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基于聚电解质的传感器是实现定量电子舌的关键：检测水性环境基质中的三氯生。

Polyelectrolyte Based Sensors as Key to Achieve Quantitative Electronic Tongues: Detection of Triclosan on Aqueous Environmental Matrices.

作者信息

Magro Cátia, Zagalo Paulo, Pereira-da-Silva João, Pires Mateus Eduardo, Branco Ribeiro Alexandra, Ribeiro Paulo, Raposo Maria

机构信息

CENSE, Departamento de Ciências e Engenharia do Ambiente, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal.

CEFITEC, Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal.

出版信息

Nanomaterials (Basel). 2020 Mar 29;10(4):640. doi: 10.3390/nano10040640.

DOI:10.3390/nano10040640
PMID:32235407
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7221897/
Abstract

Triclosan (TCS) is a bacteriostatic used in household items that promotes antimicrobial resistance and endocrine disruption effects both to humans and biota, raising health concerns. In this sense, new devices for its continuous monitoring in complex matrices are needed. In this work, sensors, based on polyelectrolyte layer-by-layer (LbL) films prepared onto gold interdigitated electrodes (IDE), were studied. An electronic tongue array, composed of (polyethyleneimine (PEI)/polysodium 4-styrenesulfonate (PSS)) and (poly(allylamine hydrochloride/graphene oxide) LbL films together with gold IDE without coating were used to detect TCS concentrations (10-10 M). Electrical impedance spectroscopy was used as means of transduction and the obtained data was analyzed by principal component analysis (PCA). The electronic tongue was tested in deionized water, mineral water and wastewater matrices showing its ability to (1) distinguish between TCS doped and non-doped solutions and (2) sort out the TCS range of concentrations. Regarding film stability, strong polyelectrolytes, as (PEI/PSS), presented more firmness and no significant desorption when immersed in wastewater. Finally, the PCA data of gold IDE and (PEI/PSS) sensors, for the mineral water and wastewater matrices, respectively, showed the ability to distinguish both matrices. A sensitivity value of 0.19 ± 0.02 per decade to TCS concentration and a resolution of 0.13 pM were found through the PCA second principal component.

摘要

三氯生（TCS）是一种用于家居用品的抑菌剂，它会促进人类和生物群的抗微生物性及内分泌干扰效应，引发人们对健康的担忧。从这个意义上说，需要新的设备来对复杂基质中的三氯生进行连续监测。在这项工作中，研究了基于在金叉指电极（IDE）上制备的聚电解质层层（LbL）膜的传感器。使用由（聚乙烯亚胺（PEI）/聚4-苯乙烯磺酸钠（PSS））和（聚烯丙胺盐酸盐/氧化石墨烯）LbL膜组成的电子舌阵列以及未涂层的金IDE来检测三氯生浓度（10⁻¹⁰ M）。采用电阻抗光谱法作为转换手段，并通过主成分分析（PCA）对获得的数据进行分析。该电子舌在去离子水、矿泉水和废水基质中进行了测试，结果表明它能够（1）区分掺杂和未掺杂三氯生的溶液，以及（2）分辨出三氯生的浓度范围。关于膜的稳定性，像（PEI/PSS）这样的强聚电解质表现出更高的稳定性，浸入废水时没有明显的解吸现象。最后，分别针对矿泉水和废水基质的金IDE和（PEI/PSS）传感器的PCA数据显示出区分这两种基质的能力。通过PCA第二主成分发现对三氯生浓度的灵敏度值为每十年0.19±0.02，分辨率为0.13 pM。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a7c3/7221897/bdba5bc5fb33/nanomaterials-10-00640-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a7c3/7221897/3e442e11b031/nanomaterials-10-00640-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a7c3/7221897/04cfc370ab92/nanomaterials-10-00640-g002a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a7c3/7221897/4e1484d34b9b/nanomaterials-10-00640-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a7c3/7221897/40a62509b5de/nanomaterials-10-00640-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a7c3/7221897/4501d092ea95/nanomaterials-10-00640-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a7c3/7221897/e472eaf5a890/nanomaterials-10-00640-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a7c3/7221897/21d486163655/nanomaterials-10-00640-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a7c3/7221897/bdba5bc5fb33/nanomaterials-10-00640-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a7c3/7221897/3e442e11b031/nanomaterials-10-00640-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a7c3/7221897/04cfc370ab92/nanomaterials-10-00640-g002a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a7c3/7221897/4e1484d34b9b/nanomaterials-10-00640-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a7c3/7221897/40a62509b5de/nanomaterials-10-00640-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a7c3/7221897/4501d092ea95/nanomaterials-10-00640-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a7c3/7221897/e472eaf5a890/nanomaterials-10-00640-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a7c3/7221897/21d486163655/nanomaterials-10-00640-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a7c3/7221897/bdba5bc5fb33/nanomaterials-10-00640-g008.jpg

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