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Wang Q, Zhang Z, Yang T, Han Y, Cheng Y, Wu J, Bai J, Ma C, Niu Y, Shuang S. Multiple fluorescence quenching effects mediated fluorescent sensing of captopril Based on amino Acids-Derivative carbon nanodots. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 269:120742. [PMID: 34952441 DOI: 10.1016/j.saa.2021.120742] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 11/24/2021] [Accepted: 12/09/2021] [Indexed: 06/14/2023]
Abstract
Carbon nanodots (CNDs) were facilely synthesized through a pyrolysis procedure with histamine, an amino acid rich in element carbon and nitrogen, being the precursor. Taking advantage of the favorable fluorescence performance of CNDs, a multiple fluorescence quenching effects mediated fluorescent sensor was established for captopril (CAP) detection. MnO2 NPs were firstly combined with CNDs via electrostatic attraction and subsequently quenched the fluorescence. The quenching mechanisms were concluded to be the combined effects of fluorescence resonance energy transfer (FRET) and inner filtration effect (IFE). Subsequently CAP triggered a unique redox reaction and decomposed the quencher so that renewed the fluorescence. Hence, the sensitive and selective detection of CAP was achieved through the indication of fluorescence recovery efficiency. A proportional range of 0.4 ∼ 60 μmol L-1 with the LOD of 0.31 μmol L-1 was obtained. The sensor was further applied to the real sample detection and the satisfactory results revealed the practical value of CNDs. The facile synthesis of CNDs and brand-new sensing mechanism made it a novel fluorescent method and could improve the analysis of CAP.
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Affiliation(s)
- Qi Wang
- Chemistry & Chemical Engineering Department, Department of Environment and Safety Engineering, Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan 030008, PR China.
| | - Ziru Zhang
- Chemistry & Chemical Engineering Department, Department of Environment and Safety Engineering, Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan 030008, PR China
| | - Tian Yang
- Chemistry & Chemical Engineering Department, Department of Environment and Safety Engineering, Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan 030008, PR China
| | - Yejiao Han
- Chemistry & Chemical Engineering Department, Department of Environment and Safety Engineering, Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan 030008, PR China
| | - Ying Cheng
- Chemistry & Chemical Engineering Department, Department of Environment and Safety Engineering, Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan 030008, PR China
| | - Jiana Wu
- Chemistry & Chemical Engineering Department, Department of Environment and Safety Engineering, Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan 030008, PR China
| | - Jingjing Bai
- Chemistry & Chemical Engineering Department, Department of Environment and Safety Engineering, Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan 030008, PR China
| | - Chunlei Ma
- Chemistry & Chemical Engineering Department, Department of Environment and Safety Engineering, Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan 030008, PR China
| | - Yulan Niu
- Chemistry & Chemical Engineering Department, Department of Environment and Safety Engineering, Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan 030008, PR China
| | - Shaomin Shuang
- College of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, PR China.
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2
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Noh JY, Kim MJ, Park JM, Yun TG, Kang MJ, Pyun JC. Laser desorption/ionization mass spectrometry of L-thyroxine (T4) using combi-matrix of α-cyano-4-hydroxycinnamic acid (CHCA) and graphene. J Anal Sci Technol 2022. [DOI: 10.1186/s40543-022-00314-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
AbstractAn optimal combi-matrix for MALDI-TOF mass spectrometry was presented for the analysis of L-thyroxine (T4) in human serum. For the selection of the optimal combi-matrix, several kinds of combi-matrices were prepared by mixing the conventional organic matrix of CHCA with nanomaterials, such as graphene, carbon nanotubes, nanoparticles of Pt and TiO2. In order to select the optimal combi-matrix, the absorption at the wavelength of laser radiation (337 nm) for the ionization of sample was estimated using UV–Vis spectrometry. And, the heat absorption properties of these combi-matrices were also analyzed using differential scanning calorimetry (DSC), such as onset temperature and fusion enthalpy. In the case of the combi-matrix of CHCA and graphene, the onset temperature and fusion enthalpy were observed to be lower than those of CHCA, which represented the enhanced transfer of heat to the analyte in comparison with CHCA. From the analysis of optical and thermal properties, the combi-matrix of CHCA and graphene was selected to be an optimal combination for the transfer of laser energy during MALDI-TOF mass spectrometry. The feasibility of the combi-matrix composed of CHCA and graphene was demonstrated for the analysis of T4 molecules using MALDI-TOF mass spectrometry. The combi-matrix of CHCA and graphene was estimated to have an improved limit of detection and a wider detection range in comparison with other kinds of combi-matrices. Finally, the MALDI-TOF MS results of T4 analysis using combi-matrix were statistically compared with those of the conventional immunoassay.
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3
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Turusova EV, Nasakin OE, Andreeva EV. Photogenerated Iodine for Determination of the Captopril Content in Solid Dosage Forms. Pharm Chem J 2021. [DOI: 10.1007/s11094-021-02502-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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4
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Kim SW, Kwon S, Kim YK. Graphene Oxide Derivatives and Their Nanohybrid Structures for Laser Desorption/Ionization Time-of-Flight Mass Spectrometry Analysis of Small Molecules. NANOMATERIALS 2021; 11:nano11020288. [PMID: 33499396 PMCID: PMC7910985 DOI: 10.3390/nano11020288] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 01/19/2021] [Accepted: 01/20/2021] [Indexed: 12/12/2022]
Abstract
Matrix-assisted laser desorption/ionization (MALDI) has been considered as one of the most powerful analytical tools for mass spectrometry (MS) analysis of large molecular weight compounds such as proteins, nucleic acids, and synthetic polymers thanks to its high sensitivity, high resolution, and compatibility with high-throughput analysis. Despite these advantages, MALDI cannot be applied to MS analysis of small molecular weight compounds (<500 Da) because of the matrix interference in low mass region. Therefore, numerous efforts have been devoted to solving this issue by using metal, semiconductor, and carbon nanomaterials for MALDI time-of-flight MS (MALDI-TOF-MS) analysis instead of organic matrices. Among those nanomaterials, graphene oxide (GO) is of particular interest considering its unique and highly tunable chemical structures composed of the segregated sp2 carbon domains surrounded by sp3 carbon matrix. Chemical modification of GO can precisely tune its physicochemical properties, and it can be readily incorporated with other functional nanomaterials. In this review, the advances of GO derivatives and their nanohybrid structures as alternatives to organic matrices are summarized to demonstrate their potential and practical aspect for MALDI-TOF-MS analysis of small molecules.
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Affiliation(s)
- Seung-Woo Kim
- Department of Chemistry, Dongguk University-Seoul, 30 Pildong-ro, Jung-gu, Seoul 04620, Korea;
| | - Sunbum Kwon
- Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Korea
- Correspondence: (S.-W.K.); (Y.-K.K.); Tel.: +82-2-820-5201 (S.-W.K.); +82-2-2260-3214 (Y.-K.K.)
| | - Young-Kwan Kim
- Department of Chemistry, Dongguk University-Seoul, 30 Pildong-ro, Jung-gu, Seoul 04620, Korea;
- Correspondence: (S.-W.K.); (Y.-K.K.); Tel.: +82-2-820-5201 (S.-W.K.); +82-2-2260-3214 (Y.-K.K.)
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5
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Yukird J, Soum V, Kwon OS, Shin K, Chailapakul O, Rodthongkum N. 3D paper-based microfluidic device: a novel dual-detection platform of bisphenol A. Analyst 2020; 145:1491-1498. [DOI: 10.1039/c9an01738k] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A novel platform of 3D paper-based microfluidic device (μPADs) was fabricated by a digital plotter for high precision analysis of bisphenol A using electrochemistry along with LDI-MS detection.
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Affiliation(s)
- Jutiporn Yukird
- Nanoscience and technology program
- Graduate School
- Chulalongkorn University
- Patumwan
- Thailand
| | - Veasna Soum
- Department of Chemistry and Institute of Biological Interfaces
- Sogang University
- Seoul 04107
- Republic of Korea
| | - Oh-Sun Kwon
- Department of Chemistry and Institute of Biological Interfaces
- Sogang University
- Seoul 04107
- Republic of Korea
| | - Kwanwoo Shin
- Department of Chemistry and Institute of Biological Interfaces
- Sogang University
- Seoul 04107
- Republic of Korea
| | - Orawon Chailapakul
- Electrochemistry and Optical Spectroscopy Research Unit
- Department of Chemistry
- Faculty of Science
- Chulalongkorn University
- Patumwan
| | - Nadnudda Rodthongkum
- Metallurgy and Materials Science Research Institute
- Chulalongkorn University
- Patumwan
- Thailand
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6
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Wu E, Feng K, Shi R, Lv R, Ouyang F, Li SSC, Zhong J, Liu J. Hybrid CuCoO-GO enables ultrasensitive detection of antibiotics with enhanced laser desorption/ionization at nano-interfaces. Chem Sci 2018; 10:257-267. [PMID: 30713636 PMCID: PMC6333240 DOI: 10.1039/c8sc03692f] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2018] [Accepted: 10/05/2018] [Indexed: 01/21/2023] Open
Abstract
The soaring concerns globally on antibiotic overuse have made calls for the development of rapid and sensitive detection methods urgent. Here we report that the hybrid CuCoO-GO matrix allows for sensitive detection of various antibiotics in combination with MALDI TOF MS. The new matrix is composed of few-layered GO nanosheets decorated with CuCoO nanoparticles with an average size of 10 nm, and exhibits excellent aqueous suspensibility. Accurate quantitation of the sulfonamide antibiotics in milk samples have been demonstrated using a CuCoO-GO matrix and a stable isotope (C13)-labeled analyte as the internal standard. Our experiments have achieved lower limits of detection (LOD) by several hundred fold for the detection of a panel of representative antibiotics, in comparison with the literature reports. Both intrabacterial and extrabacterial residual antibiotics can be sensitively detected with our method. We have further investigated the molecular mechanism of the enhanced desorption/ionization efficiency by the CuCoO-GO matrix with synchrotron radiation techniques for the first time. This work provides a sensitive matrix enabling MALDI-TOF MS to be applied in small molecular analysis, but also presents a distinct perspective on the mechanism behind the material functions.
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Affiliation(s)
- Enhui Wu
- Institute of Functional Nano and Soft Materials (FUNSOM) , Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices , Joint International Research Laboratory of Carbon-based Functional Materials and Devices , Soochow University , Suzhou , Jiangsu Province 215123 , China . ;
| | - Kun Feng
- Institute of Functional Nano and Soft Materials (FUNSOM) , Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices , Joint International Research Laboratory of Carbon-based Functional Materials and Devices , Soochow University , Suzhou , Jiangsu Province 215123 , China . ;
| | - Rui Shi
- Institute of Functional Nano and Soft Materials (FUNSOM) , Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices , Joint International Research Laboratory of Carbon-based Functional Materials and Devices , Soochow University , Suzhou , Jiangsu Province 215123 , China . ;
| | - Rui Lv
- Institute of Functional Nano and Soft Materials (FUNSOM) , Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices , Joint International Research Laboratory of Carbon-based Functional Materials and Devices , Soochow University , Suzhou , Jiangsu Province 215123 , China . ;
| | - Fuzhong Ouyang
- Institute of Functional Nano and Soft Materials (FUNSOM) , Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices , Joint International Research Laboratory of Carbon-based Functional Materials and Devices , Soochow University , Suzhou , Jiangsu Province 215123 , China . ;
| | - Shawn S C Li
- Department of Biochemistry , Western University , London , Ontario N6A 5C1 , Canada
| | - Jun Zhong
- Institute of Functional Nano and Soft Materials (FUNSOM) , Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices , Joint International Research Laboratory of Carbon-based Functional Materials and Devices , Soochow University , Suzhou , Jiangsu Province 215123 , China . ;
| | - Jian Liu
- Institute of Functional Nano and Soft Materials (FUNSOM) , Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices , Joint International Research Laboratory of Carbon-based Functional Materials and Devices , Soochow University , Suzhou , Jiangsu Province 215123 , China . ;
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7
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Shi Y, Peng J, Meng X, Huang T, Zhang J, He H. Turn-on fluorescent detection of captopril in urine samples based on hydrophilic hydroxypropyl β-cyclodextrin polymer. Anal Bioanal Chem 2018; 410:7373-7384. [DOI: 10.1007/s00216-018-1343-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 08/15/2018] [Accepted: 08/28/2018] [Indexed: 12/01/2022]
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8
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Lin Z, Cai Z. Negative ion laser desorption/ionization time-of-flight mass spectrometric analysis of small molecules by using nanostructured substrate as matrices. MASS SPECTROMETRY REVIEWS 2018; 37:681-696. [PMID: 29509966 DOI: 10.1002/mas.21558] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Accepted: 02/08/2017] [Indexed: 06/08/2023]
Abstract
Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) is an excellent analytical technique for rapid and sensitive analysis of macromolecules such as polymers and proteins. However, the main drawback of MALDI-TOF MS is its difficulty to detect small molecules with mass below 700 Da because of the intensive interference from MALDI matrix in the low mass region. In recent years there has been considerable interest in developing matrix-free laser desorption/ionization by using nanostructured substrates to substitute the conventional organic matrices, which is often referred as surface-assisted laser desorption/ionization time-of-flight mass spectrometry (SALDI-TOF MS). Despite these attractive features, most of the current SALDI-TOF MS for the analysis of small molecules employ positive ion mode, which is subjected to produce multiple alkali metal adducts, and thus increases the complexity of the analysis. Different from the complicated adducts produced in positive ion mode, mass spectra obtained in negative ion mode are featured by deprotonated ion peaks without matrix interference, which simplifies the interpretation of mass spectra and detection of unknown. In this review, we critically survey recent advances in nanostructured substrates for negative ion LDI-TOF MS analysis of small molecules in the last 5 years. Special emphasis is placed on the preparation of the nanostructured substrates and the results achieved in negative ion SALDI-MS. In addition, a variety of promising applications including environmental, biological, and clinical analysis are introduced. The ionization mechanism of negative ionization is briefly discussed.
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Affiliation(s)
- Zian Lin
- Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, Department of Chemistry, Fuzhou University, Fuzhou, Fujian, P.R. China
- Partner State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, SAR, P.R. China
| | - Zongwei Cai
- Partner State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, SAR, P.R. China
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9
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Noh JY, Kim JI, Chang YW, Park JM, Song HW, Kang MJ, Pyun JC. Gold nanoislands chip for laser desorption/ionization (LDI) mass spectrometry. BIOCHIP JOURNAL 2017. [DOI: 10.1007/s13206-017-1310-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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10
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Hosu IS, Sobaszek M, Ficek M, Bogdanowicz R, Drobecq H, Boussekey L, Barras A, Melnyk O, Boukherroub R, Coffinier Y. Carbon nanowalls: a new versatile graphene based interface for the laser desorption/ionization-mass spectrometry detection of small compounds in real samples. NANOSCALE 2017; 9:9701-9715. [PMID: 28675223 DOI: 10.1039/c7nr01069a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Carbon nanowalls, vertically aligned graphene nanosheets, attract attention owing to their tunable band gap, high conductivity, high mechanical robustness, high optical absorbance and other remarkable properties. In this paper, we report for the first time the use of hydrophobic boron-doped carbon nanowalls (CNWs) for laser desorption/ionization of small compounds and their subsequent detection by mass spectrometry (LDI-MS). The proposed method offers sensitive detection of various small molecules in the absence of an organic matrix. The CNWs were grown by microwave plasma enhanced chemical vapor deposition (MW-PECVD), using a boron-carbon gas flow ratio of 1200 in H2/CH4 plasma, on silicon <100> wafer. The hydrophobicity of the surface offers a straightforward MS sample deposition, consisting of drop casting solutions of analytes and drying in air. Limits of detection in the picomolar and femtomolar ranges (25 fmol μL-1 for neurotensin) were achieved for different types of compounds (fatty acids, lipids, metabolites, saccharides and peptides) having clinical or food industry applications. This rapid and sensitive procedure can also be used for quantitative measurements without internal standards with RSDs <19%, as in the case of glucose in aqueous solutions (LOD = 0.32 ± 0.02 pmol), blood serum or soft drinks. Moreover, melamine (63 ± 8.19 ng μL-1), a toxic compound, together with creatinine and paracetamol, was detected in urine samples, while lecithin was detected in food supplements.
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Affiliation(s)
- I S Hosu
- Univ. Lille, CNRS, Centrale Lille, ISEN, Univ. Valenciennes, IEMN, UMR CNRS 8520, Avenue Poincaré, BP 60069, 59652 Villeneuve d'Ascq, France.
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11
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Xiao SJ, Zhao XJ, Chu ZJ, Xu H, Liu GQ, Huang CZ, Zhang L. New Off-On Sensor for Captopril Sensing Based on Photoluminescent MoO x Quantum Dots. ACS OMEGA 2017; 2:1666-1671. [PMID: 31457531 PMCID: PMC6640937 DOI: 10.1021/acsomega.7b00088] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Accepted: 04/11/2017] [Indexed: 05/27/2023]
Abstract
Molybdenum oxide nanomaterials have recently attracted widespread attention for their unique optical properties and catalytic performance. However, until now, there is little literature on the application of photoluminescent molybdenum oxide nanomaterials in biological and pharmaceutical sensing. Herein, photoluminescent molybdenum oxide quantum dots (MoO x QDs) were synthesized via a facile method, and then, the synthesized MoO x QDs were further applied as a new type of photoluminescent probe to design a new off-on sensor for captopril (Cap) determination on the basis of the fact that the quenched photoluminescence of MoO x QDs by Cu2+ was restored with Cap through specific interaction between the thiol group of Cap and Cu2+. Under optimal conditions, the restored photoluminescence intensity showed a good linear relationship with the content of Cap, ranging from 1.0 to 150.0 μM, with a limit of detection of 0.51 μM (3σ/k). Additionally, the content of Cap in pharmaceutical samples was successfully detected with the newly developed off-on sensor, and the recoveries were 99.4-101.7%, which suggest that the present off-on sensor has a high accuracy.
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Affiliation(s)
- Sai Jin Xiao
- School
of Chemistry, Biology and Material Science and Jiangxi Key Laboratory of Mass
Spectrometry and Instrumentation, East China
University of Technology (ECUT), Nanchang 330013, Jiangxi
Province, China
| | - Xiao Jing Zhao
- School
of Chemistry, Biology and Material Science and Jiangxi Key Laboratory of Mass
Spectrometry and Instrumentation, East China
University of Technology (ECUT), Nanchang 330013, Jiangxi
Province, China
| | - Zhao Jun Chu
- School
of Chemistry, Biology and Material Science and Jiangxi Key Laboratory of Mass
Spectrometry and Instrumentation, East China
University of Technology (ECUT), Nanchang 330013, Jiangxi
Province, China
| | - Han Xu
- School
of Chemistry, Biology and Material Science and Jiangxi Key Laboratory of Mass
Spectrometry and Instrumentation, East China
University of Technology (ECUT), Nanchang 330013, Jiangxi
Province, China
| | - Guo Qing Liu
- School
of Chemistry, Biology and Material Science and Jiangxi Key Laboratory of Mass
Spectrometry and Instrumentation, East China
University of Technology (ECUT), Nanchang 330013, Jiangxi
Province, China
| | - Cheng Zhi Huang
- School
of Chemistry, Biology and Material Science and Jiangxi Key Laboratory of Mass
Spectrometry and Instrumentation, East China
University of Technology (ECUT), Nanchang 330013, Jiangxi
Province, China
- College
of Pharmaceutical Sciences, Southwest University, Chongqing 400715, China
| | - Li Zhang
- College
of Chemistry, Nanchang University, Nanchang 330031, Jiangxi Province, China
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12
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Headspace single-drop microextraction coupled to microchip-photothermal lens microscopy for highly sensitive determination of captopril in human serum and pharmaceuticals. Mikrochim Acta 2017. [DOI: 10.1007/s00604-017-2266-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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13
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Shokoufi N, Abbasi-Ahd A, Kargosha K. Laser induced thermal lens microscopy for highly sensitive determination of captopril. APPLIED OPTICS 2017; 56:E58-E63. [PMID: 28414342 DOI: 10.1364/ao.56.000e58] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this work, a combined flow injection-photo thermal lens microscopy (FI-PTLM) system was used for highly sensitive determination of captopril as an angiotensin-converting enzyme inhibitor. Captopril has no absorption in the visible range, but due to its thiol group could interact with gold nanoparticles (GNPs). GNPs, because of their surface plasmon resonance (SPR), have absorption in the visible range, but their interaction with a low concentration of captopril shows no effective change in UV-Vis spectrophotometry because their aggregation is slight. On the contrary, at the same condition, the PTLM with a visible light source enables sensitive measurement of this compound. The thiol group of captopril binds to the surface of GNPs and decreases the SPR. At the optimum condition in the focal volume of 2.68 fL (f=10-15), the obtained range of linearity was 50-800 nM. The developed method was successfully applied for the determination of captopril in human serum and pharmaceutical samples.
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14
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Wu CY, Lee KC, Kuo YL, Chen YC. Revisiting the quantitative features of surface-assisted laser desorption/ionization mass spectrometric analysis. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2016; 374:rsta.2015.0379. [PMID: 27644973 PMCID: PMC5031644 DOI: 10.1098/rsta.2015.0379] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 05/23/2016] [Indexed: 06/06/2023]
Abstract
Surface-assisted laser desorption/ionization (SALDI) coupled with mass spectrometry (MS) is frequently used to analyse small organics owing to its clean background. Inorganic materials can be used as energy absorbers and the transfer medium to facilitate the desorption/ionization of analytes; thus, they are used as SALDI-assisting materials. Many studies have demonstrated the usefulness of SALDI-MS in quantitative analysis of small organics. However, some characteristics occurring in SALDI-MS require certain attention to ensure the reliability of the quantitative analysis results. The appearance of a coffee-ring effect in SALDI sample preparation is the primary factor that can affect quantitative SALDI-MS analysis results. However, to the best of our knowledge, there are no reports relating to quantitative SALDI-MS analysis that discuss or consider this effect. In this study, the coffee-ring effect is discussed using nanoparticles and nanostructured substrates as SALDI-assisting materials to show how this effect influences SALDI-MS analysis results. Potential solutions for overcoming the existing problems are also suggested.This article is part of the themed issue 'Quantitative mass spectrometry'.
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Affiliation(s)
- Ching-Yi Wu
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu 300, Taiwan
| | - Kai-Chieh Lee
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu 300, Taiwan
| | - Yen-Ling Kuo
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu 300, Taiwan
| | - Yu-Chie Chen
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu 300, Taiwan
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15
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Abdelhamid HN, Wu HF. Gold nanoparticles assisted laser desorption/ionization mass spectrometry and applications: from simple molecules to intact cells. Anal Bioanal Chem 2016; 408:4485-502. [DOI: 10.1007/s00216-016-9374-6] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2015] [Revised: 11/29/2015] [Accepted: 01/28/2016] [Indexed: 01/05/2023]
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16
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Gopal J, Muthu M, Chun SC, Wu HF. State-of-the-art nanoplatform-integrated MALDI-MS impacting resolutions in urinary proteomics. Proteomics Clin Appl 2015; 9:469-81. [PMID: 25736343 DOI: 10.1002/prca.201400182] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Revised: 12/26/2014] [Accepted: 02/26/2015] [Indexed: 12/17/2022]
Abstract
Urine proteomics has become a subject of interest, since it has led to a number of breakthroughs in disease diagnostics. Urine contains information not only from the kidney and the urinary tract but also from other organs, thus urinary proteome analysis allows for identification of biomarkers for both urogenital and systemic diseases. The following review gives a brief overview of the analytical techniques that have been in practice for urinary proteomics. MALDI-MS technique and its current application status in this area of clinical research have been discussed. The review comments on the challenges facing the conventional MALDI-MS technique and the upgradation of this technique with the introduction of nanotechnology. This review projects nano-based techniques such as nano-MALDI-MS, surface-assisted laser desorption/ionization, and nanostructure-initiator MS as the platforms that have the potential in trafficking MALDI-MS from the lab to the bedside.
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Affiliation(s)
- Judy Gopal
- Department of Molecular Biotechnology, Konkuk University, Seoul, Korea
| | - Manikandan Muthu
- Department of Molecular Biotechnology, Konkuk University, Seoul, Korea
| | - Se-Chul Chun
- Department of Molecular Biotechnology, Konkuk University, Seoul, Korea
| | - Hui-Fen Wu
- Department of Chemistry, National Sun Yat-Sen University, Kaohsiung, Taiwan.,School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan.,Institute of Medical Science and Technology, National Sun Yat-Sen University, Kaohsiung, Taiwan.,Doctoral Degree Program in Marine Biotechnology, National Sun Yat-Sen University and Academia Sinica, Kaohsiung, Taiwan.,Center for Nanosciences and Nanotechnology, National Sun Yat-Sen University, Kaohsiung, Taiwan
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17
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Silina YE, Koch M, Volmer DA. Influence of surface melting effects and availability of reagent ions on LDI-MS efficiency after UV laser irradiation of Pd nanostructures. JOURNAL OF MASS SPECTROMETRY : JMS 2015; 50:578-585. [PMID: 25800194 DOI: 10.1002/jms.3564] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Revised: 12/09/2014] [Accepted: 12/10/2014] [Indexed: 06/04/2023]
Abstract
In this study, the influence of surface morphology, reagent ions and surface restructuring effects on atmospheric pressure laser desorption/ionization (LDI) for small molecules after laser irradiation of palladium self-assembled nanoparticular (Pd-NP) structures has been systematically studied. The dominant role of surface morphology during the LDI process, which was previously shown for silicon-based substrates, has not been investigated for metal-based substrates before. In our experiments, we demonstrated that both the presence of reagent ions and surface reorganization effects--in particular, melting--during laser irradiation was required for LDI activity of the substrate. The synthesized Pd nanostructures with diameters ranging from 60 to 180 nm started to melt at similar temperatures, viz. 890-898 K. These materials exhibited different LDI efficiencies, however, with Pd-NP materials being the most effective surface in our experiments. Pd nanostructures of diameters >400-800 nm started to melt at higher temperatures, >1000 K, making such targets more resistant to laser irradiation, with subsequent loss of LDI activity. Our data demonstrated that both melting of the surface structures and the presence of reagent ions were essential for efficient LDI of the investigated low molecular weight compounds. This dependence of LDI on melting points was exploited further to improve the performance of Pd-NP-based sampling targets. For example, adding sodium hypophosphite as reducing agent to Pd electrolyte solutions during synthesis lowered the melting points of the Pd-NP materials and subsequently gave reduced laser fluence requirements for LDI.
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Affiliation(s)
- Yuliya E Silina
- Leibniz Institute of New Materials (INM), Saarbrücken, Germany; Institute of Bioanalytical Chemistry, Saarland University, Saarbrücken, Germany
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Lin Z, Zheng J, Bian W, Cai Z. CuFe2O4 magnetic nanocrystal clusters as a matrix for the analysis of small molecules by negative-ion matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. Analyst 2015; 140:5287-94. [DOI: 10.1039/c5an00625b] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
CuFe2O4 MNCs were proposed as a new matrix for negative ion MALDI-TOF MS, which exhibited interference-free background, high salt tolerance and good reproducibility for analysis of small molecules.
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Affiliation(s)
- Zian Lin
- Partner State Key Laboratory of Environmental and Biological Analysis
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- P. R. China
| | - Jiangnan Zheng
- Ministry of Education Key Laboratory of Analysis and Detection for Food Safety
- College of Chemistry
- Fuzhou University
- Fuzhou
- China
| | - Wei Bian
- Partner State Key Laboratory of Environmental and Biological Analysis
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- P. R. China
| | - Zongwei Cai
- Partner State Key Laboratory of Environmental and Biological Analysis
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- P. R. China
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Wang CW, Chen WT, Chang HT. Quantification of saccharides in honey samples through surface-assisted laser desorption/ionization mass spectrometry using HgTe nanostructures. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2014; 25:1247-1252. [PMID: 24744213 DOI: 10.1007/s13361-014-0886-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Revised: 03/02/2014] [Accepted: 03/04/2014] [Indexed: 06/03/2023]
Abstract
Quantification of monosaccharides and disaccharides in five honey samples through surface-assisted laser desorption/ionization mass spectrometry (SALDI-MS) using HgTe nanostructures as the matrix and sucralose as an internal standard has been demonstrated. Under optimal conditions (1× HgTe nanostructure, 0.2 mM ammonium citrate at pH 9.0), the SALDI-MS approach allows detection of fructose and maltose at the concentrations down to 15 and 10 μM, respectively. Without conducting tedious sample pretreatment and separation, the SALDI-MS approach allows determination of the contents of monosaccharides and disaccharides in honey samples within 30 min, with reproducibility (relative standard deviation <15%). Unlike only sodium adducts of standard saccharides detected, sodium adducts and potassium adducts with differential amounts have been found among various samples, showing different amounts of sodium and potassium ions in the honey samples. The SALDI-MS data reveal that the contents of monosaccharides and disaccharides in various honey samples are dependent on their nectar sources. In addition to the abundant amounts of monosaccharides and disaccharides, oligosaccharides in m/z range of 650 - 2700 are only detected in pomelo honey. Having advantages of simplicity, rapidity, and reproducibility, this SALDI-MS holds great potential for the analysis of honey samples.
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Affiliation(s)
- Chia-Wei Wang
- Department of Chemistry, National Taiwan University, Taipei, Taiwan
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Cho E, Ahn M, Kim YH, Kim J, Kim S. Protons are one of the limiting factors in determining sensitivity of nano surface-assisted (+)-mode LDI MS analyses. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2013; 24:1489-1492. [PMID: 23955002 DOI: 10.1007/s13361-013-0713-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2013] [Revised: 07/01/2013] [Accepted: 07/12/2013] [Indexed: 06/02/2023]
Abstract
A proton source employing a nanostructured gold surface for use in (+)-mode laser desorption ionization mass spectrometry (LDI-MS) was evaluated. Analysis of perdeuterated polyaromatic hydrocarbon compound dissolved in regular toluene, perdeuterated toluene, and deuterated methanol all showed that protonated ions were generated irregardless of solvent system. Therefore, it was concluded that residual water on the surface of the LDI plate was the major source of protons. The fact that residual water remaining after vacuum drying was the source of protons suggests that protons may be the limiting reagent in the LDI process and that overall ionization efficiency can be improved by incorporating an additional proton source. When extra proton sources, such as thiolate compounds and/or citric acid, were added to a nanostructured gold surface, the protonated signal abundance increased. These data show that protons are one of the limiting components in (+)-mode LDI MS analyses employing nanostructured gold surfaces. Therefore, it has been suggested that additional efforts are required to identify compounds that can act as proton donors without generating peaks that interfere with mass spectral interpretation.
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Affiliation(s)
- Eunji Cho
- Department of Chemistry, Kyungpook National University, Daegu, 702-701, Republic of Korea
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21
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Roy P, Periasamy AP, Liang CT, Chang HT. Synthesis of graphene-ZnO-Au nanocomposites for efficient photocatalytic reduction of nitrobenzene. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:6688-95. [PMID: 23701390 DOI: 10.1021/es400422k] [Citation(s) in RCA: 92] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
A simple hydrothermal method of preparing highly photocatalytic graphene-ZnO-Au nanocomposites (G-ZnO-Au NCs) has been developed. Zinc acetate and graphene oxide are reduced by catechin to form graphene-zinc oxide nanospheres (G-ZnO NSs; average diameter of (45.3 ± 3.7) nm) in the presence of ethylenediamine (EDA) as a stabilizing agent and gold nanorods (Au NRs) at 300 °C for 2 h. Then Au NRs are deposited onto as-formed G-ZnO NSs to form G-ZnO-Au NCs. Upon ultraviolet light activation, G-ZnO-Au NCs (4 mg mL(-1)) in methanol generates electron-hole pairs. Methanol (hydroxyl group) assists in trapping holes, enabling photogenerated electrons to catalyze reduction of nitrobenzene (NB) to aniline with a yield of 97.8% during a reaction course of 140 min. The efficiency of G-ZnO-Au NCs is 3.5- and 4.5-fold higher than those provided by commercial TiO2 and ZnO NSs, respectively. Surface assisted laser desorption/ionization mass spectrometry has been for the first time applied to detect the intermediates (nitrosobenzene and phenylhydroxylamine) and major product (aniline) of NB through photoelectrocatalytic or photocatalytic reactions. The result reveals that the reduction of NB to aniline is through nitrosobenzene to phenylhydroxylamine in the photoelectrocatalytic reaction, while via nitrosobenzene directly in the photocatalytic reaction. G-ZnO-Au NC photocatalyst holds great potential in removal of organic pollutants like NB and in the production of aniline.
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Affiliation(s)
- Prathik Roy
- Department of Chemistry, National Taiwan University, 1 Section 4, Roosevelt Road, Taipei 106, Taiwan
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1-Naphthylhydrazine hydrochloride: A new matrix for the quantification of glucose and homogentisic acid in real samples by MALDI-TOF MS. Clin Chim Acta 2013; 420:94-8. [DOI: 10.1016/j.cca.2012.10.015] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2012] [Accepted: 10/09/2012] [Indexed: 11/24/2022]
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23
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Silina YE, Volmer DA. Nanostructured solid substrates for efficient laser desorption/ionization mass spectrometry (LDI-MS) of low molecular weight compounds. Analyst 2013; 138:7053-65. [DOI: 10.1039/c3an01120h] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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24
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Chen WT, Chang HT. Tea Identification through Surface-Assisted Laser Desorption/Ionization Mass Spectrometry. ACTA ACUST UNITED AC 2013. [DOI: 10.4236/ijamsc.2013.11003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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25
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Jin JM, Choi S, Kim YH, Choi MH, Kim J, Kim S. Evaluation of nanoporous gold with controlled surface structures for laser desorption ionization (LDI) analysis: surface area versus LDI signal intensity. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2012; 23:1450-1453. [PMID: 22825744 DOI: 10.1007/s13361-012-0439-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2012] [Revised: 06/19/2012] [Accepted: 06/24/2012] [Indexed: 06/01/2023]
Abstract
The structural effect of a nanoporous gold (NPG) surface on the signal intensities of laser desorption ionization-mass spectrometry (LDI-MS) were investigated using NPG surfaces with controlled structures. The relationship between surface area and LDI efficiency was compared and evaluated. Comparisons between bare flat gold and NPG surfaces show that nanostructures increased LDI efficiency. We also found that the LDI signal decreased with increasing depth of nanoporous layers, thus increasing the surface area. This result agrees with a previous report (Shin J. A. et al., J. Am. Soc. Mass Spectrom. 2010, 21, 989) in which the LDI efficiency of small molecules decreased for ZnO wires with longer lengths. This observation was explained by the penetration and deposition of samples into locations inaccessible to photons because of structural screening. The LDI-MS analysis of oils with NPG surfaces (but without matrix) showed the same trend whereby the NPG with about a 200 nm depth of porous area showed the highest sensitivity. This study clearly shows that the active surface area for solution chemistry can differ from LDI-MS and that NPGs can function as a substrate for LDI oil analysis.
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Affiliation(s)
- Jang Mi Jin
- Department of Chemistry, Kyungpook National University, Daegu, Korea
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Chen R, Chen S, Xiong C, Ding X, Wu CC, Chang HC, Xiong S, Nie Z. N-(1-naphthyl) ethylenediamine dinitrate: a new matrix for negative ion MALDI-TOF MS analysis of small molecules. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2012; 23:1454-1460. [PMID: 22711516 DOI: 10.1007/s13361-012-0421-z] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2012] [Revised: 05/13/2012] [Accepted: 05/15/2012] [Indexed: 06/01/2023]
Abstract
An organic salt, N-(1-naphthyl) ethylenediamine dinitrate (NEDN), with rationally designed properties of a strong UV absorbing chromophore, hydrogen binding and nitrate anion donors, has been employed as a matrix to analyze small molecules (m/z < 1000) such as oligosaccharides, peptides, metabolites and explosives using negative ion matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS). Compared with conventional matrixes such as α-cyano-4-hydroxycinnamic acid (CCA) and 2,5-dihydroxybenzoic acid (DHB), NEDN provides a significant improvement in detection sensitivity and yields very few matrix-associated fragment and cluster ions interfering with MS analysis. For low-molecular-weight saccharides, the lowest detection limit achieved ranges from 500 amol to 5 pmol, depending on the molecular weight and the structure of the analytes. Additionally, the mass spectra in the lower mass range (m/z < 200) consist of only nitrate and nitric acid cluster ions, making the matrix particularly useful for structural identification of oligosaccharides by post-source decay (PSD) MALDI-MS. Such a characteristic is illustrated by using maltoheptaose as a model system. This work demonstrates that NEDN is a novel negative ion-mode matrix for MALDI-MS analysis of small molecules with nitrate anion attachment.
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Affiliation(s)
- Rui Chen
- Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, The Chinese Academy of Sciences, Beijing, China
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Lee J, Lee J, Chung TD, Yeo WS. Nanoengineered micro gold shells for LDI-TOF analysis of small molecules. Anal Chim Acta 2012; 736:1-6. [DOI: 10.1016/j.aca.2012.05.040] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2012] [Revised: 05/18/2012] [Accepted: 05/21/2012] [Indexed: 11/30/2022]
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Chen WT, Chiang CK, Lee CH, Chang HT. Using surface-assisted laser desorption/ionization mass spectrometry to detect proteins and protein-protein complexes. Anal Chem 2012; 84:1924-30. [PMID: 22264081 DOI: 10.1021/ac202883q] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
In this study, we combined surface-assisted laser desorption/ionization mass spectrometry (SALDI-MS) with HgTe nanostructures as matrix for the detection of several proteins (α1-antitrypsin, trypsin, IgG, protein G) and their complexes. We investigated the effects of several parameters (the concentration and nature of surfactants and metal ions, the pH, and concentration of the analytes in the sample matrixes) on the sensitivity of the detection of these proteins and their complexes. The presence of stabilizing Brij 76 surfactant and Zn(II) ions allowed the detection of weak protein complexes, such as α1-antitrypsin-trypsin and IgG-protein G complexes, at the picomole level. We observed multiply charged states at m/z 72,160 ([α1-antitrypsin + trypsin + H](+)) and 86,585 ([IgG + protein G + 2H](2+)) for the α1-antitrypsin-trypsin and IgG-protein G complexes, respectively. To the best of our knowledge, detection of weak protein complexes and determination of their stoichiometry have not been demonstrated previously when a combination of SALDI-MS and nanostructures were used. This simple and reproducible SALDI-MS approach using HgTe nanostructures holds great potential for the detection of other proteins and their complexes.
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Affiliation(s)
- Wen-Tsen Chen
- Department of Chemistry, National Taiwan University, Taipei, Taiwan
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29
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Huang MF, Chang HT. Detection of carbohydrates using surface-assisted laser desorption/ionization mass spectrometry with HgTe nanostructures. Chem Sci 2012. [DOI: 10.1039/c2sc01066f] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
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Kuzema PA. Small-molecule analysis by surface-assisted laser desorption/ionization mass spectrometry. JOURNAL OF ANALYTICAL CHEMISTRY 2011. [DOI: 10.1134/s1061934811130065] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Chen WT, Tomalová I, Preisler J, Chang HT. Analysis of Biomolecules through Surface-Assisted Laser, Desorption/Ionization Mass Spectrometry Employing Nanomaterials. J CHIN CHEM SOC-TAIP 2011. [DOI: 10.1002/jccs.201190120] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Automated determination of total captopril in urine by liquid chromatography with post-column derivatization coupled to on-line solid phase extraction in a sequential injection manifold. Talanta 2011; 88:561-6. [PMID: 22265541 DOI: 10.1016/j.talanta.2011.11.034] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2011] [Revised: 11/04/2011] [Accepted: 11/13/2011] [Indexed: 11/22/2022]
Abstract
The present study reports a new liquid chromatographic (HPLC) method for the determination of the anti-hypertension drug captopril (CAP) in human urine. After its separation from the sample matrix in a reversed phase HPLC column, CAP reacts with the thiol-selective reagent ethyl-propiolate (EP) in a post-column configuration and the formed thioacrylate derivative is detected at 285 nm. Automated 4-fold preconcentration of the analyte prior to analysis was achieved by an on-line solid phase extraction (SPE) step using a sequential injection (SI) manifold. The Oasis HLB SPE cartridges offered quantitative recoveries and effective sample cleaning by applying a simple SPE protocol. The limits of detection and quantitation were 10 μg L(-1) and 35 μg L(-1) respectively. The percent recoveries for the analysis of human urine samples ranged between 90 and 96% and 95 and 104% using aqueous and matrix matched calibration curves respectively.
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Kuo TR, Chen JS, Chiu YC, Tsai CY, Hu CC, Chen CC. Quantitative analysis of multiple urinary biomarkers of carcinoid tumors through gold-nanoparticle-assisted laser desorption/ionization time-of-flight mass spectrometry. Anal Chim Acta 2011; 699:81-6. [DOI: 10.1016/j.aca.2011.05.012] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2011] [Revised: 05/06/2011] [Accepted: 05/08/2011] [Indexed: 10/18/2022]
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34
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Gold nanomaterials as a new tool for bioanalytical applications of laser desorption ionization mass spectrometry. Anal Bioanal Chem 2011; 402:601-23. [DOI: 10.1007/s00216-011-5120-2] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2011] [Revised: 05/13/2011] [Accepted: 05/17/2011] [Indexed: 10/18/2022]
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35
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Chiang CK, Chen WT, Chang HT. Nanoparticle-based mass spectrometry for the analysis of biomolecules. Chem Soc Rev 2011; 40:1269-81. [DOI: 10.1039/c0cs00050g] [Citation(s) in RCA: 265] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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Nayak R, Knapp DR. Matrix-free LDI mass spectrometry platform using patterned nanostructured gold thin film. Anal Chem 2010; 82:7772-8. [PMID: 20799713 PMCID: PMC2939187 DOI: 10.1021/ac1017277] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A novel matrix-free LDI MS platform using a thin film of patterned nanostructured gold, capped with methyl- and carboxy-terminated self-assembled monolayers (SAMs) is presented. Calibration on the matrix-free LDI surface was performed using a peptide standard mixture available for MALDI analysis. MS analysis for limit of detection was performed using angiotensin I peptide. Peptide fragments from standard protein digests of bovine serum albumin, bovine catalase, and bovine lactoperoxidase were used to carry out peptide mass fingerprinting analysis. Sequence coverage of each protein digest and the number of detected peptide fragments were compared with conventional MALDI MS on a standard MALDI plate. Versatility of the nanostructured gold LDI substrate is illustrated by performing MS analysis on a protein digest using different enzymes and by small molecule MS analysis.
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Affiliation(s)
- Ranu Nayak
- MUSC Proteomics Center, Medical University of South Carolina, Charleston, SC 29425
| | - Daniel R Knapp
- MUSC Proteomics Center, Medical University of South Carolina, Charleston, SC 29425
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ARAKAWA R, KAWASAKI H. Functionalized Nanoparticles and Nanostructured Surfaces for Surface-Assisted Laser Desorption/Ionization Mass Spectrometry. ANAL SCI 2010; 26:1229-40. [DOI: 10.2116/analsci.26.1229] [Citation(s) in RCA: 127] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Ryuichi ARAKAWA
- Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University
| | - Hideya KAWASAKI
- Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University
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