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Wu YC, Zhang XW, Huang YC, Lu IC. Advancing carbohydrate quantification in MALDI mass spectrometry by the rapidly freeze-drying droplet (RFDD) method. Analyst 2024; 149:1766-1773. [PMID: 38372348 DOI: 10.1039/d3an02201c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2024]
Abstract
Quantitative carbohydrate analysis faces challenges in matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS), including insufficient sensitivity and inconsistent spatial distribution of ion intensity. This study introduces an innovative sample preparation approach, the Rapidly Freeze-Drying Droplet (RFDD) method, aimed at overcoming these challenges by enhancing the homogeneity of the sample morphology and signal intensity in MALDI. Compared to conventional preparation methods, the RFDD method reduces the laser energy threshold and demonstrates a remarkable increase in signal intensity for carbohydrates, facilitating the detection of high-molecular-weight polysaccharides (>10 kDa). The RFDD-prepared samples exhibit a uniformly distributed signal intensity that overcomes the 'sweet spot' issue in MALDI. The enhanced signal intensity and reproducibility lead to reliable quantitative analysis of carbohydrates, eliminating the need for expensive isotopic standards in each sample. A straightforward and accessible approach is presented for general laboratories, revolutionizing carbohydrate analysis in MALDI-MS.
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Affiliation(s)
- Yu-Cheng Wu
- Department of Chemistry, National Chung Hsing University, Taichung City 40227, Taiwan.
| | - Xin-Wen Zhang
- Department of Chemistry, National Chung Hsing University, Taichung City 40227, Taiwan.
| | - Yi-Ching Huang
- Department of Chemistry, National Chung Hsing University, Taichung City 40227, Taiwan.
| | - I-Chung Lu
- Department of Chemistry, National Chung Hsing University, Taichung City 40227, Taiwan.
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Zhu Y, Wang J, Zeng P, Fu C, Chen D, Jiang Y, Sun Y, Xie Z. Novel Ag-modified vanadate nanosheets for determination of small organic molecules with laser desorption ionization mass spectrometry. JOURNAL OF HAZARDOUS MATERIALS 2024; 464:132986. [PMID: 37979424 DOI: 10.1016/j.jhazmat.2023.132986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2023] [Revised: 10/26/2023] [Accepted: 11/09/2023] [Indexed: 11/20/2023]
Abstract
Laser desorption ionization mass spectrometry (LDI-MS) aroused intensive concerns for the merits of label-free and high-throughput analysis. Here, we designed a silver nanoparticles (AgNP)-modified indium vanadate nanosheets with doping samarium (AgNP@InVO4:Sm) nanosheets. The developed AgNP@InVO4:Sm nanosheets (AIVON) were synthesized based on the microemulsion-mediated solvothermal method and ultraviolet-assisted in situ formation of AgNP, then for the first time applied as a matrix in LDI-MS analysis. With the advantages including enhanced MS signal, little matrix-related background, high reproducibility, and good salt tolerance, AIVON exhibited much better prospect than non-modified indium vanadate nanosheets with doping samarium (IVON) and traditional organic matrix, thus allowing sensitive MS detection for a wide range of low-molecular-weight (LMW) molecules. Moreover, by coupling with headspace sampling thin-film microextraction (TFME), a kind of representative pollutant chlorophenols were identified and quantified via AIVON-assisted LDI-MS in environmental and biological samples. Volatile LMW pollutants could be preconcentrated after TFME, hence a sensitive and rapid assay with negligible sample matrix effect was realized by using AIVON-assisted LDI-MS. It is anticipated that this novel nano-matrix AIVON and the proposed TFME coupling detection strategy were of competitive merits for LDI-MS analysis in the fields of environment, biomedicine, and agriculture.
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Affiliation(s)
- Yanli Zhu
- School of Resources and Environment, Hunan University of Technology and Business, Changsha 410205, Hunan, PR China
| | - Jikai Wang
- Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Institute of Pharmacy & Pharmacology, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, PR China.
| | - Pengfei Zeng
- Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Institute of Pharmacy & Pharmacology, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, PR China
| | - Chengxiao Fu
- The First Affiliated Hospital, Department of Pharmacy, Hengyang Clinical Pharmacology Research Center, Hengyang Medical School, University of South China, Hengyang, 421001 Hunan, PR China
| | - Danjun Chen
- The First Affiliated Hospital, Department of Pharmacy, Hengyang Clinical Pharmacology Research Center, Hengyang Medical School, University of South China, Hengyang, 421001 Hunan, PR China
| | - Yuehua Jiang
- Department for Animal Husbandry & Aquaculture Products Quality Control, Hengyang Animal Husbandry and Aquaculture Affairs Center, Hengyang 421001, Hunan, PR China
| | - Yiyang Sun
- Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Institute of Pharmacy & Pharmacology, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, PR China
| | - Zhulan Xie
- Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Institute of Pharmacy & Pharmacology, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, PR China
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Zhang X, Dong Y, Wang Y, Zhang Z, Zhang X, Zhu JJ, Tian Y, Min Q. Quality Control of Mass-Encoded Nanodevices by Compartmented DNA Origami Frames for Precision Information Coding and Logic Mapping. Angew Chem Int Ed Engl 2024; 63:e202313446. [PMID: 38038595 DOI: 10.1002/anie.202313446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Revised: 11/29/2023] [Accepted: 12/01/2023] [Indexed: 12/02/2023]
Abstract
Encoded nanostructures afford an ideal platform carrying multi-channel signal components for multiplexed assay and information security. However, with the demand on exclusivity and reproducibility of coding signals, precise control on the structure and composition of nanomaterials featuring fully distinguishable signals remains challenging. By using the multiplexing capability of mass spectrometry (MS) and spatial addressability of DNA origami nanostructures, we herein propose a quality control methodology for constructing mass-encoded nanodevices (namely MNTs-TDOFs) in the scaffold of compartmented tetrahedral DNA origami frames (TDOFs), in which the arrangement and stoichiometry of four types of mass nanotags (MNTs) can be finely regulated and customized to generate characteristic MS patterns. The programmability of combinatorial MNTs and orthogonality of individual compartments allows further evolution of MNTs-TDOFs to static tagging agents and dynamic nanoprobes for labeling and sensing of multiple targets. More importantly, structure control at single TDOF level ensures the constancy of prescribed MS outputs, by which a high-capacity coding system was established for secure information encryption and decryption. In addition to the multiplexed outputs in parallel, the nanodevices could also map logic circuits with interconnected complexity and logic events of c-Met recognition and dimerization on cell surface for signaling regulation by MS interrogation.
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Affiliation(s)
- Xue Zhang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, College of Engineering and Applied Sciences, Chemistry and Biomedicine Innovation Center, Nanjing University, Nanjing, 210023, P. R. China
| | - Yuxiang Dong
- School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, P. R. China
| | - Yong Wang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, College of Engineering and Applied Sciences, Chemistry and Biomedicine Innovation Center, Nanjing University, Nanjing, 210023, P. R. China
| | - Zhenzhen Zhang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, College of Engineering and Applied Sciences, Chemistry and Biomedicine Innovation Center, Nanjing University, Nanjing, 210023, P. R. China
| | - Xuemeng Zhang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, College of Engineering and Applied Sciences, Chemistry and Biomedicine Innovation Center, Nanjing University, Nanjing, 210023, P. R. China
| | - Jun-Jie Zhu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, College of Engineering and Applied Sciences, Chemistry and Biomedicine Innovation Center, Nanjing University, Nanjing, 210023, P. R. China
| | - Ye Tian
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, College of Engineering and Applied Sciences, Chemistry and Biomedicine Innovation Center, Nanjing University, Nanjing, 210023, P. R. China
| | - Qianhao Min
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, College of Engineering and Applied Sciences, Chemistry and Biomedicine Innovation Center, Nanjing University, Nanjing, 210023, P. R. China
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Zhu Y, Wang J, Fu C, Liu S, Awasthi P, Zeng P, Chen D, Sun Y, Mo Z, Liu H. Temporally and spatially resolved molecular profiling in fingerprint analysis using indium vanadate nanosheets-assisted laser desorption ionization mass spectrometry. J Nanobiotechnology 2023; 21:475. [PMID: 38072936 PMCID: PMC10710729 DOI: 10.1186/s12951-023-02239-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Accepted: 12/03/2023] [Indexed: 12/18/2023] Open
Abstract
This study presents the first-ever synthesis of samarium-doped indium vanadate nanosheets (IVONSs:Sm) via microemulsion-mediated solvothermal method. The nanosheets were subsequently utilized as a nano-matrix in laser desorption/ionization mass spectrometry (LDI-MS). It was discovered that the as-synthesized IVONSs:Sm possessed the following advantages: improved mass spectrometry signal, minimal matrix-related background, and exceptional stability in negative-ion mode. These qualities overcame the limitations of conventional matrices and enabled the sensitive detection of small biomolecules such as fatty acids. The negative-ion LDI mechanism of IVONSs:Sm was examined through the implementation of density functional theory simulation. Using IVONSs:Sm-assisted LDI-MS, fingerprint recognitions based on morphology and chemical profiles of endogenous/exogenous compounds were also achieved. Notably, crucial characteristics such as the age of an individual's fingerprints and their physical state could be assessed through the longitudinal monitoring of particular biomolecules (e.g., ascorbic acid, fatty acid) or the specific biomarker bilirubin glucuronide. Critical information pertinent to the identification of an individual would thus be facilitated by the analysis of the compounds underlying the fingerprint patterns.
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Affiliation(s)
- Yanli Zhu
- School of Resources and Environment, Hunan University of Technology and Business, Changsha, Hunan, 410205, P. R. China
| | - Jikai Wang
- Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Institute of Pharmacy & Pharmacology, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, P. R. China.
| | - Chengxiao Fu
- The First Affiliated Hospital, Department of Clinical Laboratory, Department of Pharmacy, Hengyang Clinical Pharmacology Research Center, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, P. R. China
| | - Shuangquan Liu
- The First Affiliated Hospital, Department of Clinical Laboratory, Department of Pharmacy, Hengyang Clinical Pharmacology Research Center, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, P. R. China
| | - Pragati Awasthi
- State Key Laboratory of Silicon Materials & School of Materials Science and Engineering, Zhejiang University, Hangzhou, Zhejiang, 310058, P. R. China
| | - Pengfei Zeng
- Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Institute of Pharmacy & Pharmacology, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, P. R. China
| | - Danjun Chen
- The First Affiliated Hospital, Department of Clinical Laboratory, Department of Pharmacy, Hengyang Clinical Pharmacology Research Center, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, P. R. China
| | - Yiyang Sun
- Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Institute of Pharmacy & Pharmacology, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, P. R. China
| | - Ziyi Mo
- Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Institute of Pharmacy & Pharmacology, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, P. R. China
| | - Hailing Liu
- Department of Respiratory and Critical Care Medicine, Renmin Hospital of Wuhan University, Wuhan, Hubei, 430060, P. R. China
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Cournut A, Hosu IS, Braud F, Moustiez P, Coffinier Y, Enjalbal C, Bich C. Development of nanomaterial enabling highly sensitive surface-assisted laser desorption/ionization mass spectrometry peptide analysis. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2023; 37:e9476. [PMID: 36656736 DOI: 10.1002/rcm.9476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 01/14/2023] [Accepted: 01/18/2023] [Indexed: 06/17/2023]
Abstract
RATIONALE Surface-assisted laser desorption/ionization mass spectrometry (SALDI-MS) is an approach derived from matrix-assisted laser desorption/ionization (MALDI)-MS which overcomes the drawbacks associated with the use of organic matrices required to co-crystallize with the analytes. Indeed, nanomaterials commonly used in SALDI-MS as inert surfaces to promote desorption/ionization (D/I) ensure straightforward direct deposition of samples while providing mass spectra with ions only related to the compound of interest. The objective of this study was to develop a novel SALDI-MS approach based on steel plates that are surfaces very rapidly and easily tuned to perform the most efficient peptide detection as possible. To compare the SALDI efficacy of such metal substrates, D/I efficiency and deposit homogeneity were evaluated according to steel plate fabrication processes. METHODS The studied surfaces were nanostructured steel plates that were chemically modified by perfluorosilane and textured according to different frequencies and laser writing powers. The capacity of each tested 100 surfaces was demonstrated by comparative analyses of a mixture of standard peptides (m/z 600-3000) performed with a MALDI-TOF instrument enabling MALDI, SALDI and imaging experiments. RESULTS A peptide mix was used to screen the different surfaces depending on their D/I efficiency and their ability to ensure homogeneous deposit of the samples. For that purpose, deposition homogeneity was visualized owing to reconstructed ionic images from all protonated or sodiated ions of the 10 peptides constituting the standard mix. CONCLUSIONS Seven surfaces were then selected satisfying the required D/I efficiency and deposit homogeneity criteria. Results obtained with these optimal surfaces were then compared with those recorded by MALDI-MS analyses used as references.
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Affiliation(s)
- Aline Cournut
- Univ. Montpellier, CNRS, ENSCM, IBMM, UMR 5247, Montpellier, France
| | - Ioana Silvia Hosu
- Bioresources Department, National Institute for Research and Development in Chemistry and Petrochemistry, Bucharest, Romania
| | - Flavie Braud
- Univ. Lille, CNRS, UMR 8520 - IEMN, Lille, France
| | | | | | | | - Claudia Bich
- Univ. Montpellier, CNRS, ENSCM, IBMM, UMR 5247, Montpellier, France
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Tong Z, Shen C, Li Q, Yin H, Mao H. Combining sensors and actuators with electrowetting-on-dielectric (EWOD): advanced digital microfluidic systems for biomedical applications. Analyst 2023; 148:1399-1421. [PMID: 36752059 DOI: 10.1039/d2an01707e] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
The concept of digital microfluidics (DMF) enables highly flexible and precise droplet manipulation at a picoliter scale, making DMF a promising approach to realize integrated, miniaturized "lab-on-a-chip" (LOC) systems for research and clinical purposes. Owing to its simplicity and effectiveness, electrowetting-on-dielectric (EWOD) is one of the most commonly studied and applied effects to implement DMF. However, complex biomedical assays usually require more sophisticated sample handling and detection capabilities than basic EWOD manipulation. Alternatively, combined systems integrating EWOD actuators and other fluidic handling techniques are essential for bringing DMF into practical use. In this paper, we briefly review the main approaches for the integration/combination of EWOD with other microfluidic manipulation methods or additional external fields for specified biomedical applications. The form of integration ranges from independently operating sub-systems to fully coupled hybrid actuators. The corresponding biomedical applications of these works are also summarized to illustrate the significance of these innovative combination attempts.
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Affiliation(s)
- Zhaoduo Tong
- State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China. .,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Chuanjie Shen
- State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China. .,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Qiushi Li
- State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China.
| | - Hao Yin
- State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China. .,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Hongju Mao
- State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China.
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Harvey DJ. Analysis of carbohydrates and glycoconjugates by matrix-assisted laser desorption/ionization mass spectrometry: An update for 2017-2018. MASS SPECTROMETRY REVIEWS 2023; 42:227-431. [PMID: 34719822 DOI: 10.1002/mas.21721] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 07/26/2021] [Accepted: 07/26/2021] [Indexed: 06/13/2023]
Abstract
This review is the tenth update of the original article published in 1999 on the application of matrix-assisted laser desorption/ionization mass spectrometry (MALDI) mass spectrometry to the analysis of carbohydrates and glycoconjugates and brings coverage of the literature to the end of 2018. Also included are papers that describe methods appropriate to glycan and glycoprotein analysis by MALDI, such as sample preparation techniques, even though the ionization method is not MALDI. Topics covered in the first part of the review include general aspects such as theory of the MALDI process, new methods, matrices, derivatization, MALDI imaging, fragmentation and the use of arrays. The second part of the review is devoted to applications to various structural types such as oligo- and poly-saccharides, glycoproteins, glycolipids, glycosides, and biopharmaceuticals. Most of the applications are presented in tabular form. The third part of the review covers medical and industrial applications of the technique, studies of enzyme reactions, and applications to chemical synthesis. The reported work shows increasing use of combined new techniques such as ion mobility and highlights the impact that MALDI imaging is having across a range of diciplines. MALDI is still an ideal technique for carbohydrate analysis and advancements in the technique and the range of applications continue steady progress.
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Affiliation(s)
- David J Harvey
- Nuffield Department of Medicine, Target Discovery Institute, University of Oxford, Oxford, UK
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Yang M, Chen D, Hu J, Zheng X, Lin ZJ, Zhu H. The application of coffee-ring effect in analytical chemistry. Trends Analyt Chem 2022. [DOI: 10.1016/j.trac.2022.116752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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9
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BOA/DHB/Na: An Efficient UV-MALDI Matrix for High-Sensitivity and Auto-Tagging Glycomics. Int J Mol Sci 2022; 23:ijms232012510. [PMID: 36293368 PMCID: PMC9604046 DOI: 10.3390/ijms232012510] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 10/12/2022] [Accepted: 10/17/2022] [Indexed: 11/16/2022] Open
Abstract
Matrix selection is a critical factor for success in glycomics studies using matrix-assisted laser desorption/ionization–mass spectrometry (MALDI–MS). In this study, we evaluated and optimized a new solid ionic matrix—O-benzylhydroxylamine (BOA)/2,5-dihydroxybenzoic acid (DHB)/Na—containing BOA and a small amount of sodium as the counter salt of DHB. The concentration of a mixture of BOA/DHB/Na and glycans on a MALDI target plate led to O-benzyloxy tagging of the reducing ends of the glycans. The BOA/DHB/Na matrix showed excellent aggregation performance and the ability to form a homogeneous solid salt on the MALDI target plate with a water-repellent surface. In addition, the BOA/DHB/Na matrix showed a simple peak pattern with suppressed in-source and post-source decay of the reducing ends of the glycans, as well as improved ionization efficiency of glycans. Utilizing the characteristics of the BOA/DHB/Na matrix, O-glycan analysis of porcine stomach mucin showed excellent detection sensitivity and reproducibility of the peak patterns. This BOA/DHB/Na matrix can accelerate glycomics studies using MALDI–MS and, in combination with other organic salt-type matrices that we have developed, constitutes a valuable tool for glycomics studies.
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Iqbal R, Matsumoto A, Carlson D, Peters KT, Funari R, Sen AK, Shen AQ. Evaporation driven smart patterning of microparticles on a rigid-soft composite substrate. J Colloid Interface Sci 2022; 623:927-937. [DOI: 10.1016/j.jcis.2022.05.087] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 05/11/2022] [Accepted: 05/15/2022] [Indexed: 10/18/2022]
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Xu L, Li X, Li W, Chang K, Yang H, Tao N, Zhang P, Payne EM, Modavi C, Humphries J, Lu C, Abate AR. Microbowls with Controlled Concavity for Accurate Microscale Mass Spectrometry. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2108194. [PMID: 35045587 PMCID: PMC9028217 DOI: 10.1002/adma.202108194] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 12/15/2021] [Indexed: 06/14/2023]
Abstract
Patterned surfaces can enhance the sensitivity of laser desorption ionization mass spectrometry by segregating and concentrating analytes, but their fabrication can be challenging. Here, a simple method to fabricate substrates patterned with micrometer-scale wells that yield more accurate and sensitive mass spectrometry measurements compared to flat surfaces is described. The wells can also concentrate and localize cells and beads for cell-based assays.
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Affiliation(s)
- Linfeng Xu
- Department of Bioengineering and Therapeutic SciencesUniversity of California, San FranciscoSan FranciscoCA94158USA
| | - Xiangpeng Li
- Department of Bioengineering and Therapeutic SciencesUniversity of California, San FranciscoSan FranciscoCA94158USA
| | - Wenzong Li
- Amyris Inc.5885 Hollis St #100EmeryvilleCA94608USA
| | - Kai‐chun Chang
- Department of Bioengineering and Therapeutic SciencesUniversity of California, San FranciscoSan FranciscoCA94158USA
| | - Hyunjun Yang
- Institute for Neurodegenerative DiseasesWeill Institute for NeurosciencesUniversity of CaliforniaSan FranciscoCA94158USA
| | | | - Pengfei Zhang
- Department of Bioengineering and Therapeutic SciencesUniversity of California, San FranciscoSan FranciscoCA94158USA
| | - Emory M. Payne
- Department of ChemistryUniversity of MichiganAnn ArborMI48104USA
| | - Cyrus Modavi
- Department of Bioengineering and Therapeutic SciencesUniversity of California, San FranciscoSan FranciscoCA94158USA
| | | | - Chia‐Wei Lu
- Amyris Inc.5885 Hollis St #100EmeryvilleCA94608USA
| | - Adam R. Abate
- Department of Bioengineering and Therapeutic SciencesUniversity of California, San FranciscoSan FranciscoCA94158USA
- Chan Zuckerberg BiohubSan FranciscoCA94158USA
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12
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Du F, Zhang L, Shen W. Controllable dried patterns of colloidal drops. J Colloid Interface Sci 2022; 606:758-767. [PMID: 34419815 DOI: 10.1016/j.jcis.2021.08.089] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 08/12/2021] [Accepted: 08/13/2021] [Indexed: 12/18/2022]
Abstract
HYPOTHESIS When an aqueous colloidal drop dries on a solid substrate, the final pattern of the dried deposit can be manipulated through controlling the internal flow states of the drop. EXPERIMENTS We report a strategy to control the dried patterns of aqueous colloidal drop by controlling the drop configurations and relative humidity. For this purpose, both sessile and pendant drops are studied. FINDING The capillary flow, which is responsible for coffee-ring, is suppressed by increasing the relative humidity. Then, surprisingly, the internal convection in the pendant drop is significantly stronger than that in the sessile drop. This phenomenon leads to the formation of the disc-like and spot-like dried patterns in the sessile and pendant drop, respectively, which are the results of different interactions between the Marangoni and (buoyancy-induced) natural convections in the sessile and pendant drops. In the sessile drop, the Marangoni and natural convections mutually restrain each other due to their opposite flow directions. In contrast, in the pendant drop, the two convections mutually enhance each other, due to their same flow directions. Thisnew strategy offers a foreign-material-free and external-force-free means to control the dried patterns of the drop.
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Affiliation(s)
- Fan Du
- Department of Chemical Engineering, Monash University, Wellington Rd, VIC 3800, Australia
| | - Liyuan Zhang
- Department of Chemical Engineering, Monash University, Wellington Rd, VIC 3800, Australia.
| | - Wei Shen
- Department of Chemical Engineering, Monash University, Wellington Rd, VIC 3800, Australia.
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Kulkarni AS, Huang L, Qian K. Material-assisted mass spectrometric analysis of low molecular weight compounds for biomedical applications. J Mater Chem B 2021; 9:3622-3639. [PMID: 33871513 DOI: 10.1039/d1tb00289a] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Low molecular weight compounds play an important role in encoding the current physiological state of an individual. Laser desorption/ionization mass spectrometry (LDI MS) offers high sensitivity with low cost for molecular detection, but it is not able to cover small molecules due to the drawbacks of the conventional matrix. Advanced materials are better alternatives, showing little background interference and high LDI efficiency. Herein, we first classify the current materials with a summary of compositions and structures. Matrix preparation protocols are then reviewed, to enhance the selectivity and reproducibility of MS data better. Finally, we highlight the biomedical applications of material-assisted LDI MS, at the tissue, bio-fluid, and cellular levels. We foresee that the advanced materials will bring far-reaching implications in LDI MS towards real-case applications, especially in clinical settings.
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Affiliation(s)
- Anuja Shreeram Kulkarni
- State Key Laboratory for Oncogenes and Related Genes, Division of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 Pujian Road, Shanghai, 200127, P. R. China and School of Biomedical Engineering, Institute of Medical Robotics and Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, 200030, P. R. China.
| | - Lin Huang
- Stem Cell Research Center, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 Pujian Road, Shanghai, 200127, P. R. China.
| | - Kun Qian
- State Key Laboratory for Oncogenes and Related Genes, Division of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 Pujian Road, Shanghai, 200127, P. R. China and School of Biomedical Engineering, Institute of Medical Robotics and Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, 200030, P. R. China.
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14
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Harvey DJ. ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES BY MATRIX-ASSISTED LASER DESORPTION/IONIZATION MASS SPECTROMETRY: AN UPDATE FOR 2015-2016. MASS SPECTROMETRY REVIEWS 2021; 40:408-565. [PMID: 33725404 DOI: 10.1002/mas.21651] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 07/24/2020] [Indexed: 06/12/2023]
Abstract
This review is the ninth update of the original article published in 1999 on the application of matrix-assisted laser desorption/ionization (MALDI) mass spectrometry to the analysis of carbohydrates and glycoconjugates and brings coverage of the literature to the end of 2016. Also included are papers that describe methods appropriate to analysis by MALDI, such as sample preparation techniques, even though the ionization method is not MALDI. Topics covered in the first part of the review include general aspects such as theory of the MALDI process, matrices, derivatization, MALDI imaging, fragmentation and arrays. The second part of the review is devoted to applications to various structural types such as oligo- and poly-saccharides, glycoproteins, glycolipids, glycosides and biopharmaceuticals. Much of this material is presented in tabular form. The third part of the review covers medical and industrial applications of the technique, studies of enzyme reactions and applications to chemical synthesis. The reported work shows increasing use of combined new techniques such as ion mobility and the enormous impact that MALDI imaging is having. MALDI, although invented over 30 years ago is still an ideal technique for carbohydrate analysis and advancements in the technique and range of applications show no sign of deminishing. © 2020 Wiley Periodicals, Inc.
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Affiliation(s)
- David J Harvey
- Nuffield Department of Medicine, Target Discovery Institute, University of Oxford, Roosevelt Drive, Oxford, OX3 7FZ, United Kingdom
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15
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Qiao Z, Lissel F. MALDI Matrices for the Analysis of Low Molecular Weight Compounds: Rational Design, Challenges and Perspectives. Chem Asian J 2021; 16:868-878. [PMID: 33657276 PMCID: PMC8251880 DOI: 10.1002/asia.202100044] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 02/24/2021] [Indexed: 02/03/2023]
Abstract
The analysis of low molecular weight (LMW) compounds is of great interest to detect small pharmaceutical drugs rapidly and sensitively, or to trace and understand metabolic pathways. Matrix-assisted laser desorption/ionization mass spectrometry (MALDI MS) plays a central role in the analysis of high molecular weight (bio)molecules. However, its application for LMW compounds is restricted by spectral interferences in the low m/z region, which are produced by conventional organic matrices. Several strategies regarding sample preparation have been investigated to overcome this problem. A different rationale is centred on developing new matrices which not only meet the fundamental requirements of good absorption and high ionization efficiency, but are also vacuum stable and "MALDI silent", i. e., do not give matrix-related signals in the LMW area. This review gives an overview on the rational design strategies used to develop matrix systems for the analysis of LMW compounds, focusing on (i) the modification of well-known matrices, (ii) the search for high molecular weight matrices, (iii) the development of binary, hybrid and nanomaterial-based matrices, (iv) the advance of reactive matrices and (v) the progress made regarding matrices for negative or dual polarity mode.
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Affiliation(s)
- Zhi Qiao
- Institute of Macromolecular Chemistry, Leibniz Institute for Polymer Research Dresden, Hohe Str. 6, 01069 Dresden (Germany) Faculty of Chemistry and Food ChemistryDresden University of Technology, Mommsenstr. 401062DresdenGermany
| | - Franziska Lissel
- Institute of Macromolecular Chemistry, Leibniz Institute for Polymer Research Dresden, Hohe Str. 6, 01069 Dresden (Germany) Faculty of Chemistry and Food ChemistryDresden University of Technology, Mommsenstr. 401062DresdenGermany
- Institute of Organic Chemistry and Macromolecular ChemistryFriedrich Schiller University JenaHumboldtstr. 1007743JenaGermany
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16
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Kumar PL, Thampi SP, Basavaraj MG. Particle size and substrate wettability dependent patterns in dried pendant drops. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2021; 33:024003. [PMID: 33055378 DOI: 10.1088/1361-648x/abb64e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The particle laden sessile drops when dried on solid surfaces under certain conditions leave a deposit pattern wherein all the particles are confined to a narrow region close to the edge of the deposit. Such patterns which often form when coffee drops dry are referred to as the coffee ring patterns or the coffee stains. Recent research points to the formation of intriguing patterns when colloidal particle laden drops are dried in configurations other than sessile mode. In this article, the combined effect of particle size and wettability of the substrate on the patterns formed by drying drops in sessile and pendant configurations is investigated via experiments. Our results demonstrate a transition from coffee ring to central dome-like deposit morphology with decrease in wettability of the substrates when drops containing 3 μm diameter particles are dried in pendent mode. A similar transition in the deposit morphology is observed with increase in the diameter of the particles in pendant drops dried on substrates of near neutral wettability (θ = 86 ± 3°). The influence of particles size, substrate wettability and drop configuration on the kinetics of deposition of particles at the three phase contact line will also be discussed. We compare our experimental observations with particle based simulations wherein the dried patterns are generated by accounting for three particle transport modes, namely, advective particle transport resulting from capillary flow, gravity driven settling of particles and particle capture by descending interface.
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Affiliation(s)
- P Logesh Kumar
- Polymer Engineering and Colloid Science Laboratory, Department of Chemical Engineering, Indian Institute of Technology Madras, 600036, Chennai, India
| | - Sumesh P Thampi
- Polymer Engineering and Colloid Science Laboratory, Department of Chemical Engineering, Indian Institute of Technology Madras, 600036, Chennai, India
| | - Madivala G Basavaraj
- Polymer Engineering and Colloid Science Laboratory, Department of Chemical Engineering, Indian Institute of Technology Madras, 600036, Chennai, India
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17
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Chagunda IC, Russell GT, McIndoe JS. The signal-to-noise issue in mass spectrometric analysis of polymers. Polym Chem 2021. [DOI: 10.1039/d1py00461a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Mass spectrometric approaches to polymer analysis become increasingly ineffective as average molecular weight increases. This perspective explains these fundamental limits of MS for determining molecular weight distribution of high polymers.
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Affiliation(s)
| | - Gregory T. Russell
- School of Physical and Chemical Sciences
- University of Canterbury
- Christchurch 8140
- New Zealand
| | - J. Scott McIndoe
- Department of Chemistry
- University of Victoria
- Canada
- School of Physical and Chemical Sciences
- University of Canterbury
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18
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Sun D, Böhringer KF, Sorensen M, Nilsson E, Edgar JS, Goodlett DR. Droplet delivery and nebulization system using surface acoustic wave for mass spectrometry. LAB ON A CHIP 2020; 20:3269-3277. [PMID: 32760973 DOI: 10.1039/d0lc00495b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We present a piezoelectric transducer for standing wave surface acoustic wave nebulization (SW-SAWN). The transducer nebulizes nonvolatile analytes present in bulk fluid into ambient air after which the aerosolized drops are sampled by mass spectrometry (MS) for detection. Furthermore, we report for the first time integration of anisotropic ratchet conveyors (ARCs) on the SAWN transducer surfaces to automate the sample preparation and droplet delivery process. The ARCs employ micro-sized hydrophilic patterns on hydrophobic Cytop coatings. Moving, positioning, merging, and mixing of droplets at a designated nebulization location are demonstrated. To create the ARCs, we adopt parylene C as a stencil mask so that the hydrophobicity of the Cytop does not degrade during the microfabrication process. MS measurements with the SAWN chip are performed under different input frequencies. The SAWN transducer can provide a controllable nebulization rate by varying the input nebulization frequency while maintaining a reasonable signal to noise ratio for MS detection.
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Affiliation(s)
- Di Sun
- Department of Electrical and Computer Engineering, University of Washington, Seattle, WA 98195, USA. and Institute for Nano-Engineered Systems, University of Washington, Seattle, WA 98195, USA
| | - Karl F Böhringer
- Department of Electrical and Computer Engineering, University of Washington, Seattle, WA 98195, USA. and Institute for Nano-Engineered Systems, University of Washington, Seattle, WA 98195, USA
| | | | | | - J Scott Edgar
- Department of Medicinal Chemistry, University of Washington, Seattle, WA 98195, USA
| | - David R Goodlett
- School of Dentistry, University of Maryland, Baltimore, MD 21201, USA and International Centre for Cancer Vaccine Science, University of Gdansk, Gdansk, Poland, EU
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19
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Li N, Dou S, Feng L, Zhu Q, Lu N. Eliminating sweet spot in MALDI-MS with hydrophobic ordered structure as target for quantifying biomolecules. Talanta 2020; 218:121172. [PMID: 32797923 DOI: 10.1016/j.talanta.2020.121172] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2020] [Revised: 05/14/2020] [Accepted: 05/18/2020] [Indexed: 12/13/2022]
Abstract
In matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS), the analyte is usually distributed unevenly throughout the sample spot. The area with aggregated analyte molecules contributing abundant signal, is termed as "sweet spot", which results in poor detection reproducibility and makes it impossible to quantify analytes without internal standards. We proposed a strategy to eliminate sweet spot in MALDI-MS by using a hydrophobic ordered structure as target. The target is fabricated by creating a hydrophobic silicon nanopillar array and subsequently decorating it uniformly with poly(methyl methacrylate) nanodots for capturing analytes. The sweet spot is eliminated by distributing analyte molecules uniformly on this target, and then result in a uniform MS image, which demonstrates an ideal reproducibility. Finally, with the target assisted MALDI-MS as biosensor was suitable to analyze practical sample such as bacitracin A in milk. Horse heart myoglobin and, angiotensin III molecules can be quantified without internal standard using α-cyano-4-hydroxycinnamic acid as matrix. This biosensor presented good linearity, high salts tolerance and high signal-to-noise ratio (up to 271.8), even the 1 mol/L salt concentration. This strategy could provide an alternative for improving the performance of MALDI-MS.
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Affiliation(s)
- Ning Li
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, PR China
| | - Shuzhen Dou
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, PR China
| | - Lei Feng
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, PR China
| | - Qunyan Zhu
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, PR China
| | - Nan Lu
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, PR China.
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20
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Uzundal CB, Sahin O, Gokturk PA, Wu H, Mugele F, Ulgut B, Suzer S. X-ray Photoelectron Spectroscopy with Electrical Modulation Can Be Used to Probe Electrical Properties of Liquids and Their Interfaces at Different Stages. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:16989-16999. [PMID: 31794669 DOI: 10.1021/acs.langmuir.9b03134] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Operando X-ray photoelectron spectroscopy (o-XPS) has been used to record the binding energy shifts in the C 1s peak of a pristine poly(ethylene glycol) (PEG) liquid drop in an electrowetting on dielectric (EWOD) geometry and after exposing it to several high-voltage breakdown processes. This was achieved by recording XPS data while the samples were subjected to 10 V dc and ac (square-wave modulation) actuations to extract electrical information related to the liquid and its interface with the dielectric. Through analysis of the XPS data under ac actuation, a critical frequency of 170 Hz is extracted for the pristine PEG, which is translated to a resistance value of 14 MΩ for the liquid and a capacitance value of 60 pF for the dielectric, by the help of simulations using an equivalent circuit model and also by XPS analyses of a mimicking device under similar conditions. The same measurements yield an increased value of 23 MΩ for the resistance of the liquid after the breakdown by assuming that the capacitance of the dielectric stays constant. In addition, an asymmetry in polarity dependence is observed with respect to both the onset of the breakdown voltage and also the leakage behavior of the deteriorated (PEG + dielectric) system such that deviations are more pronounced at positive voltages. Both dc and ac behaviors of the postbreakdown system can also be simulated, but only by introducing an additional element, a diode or a polarity- and magnitude-dependent voltage source (VCVS), which might be attributed to negative charge accumulation at the interface. Measurements for a liquid mixture of PEG with 8% ionic liquid yields an almost 2 orders of magnitude smaller resistance for the drop as a result of the enhanced conductivity by the ions. Coupled with modeling, XPS measurements under dc and ac modulations enable probing unique electrochemical properties of liquid/solid interfaces.
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Affiliation(s)
- Can Berk Uzundal
- Department of Chemistry , Bilkent University , 06800 Ankara , Turkey
| | - Ozgur Sahin
- Department of Chemistry , Bilkent University , 06800 Ankara , Turkey
| | | | - Hao Wu
- Physics of Complex Fluids , University of Twente , 7522 NB , Enschede , The Netherlands
| | - Frieder Mugele
- Physics of Complex Fluids , University of Twente , 7522 NB , Enschede , The Netherlands
| | - Burak Ulgut
- Department of Chemistry , Bilkent University , 06800 Ankara , Turkey
| | - Sefik Suzer
- Department of Chemistry , Bilkent University , 06800 Ankara , Turkey
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21
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Dey R, van Gorcum M, Mugele F, Snoeijer JH. Soft electrowetting. SOFT MATTER 2019; 15:6469-6475. [PMID: 31289803 DOI: 10.1039/c9sm00847k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Electrowetting is a commonly used tool to manipulate sessile drops on hydrophobic surfaces. By applying an external voltage over a liquid and a dielectric-coated surface, one achieves a reduction of the macroscopic contact angles for increasing voltage. The electrostatic forces all play out near the contact line, on a scale of the order of the thickness of the solid dielectric layer. Here we explore the case where the dielectric is a soft elastic layer, which deforms elastically under the effect of electrostatic and capillary forces. The wetting behaviour is quantified by measurements of the static and dynamic contact angles, complemented by confocal microscopy to reveal the elastic deformations. Even though the mechanics near the contact line is highly intricate, the macroscopic contact angles can be understood from global conservation laws in the spirit of Young-Lippmann. The key finding is that, while elasticity has no effect on the static electrowetting angle, the substrate's viscoelasticity completely dictates the spreading dynamics of electrowetting.
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Affiliation(s)
- Ranabir Dey
- Max Planck Institute for Dynamics and Self-Organization, Am Fassberg 17, 37077 Goettingen, Germany. and Physics of Complex Fluids Group, Faculty of Science and Technology, University of Twente, P. O. Box 217, 7500AE Enschede, The Netherlands
| | - Mathijs van Gorcum
- Physics of Fluids Group, Faculty of Science and Technology, University of Twente, P. O. Box 217, 7500AE Enschede, The Netherlands.
| | - Frieder Mugele
- Physics of Complex Fluids Group, Faculty of Science and Technology, University of Twente, P. O. Box 217, 7500AE Enschede, The Netherlands
| | - Jacco H Snoeijer
- Physics of Fluids Group, Faculty of Science and Technology, University of Twente, P. O. Box 217, 7500AE Enschede, The Netherlands.
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22
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Ruiz-Gutiérrez É, Ledesma-Aguilar R. Lattice-Boltzmann Simulations of Electrowetting Phenomena. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:4849-4859. [PMID: 30869524 DOI: 10.1021/acs.langmuir.9b00098] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
When a voltage difference is applied between a conducting liquid and a conducting (solid) electrode, the liquid is observed to spread on the solid. This phenomenon, generally referred to as electrowetting, underpins a number of interfacial phenomena of interest in applications that range from droplet microfluidics to optics. Here, we present a lattice-Boltzmann method that can simulate the coupled hydrodynamics and electrostatics equations of motion of a two-phase fluid as a means to model the electrowetting phenomena. Our method has the advantage of modeling the electrostatic fields within the lattice-Boltzmann algorithm itself, eliminating the need for a hybrid method. We validate our method by reproducing the static equilibrium configuration of a droplet subject to an applied voltage and show that the apparent contact angle of the drop depends on the voltage following the Young-Lippmann equation up to contact angles of ≈50°. At higher voltages, we observe a saturation of the contact angle caused by the competition between electric and capillary stresses, similar to previous experimental observations. We also study the stability of a dielectric film trapped between a conducting fluid and a solid electrode and find a good agreement with analytical predictions based on lubrication theory. Finally, we investigate the film dynamics at long times and report observations of film breakup and entrapment similar to previously reported experimental results.
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Affiliation(s)
- Élfego Ruiz-Gutiérrez
- Smart Materials and Surfaces Laboratory , Northumbria University , Ellison Building, Ellison Place , Newcastle upon Tyne NE1 8ST , U.K
| | - Rodrigo Ledesma-Aguilar
- Smart Materials and Surfaces Laboratory , Northumbria University , Ellison Building, Ellison Place , Newcastle upon Tyne NE1 8ST , U.K
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23
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An auxiliary matrix for routine analysis of small molecules and biological macromolecules using matrix-assisted laser desorption ionization mass spectrometry. Anal Bioanal Chem 2019; 411:1041-1052. [DOI: 10.1007/s00216-018-1532-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 11/21/2018] [Accepted: 11/30/2018] [Indexed: 12/26/2022]
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24
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Patil AA, Chiang CK, Wen CH, Peng WP. Forced dried droplet method for MALDI sample preparation. Anal Chim Acta 2018; 1031:128-133. [DOI: 10.1016/j.aca.2018.05.056] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 05/20/2018] [Accepted: 05/21/2018] [Indexed: 01/28/2023]
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25
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Shin D, Lee D, Kim Y, Kim I, Paek J, Kim J. Comparison of freeze vacuum drying and conventional drying methods in matrix-assisted laser desorption/ionization mass spectrometry analyses of peptides. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2018; 32:1746-1750. [PMID: 29971856 DOI: 10.1002/rcm.8225] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2018] [Revised: 06/23/2018] [Accepted: 06/25/2018] [Indexed: 06/08/2023]
Affiliation(s)
- Dongwon Shin
- Department of Chemistry, Chungnam National University, Daejeon, 34134, Republic of Korea
| | - Dabin Lee
- Department of Chemistry, Chungnam National University, Daejeon, 34134, Republic of Korea
| | - Yeoseon Kim
- Department of Chemistry, Chungnam National University, Daejeon, 34134, Republic of Korea
| | - Inyoung Kim
- Department of Chemistry, Chungnam National University, Daejeon, 34134, Republic of Korea
| | - Jihyun Paek
- Department of Chemistry, Chungnam National University, Daejeon, 34134, Republic of Korea
| | - Jeongkwon Kim
- Department of Chemistry, Chungnam National University, Daejeon, 34134, Republic of Korea
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26
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Choi YK, Oh JY, Han SY. Large-Area Graphene Films as Target Surfaces for Highly Reproducible Matrix-Assisted Laser Desorption Ionization Suitable for Quantitative Mass Spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2018; 29:2003-2011. [PMID: 29998363 DOI: 10.1007/s13361-018-2024-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Revised: 06/25/2018] [Accepted: 06/26/2018] [Indexed: 06/08/2023]
Abstract
Due to the known sweet-spot issues that intrinsically arise from inhomogeneous formation of matrix-analyte crystals utilized as samples in matrix-assisted laser desorption ionization (MALDI) mass spectrometry, its reproducibility and thus its applications for quantification have been somewhat limited. In this paper, we report a simple strategy to improve the uniformity of matrix-analyte crystal spots, which we realized by adapting large-area graphene films, i.e., non-inert, interacting surfaces, as target surfaces. In this example, the graphitic surfaces of the graphene films interact with excess matrix molecules during the sample drying process, which induces spontaneous formation of optically uniform MALDI sample crystal layers on the film surfaces. Further, mass spectrometric imaging reveals that the visible uniformity is indeed accompanied by reproducible MALDI ionization over an entire sample spot, which greatly suppresses the appearance of sweet spots. The results of this study confirm that the proposed method achieves good linear responses of ion intensity to the analyte concentration (R2 > 0.99) with small relative standard deviations (σ < 10%), which is a range applicable for quantitative measurements using MALDI mass spectrometry. Graphical Abstract ᅟ.
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Affiliation(s)
- Yoon Kyung Choi
- Department of Nanochemistry, Gachon University, 1342 Seongnam-daero, Sujeong-gu, Seongnam-si, 13120, Gyeonggi-do, Republic of Korea
| | - Joo Yeon Oh
- ASTA Corp., 145 Gwanggyo-ro, Yeongtong-gu, Suwon-si, 16229, Gyeonggi-do, Republic of Korea
| | - Sang Yun Han
- Department of Nanochemistry, Gachon University, 1342 Seongnam-daero, Sujeong-gu, Seongnam-si, 13120, Gyeonggi-do, Republic of Korea.
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Calvano CD, Monopoli A, Cataldi TRI, Palmisano F. MALDI matrices for low molecular weight compounds: an endless story? Anal Bioanal Chem 2018; 410:4015-4038. [DOI: 10.1007/s00216-018-1014-x] [Citation(s) in RCA: 97] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Revised: 02/27/2018] [Accepted: 03/08/2018] [Indexed: 10/17/2022]
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Chen Y, Xu LP, Meng J, Deng S, Ma L, Zhang S, Zhang X, Wang S. Superwettable microchips with improved spot homogeneity toward sensitive biosensing. Biosens Bioelectron 2018; 102:418-424. [DOI: 10.1016/j.bios.2017.11.036] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 10/26/2017] [Accepted: 11/09/2017] [Indexed: 01/05/2023]
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29
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Mampallil D, Eral HB. A review on suppression and utilization of the coffee-ring effect. Adv Colloid Interface Sci 2018; 252:38-54. [PMID: 29310771 DOI: 10.1016/j.cis.2017.12.008] [Citation(s) in RCA: 250] [Impact Index Per Article: 41.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Revised: 11/29/2017] [Accepted: 12/14/2017] [Indexed: 01/22/2023]
Abstract
Evaporation of sessile droplets containing non-volatile solutes dispersed in a volatile solvent leaves behind ring-like solid stains. As the volatile species evaporates, pinning of the contact line gives rise to capillary flows that transport non-volatile solutes to the contact line. This phenomenon, called the coffee-ring effect, compromises the overall performance of industrially relevant manufacturing processes involving evaporation such as printing, biochemical analysis, manufacturing of nano-structured materials through colloidal and macromolecular patterning. Various approaches have been developed to suppress this phenomenon, which is otherwise difficult to avoid. The coffee-ring effect has also been leveraged to prepare new materials through convection induced assembly. This review underlines not only the strategies developed to suppress the coffee-ring effect but also sheds light on approaches to arrive at novel processes and materials. Working principles and applicability of these strategies are discussed together with a critical comparison.
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Affiliation(s)
- Dileep Mampallil
- Indian Institute of Science Education & Research Tirupati, Mangalam P. O., Tirupati-517507, India.
| | - Huseyin Burak Eral
- Process & Energy Department, 3ME Faculty, TU Delft, Leeghwaterstraat 39, 2628CB Delft, The Netherlands.
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30
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Le Pogam P, Boustie J, Richomme P, Denis A, Schinkovitz A. The inherent matrix properties of lichen metabolites in matrix-assisted laser desorption ionization time-of-flight mass spectrometry. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2017; 31:1993-2002. [PMID: 28873258 DOI: 10.1002/rcm.7980] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 08/24/2017] [Accepted: 08/30/2017] [Indexed: 06/07/2023]
Abstract
RATIONALE Light-absorbing secondary metabolites from lichens were recently reported to exhibit promising Laser Desorption Ionization (LDI) properties, enabling their direct detection from crude lichen extracts. In addition, many of them display close structural homologies to commercial Matrix-Assisted Laser Desorption Ionization (MALDI) matrices, which is incentive for the evaluation of their matrical properties. The current study systematically evaluated the matrix effects of several structural classes of lichen metabolites: monoaromatic compounds, quinone derivatives, dibenzofuran-related molecules and the shikimate-derived vulpinic acid. Their matrical properties were tested against a wide range of structurally diverse analytes including alkaloids, coumarins, flavonoids and peptides. METHODS Triplicate automatic positive-ion mode MALDI analyses were carried out and ionization efficiencies were compared with those of structurally related reference matrices (i.e. DHB, HCCA, dithranol and usnic acid) in terms of (i) analyte absolute intensities and (ii) Matrix Suppressing Effect (MSE) scores. RESULTS Monoaromatic lichen metabolites revealed matrical properties similar to those of DHB when obtained under comparable experimental conditions. Likewise, anthraquinone metabolites triggered ionization of tested analytes in a similar way to the structurally related dithranol. Finally, dibenzofuran derivatives displayed a broad ionization profile, reminiscent of that of (+)-usnic acid. CONCLUSIONS Lichen metabolites exhibit interesting MALDI matrix properties, especially for medium and low molecular weight analytes. For many of the tested molecules, matrix ion formation was very limited. This proof-of-concept study paves the way for follow-up investigations to assess the matrix properties of lichen metabolites against a wider array of analytes as well as adapting experimental settings to individually optimize the performance of successfully tested candidates.
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Affiliation(s)
- Pierre Le Pogam
- Institut d'Électronique et de Télécommunications de Rennes, Université de Rennes 1, UMR CNRS 6164, 263 Avenue du Général Leclerc, 35042, Rennes Cedex, France
| | - Joël Boustie
- Institut des Sciences Chimiques de Rennes, Université de Rennes 1, UMR CNRS 6226, 2 Avenue du Professeur Léon Bernard, 35043, Rennes Cedex, France
| | - Pascal Richomme
- SONAS/SFR QUASAV, Université d'Angers, Université Bretagne Loire, Campus du végétal, 42 rue Georges Morel, 49070, Beaucouzé, France
| | - Antoine Denis
- Institut d'Électronique et de Télécommunications de Rennes, Université de Rennes 1, UMR CNRS 6164, 263 Avenue du Général Leclerc, 35042, Rennes Cedex, France
| | - Andreas Schinkovitz
- SONAS/SFR QUASAV, Université d'Angers, Université Bretagne Loire, Campus du végétal, 42 rue Georges Morel, 49070, Beaucouzé, France
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DMF-MALDI: droplet based microfluidic combined to MALDI-TOF for focused peptide detection. Sci Rep 2017; 7:6756. [PMID: 28754890 PMCID: PMC5533719 DOI: 10.1038/s41598-017-06660-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Accepted: 06/13/2017] [Indexed: 12/21/2022] Open
Abstract
We present an automated droplet microfluidic system (DMF) to generate monitored nanoliter aqueous droplets in oil and their deposition on a commercial stainless steel plate for MALDI-TOF analysis of peptides or protein digests. We demonstrate that DMF-MALDI combination focuses the analyte on the MALDI plate, increasing considerably the homogeneity of the dried material. This results in a 30times enhanced MALDI-TOF MS signal for a model peptide, allowing a significant improvement of the detection sensitivity limit (down to few tens of attomoles). Moreover, positive detection can be achieved from sub-nanomolar peptides solutions and better overall protein sequence coverages are obtained from few tens attomoles of protein digest. These results make DMF-MALDI a promising approach for the treatment of peptides samples as well as a key component for an integrated approach in the proteomic field.
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Sen S, Chakraborty M, Goley S, Dasgupta S, DasGupta S. Fibrillar disruption by AC electric field induced oscillation: A case study with human serum albumin. Biophys Chem 2017; 226:23-33. [DOI: 10.1016/j.bpc.2017.04.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 04/07/2017] [Accepted: 04/12/2017] [Indexed: 11/25/2022]
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Kudina O, Eral HB, Mugele F. E-MALDI: optimized conditions during electrowetting-enhanced drop drying for MALDI-MS. JOURNAL OF MASS SPECTROMETRY : JMS 2017; 52:405-410. [PMID: 28422343 DOI: 10.1002/jms.3934] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Revised: 04/03/2017] [Accepted: 04/04/2017] [Indexed: 06/07/2023]
Abstract
We recently showed that electrowetting-enhanced sample preparation for MALDI-MS (eMALDI) can increase the intensity of the MALDI signal by 2-25 times compared with conventional drop drying by concentrating all the dried sample in a single spot rather than leaving behind a heterogeneous coffee-stain pattern. Here, we demonstrate that the eMALDI signal enhancement can be further increased to more than 100 times by systematically optimizing the electrowetting actuation frequency and amplitude. This enables 30 times signal increase for a peptide standard. Simultaneously, drop drying times can be reduced approximately five times by increasing the actuation voltage and/or decreasing the initial drop volume. Copyright © 2017 John Wiley & Sons, Ltd.
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Affiliation(s)
- O Kudina
- Physics of Complex Fluids, MESA+ Institute for Nanotechnology, University of Twente, PO Box 217, 7500, AE, Enschede, The Netherlands
| | - H B Eral
- Process and Energy Department, Delft University of Technology, Leeghwaterstraat 39, 2628CB, Delft, The Netherlands
- Van't Hoff Laboratory for Physical and Colloid Chemistry, Utrecht University, Padualaan 8, 3584 CH, Utrecht, The Netherlands
| | - F Mugele
- Physics of Complex Fluids, MESA+ Institute for Nanotechnology, University of Twente, PO Box 217, 7500, AE, Enschede, The Netherlands
- Process and Energy Department, Delft University of Technology, Leeghwaterstraat 39, 2628CB, Delft, The Netherlands
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Wang S, Xiao C, Li Y, Ling L, Chen X, Guo X. A Surface Pattern on MALDI Steel Plate for One-Step In-Situ Self-Desalting and Enrichment of Peptides/Proteins. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2017; 28:428-433. [PMID: 28058591 DOI: 10.1007/s13361-016-1584-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2016] [Revised: 11/30/2016] [Accepted: 12/14/2016] [Indexed: 06/06/2023]
Abstract
We report a novel strategy to achieve simultaneous one-step in-situ self-desalting and enrichment (OISE) of peptides/proteins on a facilely fabricated patterned MALDI steel plate with a circular paraffin-steel-polystyrene structure. The OISE plate could efficiently segregate salts from both analytes and matrices while retaining both analyte and matrix concentrate, and facilitating them to form homogeneous co-crystals on the centrally located polystyrene pattern. With the OISE plate, high quality and reproducible spectra could be obtained for low abundance peptides even in the presence of high salt concentrations (200 mM NH4HCO3, 1 M NaCl, or 400 mM urea). Using this strategy, a significant sensitivity enhancement was gained over traditional MALDI plate. The practical utility of this method was further demonstrated by the successful profiling of BSA digests and human serum. Graphical Abstract ᅟ.
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Affiliation(s)
- Sheng Wang
- College of Chemistry, Jilin University, Changchun, 130012, China
| | - Chunsheng Xiao
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China.
| | - Ying Li
- College of Chemistry, Jilin University, Changchun, 130012, China
| | - Ling Ling
- College of Chemistry, Jilin University, Changchun, 130012, China
| | - Xuesi Chen
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
| | - Xinhua Guo
- College of Chemistry, Jilin University, Changchun, 130012, China.
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Wang P, Giese RW. Recommendations for quantitative analysis of small molecules by matrix-assisted laser desorption ionization mass spectrometry. J Chromatogr A 2017; 1486:35-41. [PMID: 28118972 DOI: 10.1016/j.chroma.2017.01.040] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 12/21/2016] [Accepted: 01/16/2017] [Indexed: 12/15/2022]
Abstract
Matrix-assisted laser desorption ionization mass spectrometry (MALDI-MS) has been used for quantitative analysis of small molecules for many years. It is usually preceded by an LC separation step when complex samples are tested. With the development several years ago of "modern MALDI" (automation, high repetition laser, high resolution peaks), the ease of use and performance of MALDI as a quantitative technique greatly increased. This review focuses on practical aspects of modern MALDI for quantitation of small molecules conducted in an ordinary way (no special reagents, devices or techniques for the spotting step of MALDI), and includes our ordinary, preferred methods The review is organized as 18 recommendations with accompanying explanations, criticisms and exceptions.
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Affiliation(s)
- Poguang Wang
- Department of Pharmaceutical Sciences and Barnett Institute, Bouve College, Northeastern University, Boston, MA 02115, USA
| | - Roger W Giese
- Department of Pharmaceutical Sciences and Barnett Institute, Bouve College, Northeastern University, Boston, MA 02115, USA.
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Shin D, Kim I, Paek J, Kim J. A Novel “Freeze Vacuum Drying” Crystallization Method Toward Quantitative MALDI-MS. B KOREAN CHEM SOC 2017. [DOI: 10.1002/bkcs.11046] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Dongwon Shin
- Department of Chemistry; Chungnam National University; Daejeon 305-764 Republic of Korea
| | - Inyoung Kim
- Department of Chemistry; Chungnam National University; Daejeon 305-764 Republic of Korea
| | - Jihyun Paek
- Department of Chemistry; Chungnam National University; Daejeon 305-764 Republic of Korea
| | - Jeongkwon Kim
- Department of Chemistry; Chungnam National University; Daejeon 305-764 Republic of Korea
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Affiliation(s)
- Patricia M Peacock
- First State IR, LLC , 118 Susan Drive, Hockessin, Delaware 19707, United States
| | - Wen-Jing Zhang
- Department of Chemistry, Wayne State University , 5101 Cass Avenue, Detroit, Michigan 48202, United States
| | - Sarah Trimpin
- Department of Chemistry, Wayne State University , 5101 Cass Avenue, Detroit, Michigan 48202, United States
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