Electrochemical sensor for the quantification of iodide in urine of pregnant women,Microchimica Acta

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Electrochemical sensor for the quantification of iodide in urine of pregnant women
Microchimica Acta ( IF 5.3 ) Pub Date : 2020-10-06 , DOI: 10.1007/s00604-020-04488-0
Vacharachai Khunseeraksa _{1,

2,

3} , Supatinee Kongkaew _{1,

2,

3} , Panote Thavarungkul _{1,

2,

3} , Proespichaya Kanatharana _{1,

2,

3} , Warakorn Limbut _{1,

2,

4}

Affiliation

An electrochemical method has been developed to determine iodide in urine using an electrode modified with silver oxide microparticles–poly acrylic acid/poly vinyl alcohol (Ag2OMPs-PAA/PVA). Silver oxide particles were formed by electrochemical oxidation via cyclic voltammetry. The modified electrode exhibited an excellent response to iodide detection by cathodic stripping voltammetry. The fabrication and operation conditions were optimized in terms of PVA concentration, K2HPO4 concentration, amount of AgMPs-PAA/PVA, number of cycles for oxide formation, electrolyte, applied potential (vs. Ag/AgCl), and time. Under the optimum conditions, iodide determination produced a linear range from 1 to 40 μM. The limit of detection was 0.3 μM. Precision was found to be within 7.4% RSD. The developed method was applied to the determination of iodide in urine samples of pregnant women with satisfying recoveries (86 ± 1 to 108 ± 1%). Graphical abstract Graphical abstract

中文翻译：

用于定量孕妇尿液中碘化物的电化学传感器

已经开发出一种电化学方法来测定尿液中的碘化物，该方法使用经氧化银微粒-聚丙烯酸/聚乙烯醇 (Ag2OMPs-PAA/PVA) 修饰的电极。通过循环伏安法电化学氧化形成氧化银颗粒。通过阴极溶出伏安法，修饰的电极对碘化物检测表现出极好的响应。在 PVA 浓度、K2HPO4 浓度、AgMPs-PAA/PVA 的量、氧化物形成的循环次数、电解质、施加的电位（相对于 Ag/AgCl）和时间方面优化了制造和操作条件。在最佳条件下，碘化物测定产生 1 至 40 μM 的线性范围。检测限为0.3 μM。发现精度在 7.4% RSD 以内。将所建立的方法应用于孕妇尿样中碘化物的测定，回收率令人满意（86 ± 1 至 108 ± 1%）。图形摘要图形摘要

更新日期：2020-10-06

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