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Luo Y, Ma S, Zhang J, Zhang Q, Zhang Y, Mao J, Yuan H, Ouyang G, Zhang S, Zhao W. Developing a novel strategy for fabricating matrix film to assess the distribution of potassium perfluorooctanic sulfonate by matrix-assisted laser desorption/ionization mass spectrometry imaging. Anal Chim Acta 2024; 1303:342528. [PMID: 38609267 DOI: 10.1016/j.aca.2024.342528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 03/03/2024] [Accepted: 03/24/2024] [Indexed: 04/14/2024]
Abstract
Matrix deposition plays a critical role in image quality of matrix-assisted laser desorption/ionization mass spectrometry imaging (MALDI-MSI). To improve the ionization efficiency and overcome the limitation of traditional matrix deposition methods in the face of difficult-to-sublimate or difficult-to-dissolve matrix, covalent organic frameworks (COFs) named COF-DhaTab was successfully synthesized and firstly used as matrix film. It was fabricated by imprinting of sieved COF-DhaTab powder on the surface of a double-sided adhesive tape. Outstanding reproducibility and uniformity of COF-DhaTab film were demonstrated by relative standard deviation (RSD) within 8.37% and 7.71% from dot-to-dot and plate-to-plate, respectively. With the introduction of double-sided adhesive tape, water contact angle (WCA) of COF-DhaTab film increased from 55° to 141°, resulting in significant suppression of analyte diffusion. Moreover, the intensity of potassium perfluorooctanic sulfonate (PFOS, C8F17SO3-, m/z 498.93) was 9.3 × 105, more than six hundred times higher than that using DHB matrix. This enhancement was attributed to the rough surface and multiple branches of the synthesized COF-DhaTab. To verify the ability of COF-DhaTab film as substrate, the spatial distribution of PFOS in zebrafish, rat liver and kidney tissues was explored. Superior imaging capability was displayed with high-spatial resolution and reliable location distribution. These results not only demonstrate the outstanding ability of COF-DhaTab as matrix for MALDI-MS and MALDI-MSI, but also provide a facile approach for fabrication of novel matrix films for MALDI-MSI.
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Affiliation(s)
- Yake Luo
- College of Chemistry, Zhengzhou University, Zhengzhou, 450001, China
| | - Shanshan Ma
- College of Chemistry, Zhengzhou University, Zhengzhou, 450001, China
| | - Jianxun Zhang
- College of Chemistry, Zhengzhou University, Zhengzhou, 450001, China; The Key Laboratory of Tobacco Flavor Basic Research of CNTC, Zhengzhou Tobacco Research Institute, Zhengzhou, 450001, China
| | - Qidong Zhang
- College of Chemistry, Zhengzhou University, Zhengzhou, 450001, China; The Key Laboratory of Tobacco Flavor Basic Research of CNTC, Zhengzhou Tobacco Research Institute, Zhengzhou, 450001, China
| | - Yanhao Zhang
- College of Ecology and Environment, Zhengzhou University, Zhengzhou, 450001, China.
| | - Jian Mao
- College of Chemistry, Zhengzhou University, Zhengzhou, 450001, China; The Key Laboratory of Tobacco Flavor Basic Research of CNTC, Zhengzhou Tobacco Research Institute, Zhengzhou, 450001, China
| | - Hang Yuan
- College of Chemistry, Zhengzhou University, Zhengzhou, 450001, China; College of Ecology and Environment, Zhengzhou University, Zhengzhou, 450001, China
| | - Gangfeng Ouyang
- College of Chemistry, Zhengzhou University, Zhengzhou, 450001, China; MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, China
| | - Shusheng Zhang
- College of Chemistry, Zhengzhou University, Zhengzhou, 450001, China; College of Ecology and Environment, Zhengzhou University, Zhengzhou, 450001, China
| | - Wuduo Zhao
- College of Chemistry, Zhengzhou University, Zhengzhou, 450001, China; College of Ecology and Environment, Zhengzhou University, Zhengzhou, 450001, China.
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Sun Q, Zhang S, Huang W, Wang R, Chen Z, Cai Z, Lin Z. 4-Mercaptobenzoic acid as a MALDI matrix for highly sensitive analysis of metals. Analyst 2021; 146:1543-1547. [PMID: 33565552 DOI: 10.1039/d1an00022e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
4-Mercaptobenzoic acid (MBA) is introduced as a matrix for laser desorption/ionization time-of-flight mass spectrometry (MS) analysis of metals, exhibiting matrix-interference-free background, greatly enhanced MS signal intensity, and excellent reproducibility. The developed method was successfully extended for the rapid screening and sensitive determination of ultratrace metals in fine particulate matter (PM2.5).
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Affiliation(s)
- Qianqian Sun
- Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China.
| | - Shasha Zhang
- Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China.
| | - Weini Huang
- Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China.
| | - Ran Wang
- Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China.
| | - Zihan Chen
- Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China.
| | - Zongwei Cai
- Partner State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, 224 Waterloo Road, Kowloon Tong, Hong Kong, SAR, P. R. China
| | - 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, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China.
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Nanoparticle-based surface assisted laser desorption ionization mass spectrometry: a review. Mikrochim Acta 2019; 186:682. [DOI: 10.1007/s00604-019-3770-5] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2019] [Accepted: 08/16/2019] [Indexed: 12/28/2022]
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Mernie EG, Tolesa LD, Lee MJ, Tseng MC, Chen YJ. Direct Oligosaccharide Profiling Using Thin-Layer Chromatography Coupled with Ionic Liquid-Stabilized Nanomatrix-Assisted Laser Desorption-Ionization Mass Spectrometry. Anal Chem 2019; 91:11544-11552. [DOI: 10.1021/acs.analchem.9b01241] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Elias Gizaw Mernie
- Institute of Chemistry, Academia Sinica, Taipei 115, Taiwan
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan
| | - Leta Deressa Tolesa
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan
| | - Ming-Jer Lee
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan
| | - Mei-Chun Tseng
- Institute of Chemistry, Academia Sinica, Taipei 115, Taiwan
- Department of Chemistry, Soochow University, Taipei 106, Taiwan
| | - Yu-Ju Chen
- Institute of Chemistry, Academia Sinica, Taipei 115, Taiwan
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
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Nano-Cellulose/MOF Derived Carbon Doped CuO/Fe₃O₄ Nanocomposite as High Efficient Catalyst for Organic Pollutant Remedy. NANOMATERIALS 2019; 9:nano9020277. [PMID: 30781506 PMCID: PMC6410010 DOI: 10.3390/nano9020277] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2019] [Revised: 02/07/2019] [Accepted: 02/11/2019] [Indexed: 02/06/2023]
Abstract
Metal–organic framework (MOF)-based derivatives are attracting increased interest in various research fields. In this study, nano-cellulose MOF-derived carbon-doped CuO/Fe3O4 nanocomposites were successfully synthesized via direct calcination of magnetic Cu-BTC MOF (HKUST-1)/Fe3O4/cellulose microfibril (CMF) composites in air. The morphology, structure, and porous properties of carbon-doped CuO/Fe3O4 nanocomposites were characterized using SEM, TEM, powder X-ray diffraction (PXRD), X-ray photoelectron spectroscopy (XPS), and vibrating sample magnetometry (VSM). The results show that the as-prepared nanocomposite catalyst is composed of Fe3O4, CuO, and carbon. Compared to the CuO/Fe3O4 catalyst from HKUST-1/Fe3O4 composite and CuO from HKUST-1, this carbon-doped CuO/Fe3O4 nanocomposite catalyst shows better catalytic efficiency in reduction reactions of 4-nitrophenol (4-NP), methylene blue (MB), and methyl orange (MO) in the presence of NaBH4. The enhanced catalytic performance of carbon-doped CuO/Fe3O4 is attributed to effects of carbon preventing the aggregation of CuO/Fe3O4 and providing high surface-to-volume ratio and chemical stability. Moreover, this nanocomposite catalyst is readily recoverable using an external magnet due to its superparamagnetic behavior. The recyclability/reuse of carbon-doped CuO/Fe3O4 was also investigated.
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Primadona I, Lai YH, Capangpangan RY, Obena RP, Tseng MC, Huang MF, Chang HT, Li ST, Wu CY, Chien WT, Lin CC, Wang YS, Chen YJ. Functionalized HgTe nanoparticles promote laser-induced solid phase ionization/dissociation for comprehensive glycan sequencing. Analyst 2018; 141:6093-6103. [PMID: 27722232 DOI: 10.1039/c6an00923a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Glycoconjugates are ubiquitously present and play a critical role in various biological processes. Due to their low stability and incredibly high degree of structural diversity, the structural characterization of glycan generally requires chemical derivatization and sophisticated instrumentation. Herein, we report a method for complicated glycan characterization in a single assay by employing 2,5-dihydroxybenzoic acid functionalized mercury telluride nanoparticles (HgTe@DHB NPs) as a dual ionization-dissociation element in matrix-assisted laser desorption/ionization mass spectrometry. Using a linear glycan, HgTe@DHB NPs promote laser-induced extensive and intense dissociation of the glycan, superior to HgTe microparticles and other inorganic nanoparticles (TiO2, ZnO, and Mn2O3 NPs). Abundant generation of diagnostic glycosidic (Y-, and B-type ions) and cross-ring cleavage (A-type ions) ions permits unambiguous determination of the composition, sequence, branching, and linkage of labile sialylated glycans. The general utility of this approach was demonstrated by the characterization of labile sialylated glycans and two sets of complicated isomeric glycans. This phenomenon was delineated further by investigating the NP's physico-chemical characteristics, revealing that their nanoscale-dependent thermodynamic properties, including UV absorption, photoelectron release dynamics and thermal energy, were the key to levitate temperature synergistically, thus inducing spontaneous glycan decomposition during the nanoparticle-assisted laser desorption-ionization process. Our results show that this "pseudo-MS/MS" obtained by HgTe@DHB can be beneficial for the analysis of biologically relevant and more complicated carbohydrates, without the need for chemical pre-derivatization and conventional tandem mass spectrometry.
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Affiliation(s)
- Indah Primadona
- Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan and Molecular Science and Technology Program, Taiwan International Graduate Program, Institute of Chemistry, Academia Sinica, Taiwan and Institute of Chemistry, Academia Sinica, Taipei, Taiwan. and Research Unit for Clean Technology, Indonesian Institute of Sciences, Bandung, Indonesia
| | - Yin-Hung Lai
- Genomics Research Center, Academia Sinica, Taipei, Taiwan.
| | - Rey Y Capangpangan
- Institute of Chemistry, Academia Sinica, Taipei, Taiwan. and Division of Chemistry, Caraga State University, Butuan city, Philippines
| | | | - Mei-Chun Tseng
- Institute of Chemistry, Academia Sinica, Taipei, Taiwan.
| | - Ming-Feng Huang
- Department of Chemistry, National Taiwan University, Taipei, Taiwan
| | - Huan-Tsung Chang
- Department of Chemistry, National Taiwan University, Taipei, Taiwan
| | - Shiou-Ting Li
- Genomics Research Center, Academia Sinica, Taipei, Taiwan.
| | - Chung-Yi Wu
- Genomics Research Center, Academia Sinica, Taipei, Taiwan.
| | - Wei-Ting Chien
- Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan
| | - Chun-Cheng Lin
- Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan
| | - Yi-Sheng Wang
- Genomics Research Center, Academia Sinica, Taipei, Taiwan.
| | - Yu-Ju Chen
- Institute of Chemistry, Academia Sinica, Taipei, Taiwan. and Department of Chemistry, National Taiwan University, Taipei, Taiwan
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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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Garcia MM, Wrobel K, Segovia ASR, Barrientos EY, Escobosa ARC, Serrano O, Aguilar FJA, Wrobel K. Application of MALDI-TOFMS Combined with Partial Least Square Regression for the Determination of Mercury and Copper in Canned Tuna, Using Dithizone as the Complexing Agent and Ag(I) as Internal Standard. FOOD ANAL METHOD 2018. [DOI: 10.1007/s12161-018-1272-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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10
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Nanoparticle assisted laser desorption/ionization mass spectrometry for small molecule analytes. Mikrochim Acta 2018; 185:200. [DOI: 10.1007/s00604-018-2687-8] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 01/18/2018] [Indexed: 12/14/2022]
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Mechanisms of Nanophase-Induced Desorption in LDI-MS. A Short Review. NANOMATERIALS 2017; 7:nano7040075. [PMID: 28368330 PMCID: PMC5408167 DOI: 10.3390/nano7040075] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Revised: 03/24/2017] [Accepted: 03/28/2017] [Indexed: 12/26/2022]
Abstract
Nanomaterials are frequently used in laser desorption ionization mass spectrometry (LDI-MS) as DI enhancers, providing excellent figures of merit for the analysis of low molecular weight organic molecules. In recent years, literature on this topic has benefited from several studies assessing the fundamental aspects of the ion desorption efficiency and the internal energy transfer, in the case of model analytes. Several different parameters have been investigated, including the intrinsic chemical and physical properties of the nanophase (chemical composition, thermal conductivity, photo-absorption efficiency, specific heat capacity, phase transition point, explosion threshold, etc.), along with morphological parameters such as the nanophase size, shape, and interparticle distance. Other aspects, such as the composition, roughness and defects of the substrate supporting the LDI-active nanophases, the nanophase binding affinity towards the target analyte, the role of water molecules, have been taken into account as well. Readers interested in nanoparticle based LDI-MS sub-techniques (SALDI-, SELDI-, NALDI- MS) will find here a concise overview of the recent findings in the specialized field of fundamental and mechanistic studies, shading light on the desorption ionization phenomena responsible of the outperforming MS data offered by these techniques.
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Hou J, Chen S, Cao C, Liu H, Xiong C, Zhang N, He Q, Song W, Nie Z. Application of flowerlike MgO for highly sensitive determination of lead via matrix-assisted laser desorption/ionization mass spectrometry. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2016; 30 Suppl 1:208-216. [PMID: 27539440 DOI: 10.1002/rcm.7637] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
RATIONALE Matrix-assisted laser desorption/ionization mass spectrometry (MALDI MS) is a high-throughput method to achieve fast and accurate identification of lead (Pb) exposure, but is seldom used because of low ionization efficiency and insufficient sensitivity. Nanomaterials applied in MS are a promising technique to overcome the obstacles of MALDI. METHODS Flowerlike MgO nanostructures are applied for highly sensitive lead profiling in real samples. They can be used in two ways: (a) MgO is mixed with N-naphthylethylenediamine dihydrochloride (NEDC) as a novel matrix MgO/NEDC; (b) MgO is applied as an absorbent to enrich Pb ions in very dilute solution. RESULTS The signal intensities of lead by MgO/NEDC were ten times higher than the NEDC matrix. It also shows superior anti-interference ability when analyzing 10 μmol/L Pb ions in the presence of organic substances or interfering metal ions. By applying MgO as adsorbent, the LOD of lead before enrichment is 1 nmol/L. Blood lead test can be achieved using this enrichment process. Besides, MgO can play the role of internal standard to achieve quantitative analysis. CONCLUSIONS Flowerlike MgO nanostructures were applied for highly sensitive lead profiling in real samples. The method is helpful to prevent Pb contamination in a wide range. Further, the combination of MgO with MALDI MS could inspire more nanomaterials being applied in highly sensitive profiling of pollutants. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Jian Hou
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Suming Chen
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Changyan Cao
- Beijing National Laboratory for Molecular Science, Laboratory of Molecular Nanostructures and Nanotechnology, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Huihui Liu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Caiqiao Xiong
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Ning Zhang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Qing He
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Weiguo Song
- Beijing National Laboratory for Molecular Science, Laboratory of Molecular Nanostructures and Nanotechnology, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Zongxiu Nie
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
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Hou J, Chen S, Zhang N, Liu H, Wang J, He Q, Wang J, Xiong S, Nie Z. Organic salt NEDC (N-naphthylethylenediamine dihydrochloride) assisted laser desorption ionization mass spectrometry for identification of metal ions in real samples. Analyst 2015; 139:3469-75. [PMID: 24842842 DOI: 10.1039/c4an00297k] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The significance of metals in life and their epidemiological effects necessitate the development of a direct, efficient, and rapid method of analysis. The matrix assisted laser desorption/ionization technique is on the horns of a dilemma of metal analysis as the conventional matrixes have high background in the low mass range. An organic salt, NEDC (N-naphthylethylenediamine dihydrochloride), is applied as a matrix for identification of metal ions in the negative ion mode in the present work. Sixteen metal ions, Ba(2+), Ca(2+), Cd(2+), Ce(3+), Co(2+), Cu(2+), Fe(3+), Hg(2+), K(+), Mg(2+), Mn(2+), Na(+), Ni(2+), Pb(2+), Sn(2+) and Zn(2+), in the form of their chloride-adducted clusters were systematically tested. Mass spectra can provide unambiguous identification through accurate mass-to-charge ratios and characteristic isotope patterns. Compared to ruthenium ICP standard solution, tris(2,2'-bipyridyl)dichlororuthenium(ii) (C30H24N6Cl2Ru) can form organometallic chloride adducts to discriminate from the inorganic ruthenium by this method. After evaluating the sensitivity for Ca, Cu, Mg, Mn, Pb and Zn and plotting their quantitation curves of signal intensity versus concentration, we determined magnesium concentration in lake water quantitatively to be 5.42 mg L(-1) using the standard addition method. There is no significant difference from the result obtained with ICP-OES, 5.8 mg L(-1). Human urine and blood were also detected to ascertain the multi-metal analysis ability of this strategy in complex samples. At last, we explored its applicability to tissue slice and visualized sodium and potassium distribution by mass spectrometry imaging in the normal Kunming mouse brain.
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Affiliation(s)
- Jian Hou
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
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Obena RP, Tseng MC, Primadona I, Hsiao J, Li IC, Capangpangan RY, Lu HF, Li WS, Chao I, Lin CC, Chen YJ. UV-activated multilayer nanomatrix provides one-step tunable carbohydrate structural characterization in MALDI-MS. Chem Sci 2015; 6:4790-4800. [PMID: 28717486 PMCID: PMC5502396 DOI: 10.1039/c5sc00546a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2015] [Accepted: 05/27/2015] [Indexed: 11/21/2022] Open
Abstract
The structure-specific fragmentation of gas-phase ions in tandem mass spectrometry among other techniques provides an efficient analytical method for confirming unknown analytes or for elucidating chemical structures. Using concentration-dependent UV-absorbing matrix-functionalized magnetic nanoparticles and matrix-assisted laser desorption-ionization mass spectrometry (MALDI MS), we developed a single-step pseudo-MS/MS approach for tunable ionization and fragmentation to facilitate structure determination. Without chemical derivatization, we have demonstrated that this approach successfully distinguished isomeric sets of di-, tri- and tetrasaccharides. Low concentration of nanomatrix provided an enhanced signal for accurate mass determination of the intact molecular ions of analytes present in the sample. In contrast, high concentration of nanomatrix induced extensive and unique fragmentation, including high-energy facile bond breakage (A- and X-type cross-ring cleavages), which facilitated the linkage and sequence characterization of oligosaccharides without conventional tandem mass spectrometric instrumentation. The practicality of this approach for complex sample analysis was evaluated by an oligosaccharide mixture, wherein molecular ions are unambiguously observed and signature product ions are distinguishable enough for molecular identification and isomer differentiation by this simple tunable approach. By probing the roles of the multilayer nanomatrix components: matrix (energy absorption), silane-coating (energy pooling and dissipation) and core Fe3O4 (fragmentation), a plausible energy transfer mechanism was proposed based on a computational study and photoelectron experiments. The differentiation of tri- and tetra-oligosaccharide shown in this study not only demonstrated the first step toward glycan characterization by nanoparticle-assisted MALDI-MS, but also shed some insight on the nanoparticle-mediated energy transfer dynamics behind our approach.
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Affiliation(s)
- Rofeamor P Obena
- Institute of Chemistry , Academia Sinica , Taipei , Taiwan
- Institute of Chemistry , University of the Philippines-Diliman , Quezon City , Philippines
| | - Mei-Chun Tseng
- Institute of Chemistry , Academia Sinica , Taipei , Taiwan
| | - Indah Primadona
- Department of Chemistry , National Tsing Hua University , Hsinchu , Taiwan .
- Molecular Science and Technology Program , Taiwan International Graduate Program , Institute of Chemistry , Academia Sinica , Taiwan
| | - Jun Hsiao
- Institute of Chemistry , Academia Sinica , Taipei , Taiwan
| | - I-Che Li
- Department of Chemistry , National Taiwan University , Taipei , Taiwan
| | - Rey Y Capangpangan
- Department of Chemistry , National Tsing Hua University , Hsinchu , Taiwan .
- Molecular Science and Technology Program , Taiwan International Graduate Program , Institute of Chemistry , Academia Sinica , Taiwan
| | - Hsiu-Fong Lu
- Institute of Chemistry , Academia Sinica , Taipei , Taiwan
| | - Wan-Sheung Li
- Institute of Chemistry , Academia Sinica , Taipei , Taiwan
| | - Ito Chao
- Institute of Chemistry , Academia Sinica , Taipei , Taiwan
| | - Chun-Cheng Lin
- Department of Chemistry , National Tsing Hua University , Hsinchu , Taiwan .
| | - Yu-Ju Chen
- Department of Chemistry , National Tsing Hua University , Hsinchu , Taiwan .
- Department of Chemistry , National Taiwan University , Taipei , Taiwan
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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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16
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Chiu WC, Huang CC. Combining Fibrinogen-Conjugated Gold Nanoparticles with a Cellulose Membrane for the Mass Spectrometry-Based Detection of Fibrinolytic-Related Proteins. Anal Chem 2013; 85:6922-9. [DOI: 10.1021/ac4013418] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
| | - Chih-Ching Huang
- School of Pharmacy,
College of
Pharmacy, Kaohsiung Medical University,
Kaohsiung 80708, Taiwan
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17
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Nakakoshi M, Tsubuki M, Funakoshi N, Nakajima H. New Type of Matrix for Analysis of Low Molecular Weight Compounds by MALDI-TOF MS. HETEROCYCLES 2012. [DOI: 10.3987/com-12-12438] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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18
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Affiliation(s)
- Francis P. Zamborini
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40292,
United States
| | - Lanlan Bao
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40292,
United States
| | - Radhika Dasari
- Department
of Chemistry and Biochemistry, University of Texas at Austin, Austin, Texas 78712, United States
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