of ginsenosides in ginseng products without a considerable change from the conventional gradient analysis. We investigated the effects of mobile phase composition and elution bandwidth, which are potential variables affecting the ELSD response in the gradient analysis. Similar ELSD response curves of nine major ginsenosides were obtained under the identical flow injection conditions, and the response increased as the percentage of organic solvent increased. The nine ginsenosides were divided into three groups to confirm the effect of elution bandwidth. The ELSD response significantly decreased in case of the late eluted ginsenoside in the individual groups under the isocratic conditions. With the consideration of the two important effects, stepwise changes of the gradient condition were carried out to reach a group quantification method. The inconsistent responses of the nine ginsenosides were reconstituted to three normalized responses by the stepwise changes of the gradient condition, and this result actualized relative quantification in the individual groups. The availability was confirmed by comparing the ginsenoside contents in a base material of ginseng products determined by the direct and group quantification method. The largest difference in the determination results from the two methods was 8.26%, and the difference of total contents was only 0.91%.
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Affiliation(s)
- Gwang Jin Lee
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Byong-Kyu Shin
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Yun-Hyun Yu
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Jongsung Ahn
- National Agricultural Products Quality Management Service, Gimcheon, Gyeongbuk 39660, Republic of Korea
| | - Sung Won Kwon
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Jeong Hill Park
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul 08826, Republic of Korea.
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MALDI-TOF mass spectrometry and reversed-phase HPLC-ELSD chromatography for structural and quantitative studies of major steroid saponins in commercial extracts of Yucca schidigera Roezl. J Pharm Biomed Anal 2016; 120:270-82. [DOI: 10.1016/j.jpba.2015.12.043] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Revised: 12/17/2015] [Accepted: 12/21/2015] [Indexed: 11/23/2022]
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Spizzirri UG, Parisi OI, Picci N, Restuccia D. Application of LC with Evaporative Light Scattering Detector for Biogenic Amines Determination in Fair Trade Cocoa-Based Products. FOOD ANAL METHOD 2016. [DOI: 10.1007/s12161-016-0398-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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20
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Ouyang LF, Wang ZL, Dai JG, Chen L, Zhao YN. Determination of total ginsenosides in ginseng extracts using charged aerosol detection with post-column compensation of the gradient. Chin J Nat Med 2015; 12:857-68. [PMID: 25480518 DOI: 10.1016/s1875-5364(14)60129-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2013] [Indexed: 12/22/2022]
Abstract
AIM Variation in structure-related components in plant products prompted the trend to establish methods, using multiple or total analog analysis, for their effective quality control. However, the general use of routine quality control is restricted by the limited availability of reference substances. Using an easily available single marker as a reference standard to determine multiple or total analogs should be a practical option. METHOD In this study, the Ultra-HPLC method was used for the baseline separation of the main components in ginseng extracts. Using a plant chemical component database, ginsenosides in ginseng extracts were identified by Ultra-HPLC-MS analysis. The charged aerosol detection (CAD) system with post-column compensation of the gradient generates a similar response for identical amounts of different analytes, and thus, the content of each ginsenoside in ginseng extracts was determined by comparing the analyte peak area with the reference standard (determination of total analogs by single marker, DTSM). The total ginsenoside content was determined by the summation of reference standard and other ginsenoside components. RESULTS The results showed that DTSM approaches were available for the determination of total ginsenosides in a high purity ginseng extract because of the removal of impurities. In contrast, DTSM approaches might be suitable for determination of multiple ginsenosides without interference from impurities in the crude ginseng extract. CONCLUSION Future practical studies similar to the present study should be conducted to verify that DTSM approaches based on CAD with post-column inverse gradient for uniform response are ideal for the quality control of plant products.
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Affiliation(s)
- Liu-Feng Ouyang
- Research Center of Basic Medical College, Nanjing University of Traditional Chinese Medicine, Nanjing 210046, China
| | - Zhong-Li Wang
- Research Center of Basic Medical College, Nanjing University of Traditional Chinese Medicine, Nanjing 210046, China
| | - Jian-Guo Dai
- Research Center of Basic Medical College, Nanjing University of Traditional Chinese Medicine, Nanjing 210046, China
| | - Lin Chen
- Research Center of Basic Medical College, Nanjing University of Traditional Chinese Medicine, Nanjing 210046, China
| | - Yu-Nan Zhao
- Research Center of Basic Medical College, Nanjing University of Traditional Chinese Medicine, Nanjing 210046, China.
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Zhao YN, Wang ZL, Dai JG, Chen L, Huang YF. Preparation and quality assessment of high-purity ginseng total saponins by ion exchange resin combined with macroporous adsorption resin separation. Chin J Nat Med 2015; 12:382-92. [PMID: 24856763 DOI: 10.1016/s1875-5364(14)60048-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2013] [Indexed: 11/15/2022]
Abstract
AIM To prepare high-purity ginseng total saponins from a water decoction of Chinese ginseng root. METHOD Total saponins were efficiently purified by dynamic anion-cation exchange following the removal of hydrophilic impurities by macroporous resin D101. For quality control, ultrahigh-performance liquid chromatography with a charged aerosol detector (CAD) was applied to quantify marker components. The total saponin content was estimated by a colorimetric method using a vanillin-vitriol system and CAD response. RESULTS D201, which consisted of a cross-linked polystyrene matrix and -N(+)(CH3)3 functional groups, was the best of the four anion exchange resins tested. However, no significant difference in cation exchange ability was observed between D001 (strong acid) and D113 (weak acid), although they have different functional groups and matrices. After purification in combination with D101, D201, and D113, the estimated contents of total saponins were 107% and 90% according to the colorimetric method and CAD response, respectively. The total amount of representative ginsenosides Re, Rd, Rg1, and compound K was approximately 22% based on ultrahigh-performance liquid chromatography-CAD quantitative analysis. CONCLUSION These findings suggest that an ion exchange resin, combined with macroporous adsorption resin separation, is a promising and feasible purification procedure for neutral natural polar components.
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Affiliation(s)
- Yu-Nan Zhao
- Key Laboratory of Brain Research, Basic Medical College, Nanjing University of Traditional Chinese Medicine, Nanjing 210046, China.
| | - Zhong-Li Wang
- Key Laboratory of Brain Research, Basic Medical College, Nanjing University of Traditional Chinese Medicine, Nanjing 210046, China
| | - Jian-Guo Dai
- Key Laboratory of Brain Research, Basic Medical College, Nanjing University of Traditional Chinese Medicine, Nanjing 210046, China
| | - Lin Chen
- Key Laboratory of Brain Research, Basic Medical College, Nanjing University of Traditional Chinese Medicine, Nanjing 210046, China
| | - Yu-Fang Huang
- Key Laboratory of Brain Research, Basic Medical College, Nanjing University of Traditional Chinese Medicine, Nanjing 210046, China
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22
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Relative quantification of multi-components in Panax notoginseng (Sanqi) by high-performance liquid chromatography with mass spectrometry using mobile phase compensation. J Pharm Biomed Anal 2015; 102:150-6. [DOI: 10.1016/j.jpba.2014.09.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Revised: 09/02/2014] [Accepted: 09/06/2014] [Indexed: 12/12/2022]
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23
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Khandagale MM, Hilder EF, Shellie RA, Haddad PR. Assessment of the complementarity of temperature and flow-rate for response normalisation of aerosol-based detectors. J Chromatogr A 2014; 1356:180-7. [DOI: 10.1016/j.chroma.2014.06.055] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Revised: 06/16/2014] [Accepted: 06/17/2014] [Indexed: 10/25/2022]
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24
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25
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Koster S, Rennen M, Leeman W, Houben G, Muilwijk B, van Acker F, Krul L. A novel safety assessment strategy for non-intentionally added substances (NIAS) in carton food contact materials. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2014; 31:422-43. [PMID: 24237267 DOI: 10.1080/19440049.2013.866718] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
One of the main challenges in food contact materials research is to prove that the presence of non-intentionally added substances (NIAS) is not a safety issue. Migration extracts may contain many unknown substances present at low concentrations. It is difficult and time-consuming to identify all these potential NIAS and concurrently to assess their health risk upon exposure, whereas the health relevance at low exposure levels might not even be an issue. This paper describes a scientifically based, but pragmatic safety assessment approach for unknown substances present at low exposure levels in food contact matrices. This complex mixture safety assessment strategy (CoMSAS) enables one to distinguish toxicologically relevant from toxicologically less relevant substances, when related to their respective levels of exposure, and allows one to focus on the substances of potential health concern. In particular, substances for which exposure will be below certain thresholds may be considered not of health relevance in case specific classes of substances are excluded. This can reduce the amount of work needed for identification, characterisation and evaluation of unknown substances at low concentration. The CoMSAS approach is presented in this paper using a safety assessment of unknown NIAS that may migrate from three carton samples.
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26
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Application of the evaporative light scattering detector to analytical problems in polymer science. J Chromatogr A 2013; 1310:1-14. [DOI: 10.1016/j.chroma.2013.08.041] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Revised: 08/06/2013] [Accepted: 08/12/2013] [Indexed: 11/18/2022]
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27
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E.Lesellier, Valarché A, West C, Dreux M. Effects of selected parameters on the response of the evaporative light scattering detector in supercritical fluid chromatography. J Chromatogr A 2012; 1250:220-6. [DOI: 10.1016/j.chroma.2012.04.065] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2012] [Revised: 04/24/2012] [Accepted: 04/26/2012] [Indexed: 11/24/2022]
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28
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de Villiers A, Alberts P, Tredoux AG, Nieuwoudt HH. Analytical techniques for wine analysis: An African perspective; a review. Anal Chim Acta 2012; 730:2-23. [DOI: 10.1016/j.aca.2011.11.064] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2011] [Revised: 11/15/2011] [Accepted: 11/27/2011] [Indexed: 10/14/2022]
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29
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Investigation of polar organic solvents compatible with Corona Charged Aerosol Detection and their use for the determination of sugars by hydrophilic interaction liquid chromatography. Anal Chim Acta 2012; 750:199-206. [PMID: 23062441 DOI: 10.1016/j.aca.2012.04.002] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2012] [Revised: 04/03/2012] [Accepted: 04/03/2012] [Indexed: 11/24/2022]
Abstract
A range of organic solvents (ethanol, isopropanol and acetone) has been investigated as alternatives to acetonitrile and methanol when used in conjunction with Corona Charged Aerosol Detection (Corona CAD). These solvents have been evaluated with regard to their effect on the response of the Corona CAD. Three dimensional response surfaces were constructed using raw data showing the relationship between detector response, analyte concentration and percentage of organic solvent in the mobile phase, using sucralose or quinine as the test analyte. The detector response was non-linear in terms of analyte concentration for all solvents tested. However, detector response varied in an approximately linear manner with percentage of organic solvent over the range 0-40% for ethanol or isopropanol and 0-80% for acetone and methanol. The chromatographic performance of the various solvents when used as aqueous-organic mobile phases was evaluated for isocratic and gradient separations of sugars and sugar alcohols by hydrophilic interaction liquid chromatography (HILIC) using an Asahipak NH2P-504E column coupled with Corona CAD detection. It was found that whilst acetonitrile provided the highest column efficiencies and lowest detection limits of the solvents studied, acetone also performed well and could be used to resolve the same number of analytes as was possible with acetonitrile. Typical efficiencies and detection limits of 5330 plates m(-1) and 1.25 μg mL(-1), respectively, were achieved when acetone was used as the organic modifier. Acetone was utilised successfully as an organic modifier in the HILIC separation of carbohydrates in a beer sample and also for a partially digested dextran sample.
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Restuccia D, Spizzirri UG, Puoci F, Cirillo G, Vinci G, Picci N. Determination of Phospholipids in Food Samples. FOOD REVIEWS INTERNATIONAL 2012. [DOI: 10.1080/87559129.2011.563398] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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31
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Uliyanchenko E, van der Wal S, Schoenmakers PJ. Challenges in polymer analysis by liquid chromatography. Polym Chem 2012. [DOI: 10.1039/c2py20274c] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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32
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Xue X, Chen L, Zhou J, Wu L, Li Y, Chen F, Zhang J, Zhao J. UPLC-ELSD Determination of 1-Octacosanol in Raw Material and Health Products. Chromatographia 2011. [DOI: 10.1007/s10337-011-2166-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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33
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Jia S, Park JH, Lee J, Kwon SW. Comparison of two aerosol-based detectors for the analysis of gabapentin in pharmaceutical formulations by hydrophilic interaction chromatography. Talanta 2011; 85:2301-6. [DOI: 10.1016/j.talanta.2011.04.012] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2010] [Revised: 04/03/2011] [Accepted: 04/05/2011] [Indexed: 11/30/2022]
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34
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Restuccia D, Spizzirri UG, Puoci F, Cirillo G, Curcio M, Parisi OI, Iemma F, Picci N. A new method for the determination of biogenic amines in cheese by LC with evaporative light scattering detector. Talanta 2011; 85:363-9. [PMID: 21645711 DOI: 10.1016/j.talanta.2011.03.080] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2010] [Revised: 03/15/2011] [Accepted: 03/28/2011] [Indexed: 11/28/2022]
Abstract
This paper presents a new LC method with evaporative light scattering detection (ELSD), for the separation and determination of the biogenic amines (histamine, spermidine, spermine, tyramine, putrescine and β-phenylethylamine) which are commonly present in cheese, as their presence and relative amounts give useful information about freshness, level of maturing, quality of storage and cheese authentication. The LC-ELSD method is validated by comparison of the results with those obtained through LC-UV determination, based on a pre-column dansyl chloride derivatisation step. The obtained data demonstrate that both methods can be interchangeably used for biogenic amines determination in cheese. The new LC-ELSD method shows good precision and permits to achieve, for standard solutions, limit of detection (LOD) values ranging from 1.4 to 3.6 mg L(-1) and limit of quantitation (LOQ) values ranging from 3.6 to 9.3 mg L(-1). The whole methodology, comprehensive of the homogenization-extraction process and LC-ELSD analysis, has been applied in the analysis of a typical Calabria (Southern Italy) POD cheese, known as Caciocavallo Silano. The most aboundant amine found was histamine, followed, in decreasing order, by tyramine, spermine, putrescine, β-phenylethylamine and spermidine, for a total amount of 127 mg kg(-1). This value does not represent a possible risk for consumer health, according to the toxicity levels reported in literature and regarded as acceptable.
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Affiliation(s)
- Donatella Restuccia
- Dipartimento di Scienze Farmaceutiche, Università della Calabria, Edificio Polifunzionale, Arcavacata di Rende (CS) 87036, Italy.
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Hutchinson JP, Li J, Farrell W, Groeber E, Szucs R, Dicinoski G, Haddad PR. Universal response model for a corona charged aerosol detector. J Chromatogr A 2010; 1217:7418-27. [DOI: 10.1016/j.chroma.2010.09.056] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2010] [Revised: 08/26/2010] [Accepted: 09/22/2010] [Indexed: 11/16/2022]
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36
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Bai CC, Han SY, Chai XY, Jiang Y, Li P, Tu PF. Sensitive Determination of Saponins in Radix et Rhizoma Notoginseng by Charged Aerosol Detector Coupled with HPLC. J LIQ CHROMATOGR R T 2010. [DOI: 10.1080/10826070802603187] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Chang-Cai Bai
- a Key Laboratory of Modern Chinese Medicines, Ministry of Education and Department of Pharmacognosy , China Pharmaceutical University , Nanjing, P. R. China
- b State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University Health Science Center , Beijing, P. R. China
| | - Shu-Yan Han
- b State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University Health Science Center , Beijing, P. R. China
| | - Xing-Yun Chai
- c Key Laboratory of Marine Bio-resources Sustainable Utilization, South China Sea Institute of Oceanology, Chinese Academy of Sciences , Guangzhou, P. R. China
| | - Yong Jiang
- b State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University Health Science Center , Beijing, P. R. China
| | - Ping Li
- a Key Laboratory of Modern Chinese Medicines, Ministry of Education and Department of Pharmacognosy , China Pharmaceutical University , Nanjing, P. R. China
| | - Peng-Fei Tu
- a Key Laboratory of Modern Chinese Medicines, Ministry of Education and Department of Pharmacognosy , China Pharmaceutical University , Nanjing, P. R. China
- b State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University Health Science Center , Beijing, P. R. China
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Merle C, Laugel C, Chaminade P, Baillet-Guffroy A. QUANTITATIVE STUDY OF THE STRATUM CORNEUM LIPID CLASSES BY NORMAL PHASE LIQUID CHROMATOGRAPHY: COMPARISON BETWEEN TWO UNIVERSAL DETECTORS. J LIQ CHROMATOGR R T 2010. [DOI: 10.1080/10826071003608520] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- C. Merle
- a Groupe Chimie Analytique de Paris-Sud EA, School of Pharmacy , Châtenay-Malabry Cedex, France
| | - C. Laugel
- a Groupe Chimie Analytique de Paris-Sud EA, School of Pharmacy , Châtenay-Malabry Cedex, France
| | - P. Chaminade
- a Groupe Chimie Analytique de Paris-Sud EA, School of Pharmacy , Châtenay-Malabry Cedex, France
| | - A. Baillet-Guffroy
- a Groupe Chimie Analytique de Paris-Sud EA, School of Pharmacy , Châtenay-Malabry Cedex, France
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38
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Shaodong J, Lee WJ, Ee JW, Park JH, Kwon SW, Lee J. Comparison of ultraviolet detection, evaporative light scattering detection and charged aerosol detection methods for liquid-chromatographic determination of anti-diabetic drugs. J Pharm Biomed Anal 2009; 51:973-8. [PMID: 20004074 DOI: 10.1016/j.jpba.2009.10.019] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2009] [Revised: 10/19/2009] [Accepted: 10/21/2009] [Indexed: 11/25/2022]
Abstract
Recently, charged aerosol detection (CAD), a new kind of universal detection method, has been widely employed in the HPLC system. In the present study, four kinds of anti-diabetic drug standards, glipizide, gliclazide, glibenclamide and glimepiride were determined by ultraviolet (UV) detection, evaporative light scattering detection (ELSD) and the aforementioned CAD. The results were compared with reference to linearity, accuracy, precision and limit of detection (LOD). All of the experiments were performed on a reverse phase column with water and acetonitrile as the mobile phase. Separations were achieved under the same chromatographic conditions for each detection method. As a result, CAD generated nearly uniform responses compared with UV detection and ELSD. It showed the best accuracy and LOD among 3 detectors and had similar precision with UV detection at higher concentrations while UV detection showed a better precision at lower concentrations than did CAD or ELSD. The LOD of CAD, in fact, can be up to two times higher than that of ELSD. The UV and ELSD linearity was satisfactory at R(2)>0.99, though in the case of CAD, a log-log transformation was needed. The proposed methods were also applied to the real anti-diabetic drugs and diabetes-related dietary supplements.
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Affiliation(s)
- Jia Shaodong
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul 151-742, Republic of Korea
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39
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Natalini B, Sardella R, Gioiello A, Carbone G, Dawgul M, Pellicciari R. Side-chain modified bile acids: chromatographic separation of 23-methyl epimers. J Sep Sci 2009; 32:2022-33. [DOI: 10.1002/jssc.200900080] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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40
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Scheidl COR, Menzinger F, Maier EJ, Capek E, Scheidl O, Huck CW. Simultaneous Quantification of Neomycin and Bacitracin by LC-ELSD. Chromatographia 2009. [DOI: 10.1365/s10337-009-1100-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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41
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Van Arnum SD, Niemczyk HJ, Chang C. HPLC method validation studies on a specific assay for monomethoxypoly(ethylene glycol) succinimido carbonate (mPEG-SC). J Pharm Biomed Anal 2009; 50:138-43. [PMID: 19427154 DOI: 10.1016/j.jpba.2009.04.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2008] [Revised: 03/30/2009] [Accepted: 04/01/2009] [Indexed: 11/29/2022]
Abstract
An UV-HPLC method for the determination of the potency of mPEG-SC, 5 kDa (1) has been developed and validated. Validation acceptance criteria that is typical of small molecule method validation was successfully applied for this method. The method relies on the HPLC separation of mPEG-OH, 5 kDa (2) and a derivatized form of mPEG-SC, 5 kDa (1). 1-Naphthylmethylamine reacts with mPEG-SC, 5 kDa (1) to form a stable, strongly UV absorbing carbamate 3. When the eluent is analyzed by UV detection at 220 nm, the method was shown to be linear, precise and accurate. The limit of detection of the method was 0.1 microg.
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42
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Liang XM, Jin Y, Wang YP, Jin GW, Fu Q, Xiao YS. Qualitative and quantitative analysis in quality control of traditional Chinese medicines. J Chromatogr A 2008; 1216:2033-44. [PMID: 18656880 DOI: 10.1016/j.chroma.2008.07.026] [Citation(s) in RCA: 147] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2008] [Revised: 05/31/2008] [Accepted: 07/01/2008] [Indexed: 10/21/2022]
Abstract
Separation techniques with high efficiency and sensitive detection have been widely used for quality control of traditional Chinese medicines (TCMs). High-performance liquid chromatography, gas chromatography, and capillary electrophoresis are commonly used to separate various components in TCMs. Ultraviolet detection, fluorescence detection, evaporative light-scattering detection, mass spectrometry and nuclear magnetic resonance can be applied to separation techniques for qualitative and quantitative analysis of TCMs. The development of quality control for TCMs based on quantitative and qualitative analysis from 2000 to 2007 are reviewed; the fingerprint technique is also discussed due to its broad application in the quality control of TCMs. Prospects for further research based on our primary results are also discussed.
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Affiliation(s)
- Xin-miao Liang
- Dalian Institute of Chemical Physics, Graduate School of the Chinese Academy of Sciences, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China.
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Russo R, Guillarme D, Rudaz S, Bicchi C, Veuthey JL. Evaluation of the coupling between ultra performance liquid chromatography and evaporative light scattering detector for selected phytochemical applications. J Sep Sci 2008; 31:2377-87. [DOI: 10.1002/jssc.200800078] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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44
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Takahashi K, Kinugasa S, Senda M, Kimizuka K, Fukushima K, Matsumoto T, Shibata Y, Christensen J. Quantitative comparison of a corona-charged aerosol detector and an evaporative light-scattering detector for the analysis of a synthetic polymer by supercritical fluid chromatography. J Chromatogr A 2008; 1193:151-5. [DOI: 10.1016/j.chroma.2008.04.012] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2008] [Revised: 04/04/2008] [Accepted: 04/07/2008] [Indexed: 10/22/2022]
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45
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Squibb AW, Taylor MR, Parnas BL, Williams G, Girdler R, Waghorn P, Wright AG, Pullen FS. Application of parallel gradient high performance liquid chromatography with ultra-violet, evaporative light scattering and electrospray mass spectrometric detection for the quantitative quality control of the compound file to support pharmaceutical discovery. J Chromatogr A 2008; 1189:101-8. [DOI: 10.1016/j.chroma.2007.11.017] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2007] [Revised: 11/02/2007] [Accepted: 11/06/2007] [Indexed: 11/30/2022]
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46
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Design and evaluation of a multi-detection system composed of ultraviolet, evaporative light scattering and inductively coupled plasma mass spectrometry detection for the analysis of pharmaceuticals by liquid chromatography. J Chromatogr A 2008; 1185:78-84. [DOI: 10.1016/j.chroma.2008.01.030] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2007] [Revised: 01/10/2008] [Accepted: 01/14/2008] [Indexed: 01/21/2023]
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Lísa M, Lynen F, Holčapek M, Sandra P. Quantitation of triacylglycerols from plant oils using charged aerosol detection with gradient compensation. J Chromatogr A 2007; 1176:135-42. [DOI: 10.1016/j.chroma.2007.10.075] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2007] [Revised: 10/17/2007] [Accepted: 10/24/2007] [Indexed: 11/29/2022]
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