L -抗坏血酸分子印迹聚合物数字间传感器的制备

IF 1.6 4区化学 Q4 CHEMISTRY, PHYSICAL

Surface and Interface Analysis Pub Date : 2023-11-07 DOI:10.1002/sia.7266

Muafia Akbar, Nauman Sadiq, Memoona Shakoor, Muhammad Shafique, Anum Tahir, Muhammad Zahid, Ghulam Mustafa

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引用次数: 0

摘要

L -抗坏血酸(AA)在各种天然和人工食品、药品和其他物质中的含量必须用于生物和农业目的。本研究以甲基丙烯酸为单体，乙二醇二甲基丙烯酸酯(EGDMA)为交联剂，偶氮二异丁腈(AIBN)为引发剂，在致孔溶剂二甲亚砜(DMSO)的存在下，采用热自由基本体聚合法制备了AA印迹聚甲基丙烯酸基受体，用于检测抗坏血酸。合成的分子印迹聚合物(MIP)作为受体。将受体层固定在IDEs上，通过LCR计测量电感、电容、电阻等电参数的变化，为AA检测提供了合适的传感器。在串联和并联电感中，最低检出限分别为0.13 ppm和0.001 ppm。串联电容和并联电容的最低检出限分别为0.01548 ppm和1.3698 ppm。在电阻情况下，串联和并联的最低检出限分别为0.0076和0.08121 ppm。印迹聚合物传感器对抗坏血酸具有灵敏度、选择性和可逆性。

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Fabrication of molecularly imprinted polymer‐based interdigital sensor for L‐ascorbic acid

The level of L‐ascorbic acid (AA) in various natural and artificial foods, medicines and other substances must be determined for biological and agricultural purposes. In this study, an AA‐imprinted poly (methacrylic acid)‐based receptor was synthesized by thermal free‐radical bulk polymerization for the detection of ascorbic acid using the methacrylic acid as monomer, ethylene glycol dimethacrylate (EGDMA) as cross‐linker, and azobisisobutyronitrile (AIBN) as initiator, in the presence of a porogenic solvent dimethyl sulfoxide (DMSO). The synthesized molecularly imprinted polymer (MIP) was used as a receptor. Immobilization of the receptor layer on IDEs provided a suitable sensor for AA detection by measuring changes in electrical parameters including inductance, capacitance, and resistance with the help of LCR meter. In the series and parallel inductance, the lowest detection limits were 0.13 and 0.001 ppm, respectively. While, for series and parallel capacitance, the lowest detection limits were 0.01548 and 1.3698 ppm, respectively. In the case of resistance, the lowest limit of detection was 0.0076 and 0.08121 ppm in series and parallel, respectively. The imprinted polymer‐based sensor showed sensitivity, selectivity, and reversibility for ascorbic acid.

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来源期刊

Surface and Interface Analysis 化学-物理化学

CiteScore

3.30

自引率

5.90%

发文量

130

审稿时长

4.4 months

期刊介绍： Surface and Interface Analysis is devoted to the publication of papers dealing with the development and application of techniques for the characterization of surfaces, interfaces and thin films. Papers dealing with standardization and quantification are particularly welcome, and also those which deal with the application of these techniques to industrial problems. Papers dealing with the purely theoretical aspects of the technique will also be considered. Review articles will be published; prior consultation with one of the Editors is advised in these cases. Papers must clearly be of scientific value in the field and will be submitted to two independent referees. Contributions must be in English and must not have been published elsewhere, and authors must agree not to communicate the same material for publication to any other journal. Authors are invited to submit their papers for publication to John Watts (UK only), Jose Sanz (Rest of Europe), John T. Grant (all non-European countries, except Japan) or R. Shimizu (Japan only).