Optical sensing of 3-phenoxybenzoic acid as a pyrethroid pesticides exposure marker by surface imprinting polymer capped on manganese-doped zinc sulfide quantum dots

Vivek Pandey , Abhishek Chauhan , Gajanan Pandey , Mohana Krishna Reddy Mudiam
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引用次数: 10

Abstract

The present communication deals with the synthesis of luminescent Mn-doped ZnS quantum dots (QDs) anchored to surface imprinted polymer for the optical sensing of 3-phenoxy benzoic acid (3-PBA) in urine samples. The combination of sensing and surface functionalization not only improves the selectivity of the method, but also increases the optosensing ability of the material for non-phosphorescent substances. The developed material was utilized for the selective and sensitive detection of 3-PBA in urine samples. The proposed method shows good linearity with a regression coefficient (R2) of 0.98. The limit of detection was found to be 0.117 μM. The method has an acceptable precision and accuracy which are found to be less than 8% and 80–90% respectively at three different concentrations. The quenching constant of quantum dot-molecular imprinted polymer was found to be 3.4 times higher to that of the quantum dot-non imprinted polymer (QD-NIP) as calculated by Stern–Volmer equation. The sensing method developed has shown immense utility to detect 3-PBA in complex biological samples like urine.

Abstract Image

锰掺杂硫化锌量子点表面印迹聚合物对3-苯氧苯甲酸作为拟除虫菊酯农药暴露标记物的光学传感
本文研究了锚定在表面印迹聚合物上的发光mn掺杂ZnS量子点(QDs)的合成,用于尿液样品中3-苯氧苯甲酸(3-PBA)的光学传感。传感和表面功能化的结合不仅提高了方法的选择性,而且增加了材料对非磷光物质的光传感能力。该材料可用于尿液样品中3-PBA的选择性和敏感性检测。该方法线性良好,回归系数(R2)为0.98。检测限为0.117 μM。该方法精密度和准确度均可接受,在三种不同浓度下精密度和准确度分别小于8%和80-90%。根据Stern-Volmer方程计算,量子点-分子印迹聚合物的猝灭常数比量子点-非印迹聚合物(QD-NIP)高3.4倍。所开发的传感方法在检测尿液等复杂生物样品中的3-PBA方面显示出巨大的实用性。
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