Department of Polymer Science and Technology, University of Calcutta, 92 A.P.C. Road, Kolkata-700009, West Bengal, India.
Ecotoxicol Environ Saf. 2010 Sep;73(6):1495-501. doi: 10.1016/j.ecoenv.2010.07.004. Epub 2010 Jul 22.
In this study, rapid electrochemical sensing systems for detection of arsenate by oxidation of L-cysteine are proposed. Three different sensing systems comprising of screen-printed electrode and standard electrodes were used for this study. The detector element i.e. L-cysteine was immobilized on the working electrodes of the transducers by in-situ polymerization of acylamide. The electrocatalytic oxidation of L-cysteine was performed by cyclic voltammentry and amperometry. All the systems presented linear response range up to 30 microgL(-1) of arsenic. The sensors were able to estimate arsenic below 10 microgL(-1) with a detection limit of 1.2-4.6 microgL(-1).
本研究提出了一种通过氧化 L-半胱氨酸来检测砷酸盐的快速电化学传感系统。该研究使用了三种不同的传感系统，包括丝网印刷电极和标准电极。将检测器元件 L-半胱氨酸通过原位聚合酰亚胺固定在传感器的工作电极上。通过循环伏安法和安培法进行 L-半胱氨酸的电催化氧化。所有系统均呈现出线性响应范围，最高可达 30 μg/L 的砷。这些传感器能够估计低于 10 μg/L 的砷，检测限为 1.2-4.6 μg/L。
