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Tega DU, Campos Oliveira LF, Ferreira PC, Soldera BB, Nascimento HDL, Eberlin MN, Sussulini A. Caffeine quantification in dietary supplements using high-throughput on-line solid phase extraction coupled to Venturi easy ambient sonic-spray ionization mass spectrometry. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2024; 16:2678-2683. [PMID: 38623781 DOI: 10.1039/d4ay00333k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/17/2024]
Abstract
Caffeine is present in a large number of beverages and is an additive used in dietary supplements. Therefore, the concern about its quality and safety for consumers has been increasing and hence requires faster and simpler analytical methods to determine the caffeine amount. The high-throughput analysis is an appropriate solution to pharmaceuticals, bioanalysis, forensic and food laboratory routines. In this sense, Venturi easy ambient sonic-spray ionization mass spectrometry (V-EASI-MS), a specific ambient ionization source, is suitable to enable direct analysis of sample solutions in real time and is appropriate to be coupled to liquid chromatography (LC). The development of an on-line solid phase extraction system coupled to V-EASI-MS optimizes the advantages of LC-MS hyphenation by enhancing the figures of merit of the analytical method according to AOAC guidelines and simultaneously minimizing the runtime analysis to 1.5 min per sample, as well as sample preparation steps and solvent consumption, which is currently a challenge for quantitative applications of ambient ionization MS.
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Affiliation(s)
- David Ulisses Tega
- Laboratory of Bioanalytics and Integrated Omics (LaBIOmics), Department of Analytical Chemistry, Institute of Chemistry, Universidade Estadual de Campinas (UNICAMP), 13083-970, Campinas, SP, Brazil.
| | - Luan Felipe Campos Oliveira
- Laboratory of Bioanalytics and Integrated Omics (LaBIOmics), Department of Analytical Chemistry, Institute of Chemistry, Universidade Estadual de Campinas (UNICAMP), 13083-970, Campinas, SP, Brazil.
| | - Patrick Cesar Ferreira
- Laboratory of Bioanalytics and Integrated Omics (LaBIOmics), Department of Analytical Chemistry, Institute of Chemistry, Universidade Estadual de Campinas (UNICAMP), 13083-970, Campinas, SP, Brazil.
| | - Bruna Beatriz Soldera
- Laboratory of Bioanalytics and Integrated Omics (LaBIOmics), Department of Analytical Chemistry, Institute of Chemistry, Universidade Estadual de Campinas (UNICAMP), 13083-970, Campinas, SP, Brazil.
| | - Heliara Dalva Lopes Nascimento
- Laboratory of Bioanalytics and Integrated Omics (LaBIOmics), Department of Analytical Chemistry, Institute of Chemistry, Universidade Estadual de Campinas (UNICAMP), 13083-970, Campinas, SP, Brazil.
| | - Marcos Nogueira Eberlin
- School of Engineering, Mackenzie Presbyterian University, Rua da Consolação 930, 01302-907, São Paulo, SP, Brazil
- Mackenzie Institute for Research in Graphene and Nanotechnologies (MackGraphe), Rua da Consolação 896, 01302-907, São Paulo, SP, Brazil
| | - Alessandra Sussulini
- Laboratory of Bioanalytics and Integrated Omics (LaBIOmics), Department of Analytical Chemistry, Institute of Chemistry, Universidade Estadual de Campinas (UNICAMP), 13083-970, Campinas, SP, Brazil.
- Instituto Nacional de Ciência e Tecnologia de Bioanalítica (INCTBio), Institute of Chemistry, Universidade Estadual de Campinas (UNICAMP), 13083-970, Campinas, SP, Brazil
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Teng K, Shi J, Zhu Y, Yu Q. Micro-tapered aperture nebulization ionization for versatile mass spectrometry analysis. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2022; 14:4886-4892. [PMID: 36420596 DOI: 10.1039/d2ay01657e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The bloom of new ionization sources is promoting the prosperity and application of mass spectrometry analysis. In this study, we introduced a new (high) voltage-free ionization method termed micro-tapered aperture nebulization ionization (MANI), which only requires the use of a common micro-tapered aperture atomizer to operate. It is found that liquid nebulization on this type of atomizer can induce ionization of the dissolved analytes in the droplets without the assistance of additional voltage and gas. By assembling the commercially available atomizer module into a 3D-printed chamber, a compact MANI source was constructed and then characterized. This source has a high ion yield and satisfactory quantitative performance, and it is preferably used to analyze aqueous solutions. Furthermore, it exhibits broad applicability and can be easily extended to multiple applications, including liquid extraction surface analysis of solid samples and direct analysis of gaseous analytes via secondary spray ionization. In short, the MANI source is a simple, safe, green, and versatile tool that can assist mass spectrometers to perform routine and diverse analysis.
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Affiliation(s)
- Keguo Teng
- Division of Advanced Manufacturing, Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China.
| | - Jianbo Shi
- Open FIESTA, Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China
| | - Yanping Zhu
- Division of Advanced Manufacturing, Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China.
| | - Quan Yu
- Division of Advanced Manufacturing, Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China.
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Wang W, Jin L, Hu F, Xu F, Ding CF. Nebulization Swab Assisted Photoionization Tandem Miniaturized Ion Trap Mass Spectrometry for On-Site Analysis of Nonvolatile Compounds. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2022; 33:898-906. [PMID: 35475621 DOI: 10.1021/jasms.2c00048] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Nonvolatile compounds usually have a high molecular weight and exhibit a high boiling point, which poses great challenges to the ionization method of MS. Ambient ionization sources can efficiently analyze the nonvolatile compounds without complex pretreatment, but they generally require special media such as heating devices, laser optical devices, or corona needles. Acoustic nebulization assisted photoionization (ANPI) is a potential method for the analysis of nonvolatile compounds that uses nebulization as a prerequisite for photoionization and introduces many advantages of PI, including excellent ionization efficiency, a high yield of molecular ions, and simplified spectrum interpretation. However, the ANPI source can be limited in on-site applications by the complexity of the analytical devices and the high cost of the nebulization chip. To address this issue, in this paper, we explored cheap and commercially piezoelectric materials used in a mist sprayer and fabricated a nebulization swab assisted photoionization (NSAP) as an ambient ionization source. Some useful results are presented: numerical simulation was introduced successfully for optimizing the aerosol distribution in the NSAP source; nonvolatile muscle relaxants, drugs of abuse, antibiotics, phthalates, and cholesterol were detected mostly as their protonated molecular ions while some special acetone/water cluster ions were detected. In addition, the LOD for most of the target analytes ranged from 10.0 to 50.0 pg with RSD ≤ 9%. Finally, this method is implemented for Chinese baijiu spiked with phthalates. The experimental data shows the capability of a NSAP source in high sensitivity and on-site analysis of the nonvolatile compounds.
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Affiliation(s)
- Weimin Wang
- Key Laboratory of Advanced Mass spectrometry and Molecular Analysis of Zhejiang Province, Institute of Mass spectrometry, School of Material Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
| | - Liuyu Jin
- Key Laboratory of Advanced Mass spectrometry and Molecular Analysis of Zhejiang Province, Institute of Mass spectrometry, School of Material Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
| | - Fengqing Hu
- Department of Cardiothoracic Surgery, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200000, China
| | - Fuxing Xu
- Key Laboratory of Advanced Mass spectrometry and Molecular Analysis of Zhejiang Province, Institute of Mass spectrometry, School of Material Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
| | - Chuan-Fan Ding
- Key Laboratory of Advanced Mass spectrometry and Molecular Analysis of Zhejiang Province, Institute of Mass spectrometry, School of Material Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
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