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Electrochemosensor for Trace Analysis of Perfluorooctanesulfonate in Water Based on a Molecularly Imprinted Poly(o-phenylenediamine) Polymer
ACS Sensors ( IF 8.2 ) Pub Date : 2018-06-18 00:00:00 , DOI: 10.1021/acssensors.8b00154 Najmeh Karimian 1 , Angela M. Stortini 1 , Ligia M. Moretto 1 , Claudio Costantino 1 , Sara Bogialli 2 , Paolo Ugo 1
ACS Sensors ( IF 8.2 ) Pub Date : 2018-06-18 00:00:00 , DOI: 10.1021/acssensors.8b00154 Najmeh Karimian 1 , Angela M. Stortini 1 , Ligia M. Moretto 1 , Claudio Costantino 1 , Sara Bogialli 2 , Paolo Ugo 1
Affiliation
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This work is aimed at developing an electrochemical sensor for the sensitive and selective detection of trace levels of perfluorooctanesulfonate (PFOS) in water. Contamination of waters by perfluorinated alkyl substances (PFAS) is a problem of global concern due to their suspected toxicity and ability to bioaccumulate. PFOS is the perfluorinated compound of major concern, as it has the lowest suggested control concentrations. The sensor reported here is based on a gold electrode modified with a thin coating of a molecularly imprinted polymer (MIP), prepared by anodic electropolymerization of o-phenylenediamine (o-PD) in the presence of PFOS as the template. Activation of the sensor is achieved by template removal with suitable a solvent mixture. Voltammetry, a quartz crystal microbalance, scanning electron microscopy and elemental analysis were used to monitor the electropolymerization process, template removal, and binding of the analyte. Ferrocenecarboxylic acid (FcCOOH) has been exploited as an electrochemical probe able to generate analytically useful voltammetric signals by competing for the binding sites with PFOS, as the latter is not electroactive. The sensor has a low detection limit (0.04 nM), a satisfactory selectivity, and is reproducible and repeatable, giving analytical results in good agreement with those obtained by HPLC-MS/MS analyses.
中文翻译：
基于分子印迹聚邻苯二胺聚合物的痕量分析水中全氟辛烷磺酸的电化学传感器
这项工作旨在开发一种电化学传感器，用于灵敏和选择性地检测水中痕量的全氟辛烷磺酸盐（PFOS）。全氟烷基物质（PFAS）对水的污染由于其可疑的毒性和生物蓄积能力而成为全球关注的问题。PFOS是主要关注的全氟化化合物，因为它的建议控制浓度最低。此处报道的传感器基于金电极，该电极修饰有分子印迹聚合物（MIP）的薄涂层，该涂层是通过阳极的阳极电聚合制备的。-在全氟辛烷磺酸的存在下，以邻苯二胺（o-PD）为模板。传感器的激活是通过使用合适的溶剂混合物除去模板来实现的。伏安法，石英晶体微量天平，扫描电子显微镜和元素分析用于监测电聚合过程，模板去除和分析物结合。二茂铁羧酸（FcCOOH）已被用作一种电化学探针，能够通过与PFOS竞争结合位点来生成分析上有用的伏安信号，因为后者不具电活性。该传感器具有低检测限（0.04 nM），令人满意的选择性，并且可重现和可重复，其分析结果与通过HPLC-MS / MS分析获得的结果吻合良好。
更新日期：2018-06-18
中文翻译：
基于分子印迹聚邻苯二胺聚合物的痕量分析水中全氟辛烷磺酸的电化学传感器
这项工作旨在开发一种电化学传感器，用于灵敏和选择性地检测水中痕量的全氟辛烷磺酸盐（PFOS）。全氟烷基物质（PFAS）对水的污染由于其可疑的毒性和生物蓄积能力而成为全球关注的问题。PFOS是主要关注的全氟化化合物，因为它的建议控制浓度最低。此处报道的传感器基于金电极，该电极修饰有分子印迹聚合物（MIP）的薄涂层，该涂层是通过阳极的阳极电聚合制备的。-在全氟辛烷磺酸的存在下，以邻苯二胺（o-PD）为模板。传感器的激活是通过使用合适的溶剂混合物除去模板来实现的。伏安法，石英晶体微量天平，扫描电子显微镜和元素分析用于监测电聚合过程，模板去除和分析物结合。二茂铁羧酸（FcCOOH）已被用作一种电化学探针，能够通过与PFOS竞争结合位点来生成分析上有用的伏安信号，因为后者不具电活性。该传感器具有低检测限（0.04 nM），令人满意的选择性，并且可重现和可重复，其分析结果与通过HPLC-MS / MS分析获得的结果吻合良好。
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