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Simplified miniaturized analytical set-up based on molecularly imprinted polymer directly coupled to UV detection for the determination of benzoylecgonine in urine. Talanta 2021; 233:122611. [PMID: 34215095 DOI: 10.1016/j.talanta.2021.122611] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 06/09/2021] [Accepted: 06/10/2021] [Indexed: 02/03/2023]
Abstract
A simple, selective, and sensitive method involving a miniaturized solid phase extraction step based on a monolithic molecularly imprinted polymer (MIP) directly coupled on-line to UV detection was developed for the determination of benzoylecgonine (BZE) in complex biological samples. Monolithic MIPs were prepared into 100 μm internal diameter fused-silica capillaries either by thermal or photopolymerization. While leading to similar selectivities with respect to BZE, photopolymerization has made it possible to produce monoliths of different lengths that can be adapted to the targeted miniaturized application. The homogeneous morphology of these monolithic MIPs was evaluated by scanning electron microscopy prior to measuring their permeability. Their selectivity was evaluated leading to imprinting factors of 2.7 ± 0.1 for BZE and 4.0 ± 0.6 for cocaine (selected as template for the MIP synthesis) with polymers resulting from three independent syntheses, showing both the high selectivity of the MIPs and the reproducibility of their synthesis. After selecting the appropriate capillary length and the set-up configuration and optimizing the extraction protocol to promote selectivity, the extraction of BZE present in human urine samples spiked at 150, 250, and 500 ng mL-1 was successfully carried out on the monolithic MIP and coupled directly on-line with UV detection. The very clean-baseline of the resulting chromatograms revealing only the peak of interest for BZE illustrated the high selectivity brought by the monolithic MIP. Limits of detection and quantification of 56.4 ng mL-1 and 188.0 ng mL-1 were achieved in urine samples, respectively. It is therefore possible to achieve analytical threshold in accordance with the legislation on BZE detection in urine without the need for an additional chromatographic separation.
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Boronate affinity solid-phase extraction of cis-diol compounds by a one-step electrochemically synthesized selective polymer sorbent. Anal Bioanal Chem 2017; 410:501-508. [DOI: 10.1007/s00216-017-0740-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 09/27/2017] [Accepted: 11/02/2017] [Indexed: 02/07/2023]
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Sun Y, Yuan J, Pang J, Li X, Wang S, Zhou Y, Xu F, Li PCH, Jiang S, Chen H. Millifluidic chip with a modular design used as a sample pretreatment cartridge for flour and flour food products. Talanta 2017; 179:719-725. [PMID: 29310299 DOI: 10.1016/j.talanta.2017.12.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Revised: 11/28/2017] [Accepted: 12/02/2017] [Indexed: 01/05/2023]
Abstract
The integration of sample pretreatment remains one of the hurdles towards a rapid, automated micro total analytical system (µ-TAS) for real samples. In this paper, a modular design, which was used for sample preparation, has been developed as the polydimethylsiloxane (PDMS) millifluidic chips with channels at a millimeter level. Multiple functional units, including extraction, filtration, mixing and solid phase extraction (SPE), for sample pretreatment were integrated in one chip. In this chip, each functional unit was connected by pump tubings and one-way valves in series to form a fully automated system. Based on the modular design, multiple functional units have been combined in different sequences according to practical needs. In addition, the proposed system has characteristics of miniaturization, portability, and real-time application. Herein, spiked benzoyl peroxide (BPO) in flour samples was used as a model compound to study the system's performances. With a portable integrated Raman spectrometer for detection, the detection limit of BPO was 0.017gkg-1, with a linear relationship from 0.025 to 0.5gkg-1. This modular design was demonstrated to be effective and it can be expanded for pretreatment of other food samples.
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Affiliation(s)
- Yue Sun
- School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou 510006, China; Key Laboratory of State Administration of TCM for Digital Quality Evaluation of Chinese Materia Medica, Guangzhou 510006, China; Engineering and Technology Research Center for Chinese Materia Medica Quality of the Universities of Guangdong Province, Guangzhou 510006, China.
| | - Junchun Yuan
- Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361005, China
| | - Jinling Pang
- School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou 510006, China; Key Laboratory of State Administration of TCM for Digital Quality Evaluation of Chinese Materia Medica, Guangzhou 510006, China; Engineering and Technology Research Center for Chinese Materia Medica Quality of the Universities of Guangdong Province, Guangzhou 510006, China
| | - Xiaonan Li
- School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou 510006, China; Key Laboratory of State Administration of TCM for Digital Quality Evaluation of Chinese Materia Medica, Guangzhou 510006, China; Engineering and Technology Research Center for Chinese Materia Medica Quality of the Universities of Guangdong Province, Guangzhou 510006, China
| | - Shumei Wang
- School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou 510006, China; Key Laboratory of State Administration of TCM for Digital Quality Evaluation of Chinese Materia Medica, Guangzhou 510006, China; Engineering and Technology Research Center for Chinese Materia Medica Quality of the Universities of Guangdong Province, Guangzhou 510006, China
| | - Yongliang Zhou
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Fang Xu
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada V5A1S6
| | - Paul C H Li
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada V5A1S6
| | - Shusen Jiang
- Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361005, China
| | - Hong Chen
- Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361005, China.
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Capillary electrophoresis hyphenated with UV-native-laser induced fluorescence detection (CE/UV-native-LIF). Electrophoresis 2016; 38:135-149. [DOI: 10.1002/elps.201600248] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Revised: 07/11/2016] [Accepted: 07/12/2016] [Indexed: 01/01/2023]
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Álvarez-Martos I, Alonso-Bartolomé R, Mulas Hernández V, Anillo A, Costa-García A, García Alonso FJ, Fernández-Abedul MT. Poly(glycidyl methacrylate) as a tunable platform of modifiers for microfluidic devices. REACT FUNCT POLYM 2016. [DOI: 10.1016/j.reactfunctpolym.2016.01.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Li L, Xia LR, Wang HY, Bi XD. New method for fabricating an α-fetoprotein affinity monolithic polymer array. J Appl Polym Sci 2014. [DOI: 10.1002/app.41792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Li Li
- Institute of Facilities and Equipment in Agriculture; Jiangsu Academy of Agricultural Sciences; Nanjing 210014 China
| | - Li-Ru Xia
- Institute of Facilities and Equipment in Agriculture; Jiangsu Academy of Agricultural Sciences; Nanjing 210014 China
| | - He-Ye Wang
- Institute of Facilities and Equipment in Agriculture; Jiangsu Academy of Agricultural Sciences; Nanjing 210014 China
| | - Xiao-Dong Bi
- Key Laboratory of Analytical Chemistry for Life Science; School of Chemistry and Chemical Engineering; Nanjing University; Nanjing 210093 China
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Siegel D. Applications of reversible covalent chemistry in analytical sample preparation. Analyst 2012; 137:5457-82. [PMID: 23013801 DOI: 10.1039/c2an35697j] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Reversible covalent chemistry (RCC) adds another dimension to commonly used sample preparation techniques like solid-phase extraction (SPE), solid-phase microextraction (SPME), molecular imprinted polymers (MIPs) or immuno-affinity cleanup (IAC): chemical selectivity. By selecting analytes according to their covalent reactivity, sample complexity can be reduced significantly, resulting in enhanced analytical performance for low-abundance target analytes. This review gives a comprehensive overview of the applications of RCC in analytical sample preparation. The major reactions covered include reversible boronic ester formation, thiol-disulfide exchange and reversible hydrazone formation, targeting analyte groups like diols (sugars, glycoproteins and glycopeptides, catechols), thiols (cysteinyl-proteins and cysteinyl-peptides) and carbonyls (carbonylated proteins, mycotoxins). Their applications range from low abundance proteomics to reversible protein/peptide labelling to antibody chromatography to quantitative and qualitative food analysis. In discussing the potential of RCC, a special focus is on the conditions and restrictions of the utilized reaction chemistry.
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Affiliation(s)
- David Siegel
- BAM Federal Institute for Materials Research and Testing, Richard-Willstätter-Str 11, 12489 Berlin, Germany.
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Poly (acrylic acid) microchannel modification for the enhanced resolution of catecholamines microchip electrophoresis with electrochemical detection. Anal Chim Acta 2012; 724:136-43. [DOI: 10.1016/j.aca.2012.02.053] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2012] [Revised: 02/27/2012] [Accepted: 02/29/2012] [Indexed: 12/14/2022]
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Hsieh MM, Lin EP, Huang SW. On-line concentration and separation of cationic and anionic neurochemicals by capillary electrophoresis with UV absorption detection. Talanta 2012; 88:638-45. [DOI: 10.1016/j.talanta.2011.11.050] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2011] [Revised: 11/16/2011] [Accepted: 11/17/2011] [Indexed: 11/25/2022]
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Liu Y, Ren L, Liu Z. A unique boronic acid functionalized monolithic capillary for specific capture, separation and immobilization of cis-diol biomolecules. Chem Commun (Camb) 2011; 47:5067-9. [PMID: 21431198 DOI: 10.1039/c0cc05675h] [Citation(s) in RCA: 150] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
We report a sulfonyl substituted phenylboronic acid containing monolith capillary that exhibited not only a strong boronate affinity at neutral pH but also secondary separation capability to cis-diol biomolecules.
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Affiliation(s)
- Yunchun Liu
- Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
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Cakal C, Ferrance JP, Landers JP, Caglar P. Microchip extraction of catecholamines using a boronic acid functional affinity monolith. Anal Chim Acta 2011; 690:94-100. [DOI: 10.1016/j.aca.2011.02.009] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2010] [Revised: 01/29/2011] [Accepted: 02/02/2011] [Indexed: 11/24/2022]
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