Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Applied & Environmental Chemistry, College of Chemistry, Central China Normal University, Wuhan 430079, PR China.
Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Applied & Environmental Chemistry, College of Chemistry, Central China Normal University, Wuhan 430079, PR China.
Talanta. 2018 May 1;181:147-153. doi: 10.1016/j.talanta.2018.01.005. Epub 2018 Jan 3.
Owing to the lack of chromophores and ionizable functional groups, it is a significant challenge to determine perfluorooctane sulfonyl fluoride (PFOSF) by traditional high-performance liquid chromatography or liquid chromatography/mass spectrometry, especially at a low concentration. In this work a unique photoelectrochemical (PEC) sensing strip has been developed for the first time for the detection of PFOSF. The sensing strip is cost effective and disposable, whereby BiOI nanoflake arrays are fabricated on a home-made screen-printed electrode through a facile one-step in-situ electrodeposition process, and then the molecule tags (i.e., molecularly imprinted polymers) for PFOSF are subsequently grafted on the surface. Benefitting from a three-dimensional interconnected framework, the as-fabricated sensing strip has a rapid response to the interfacial steric hindrance effect between the sensing platform and the target analyte of PFOSF. The elaborated PEC sensor exhibits a outstanding linear response to a concentration of PFOSF ranging from 0.05 to 500.0 ppb and a detection limit down to 0.01 ppb (S/N = 3) Furthermore, our low-cost and highly sensitive sensor has been further explored to detect PFOSF in real water samples, showing satisfactory results.
由于缺乏发色团和可离子化的官能团，传统的高效液相色谱或液相色谱/质谱法，特别是在低浓度下，很难确定全氟辛烷磺酰氟 (PFOSF)。在这项工作中，首次开发了一种独特的光电化学 (PEC) 传感条，用于检测 PFOSF。传感条具有成本效益和一次性使用的特点，通过简单的一步原位电沉积工艺在自制的丝网印刷电极上制备 BiOI 纳米片阵列，然后将用于 PFOSF 的分子标记物（即分子印迹聚合物）接枝到表面。得益于三维互连的框架，所制备的传感条对传感平台和 PFOSF 目标分析物之间的界面空间位阻效应具有快速响应。详细阐述的 PEC 传感器对 0.05 至 500.0 ppb 范围内的 PFOSF 浓度表现出出色的线性响应，检测限低至 0.01 ppb（S/N = 3）。此外，我们的低成本和高灵敏度传感器已进一步用于检测实际水样中的 PFOSF，结果令人满意。
