Sensitive Electrochemical Detection of Nereistoxin by Reductive Desorption from Au(111) and Au(100)
Sensitive Electrochemical Detection of Nereistoxin by Reductive Desorption from Au(111) and Au(100)
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DOI：
10.5796/electrochemistry.84.349
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发表时间：
2016-05
期刊：
影响因子：
2.5
通讯作者：
Katsuhiko Nishiyama;Keisuke Tsuruta;Mizuki Ikeda;Soichiro Yoshimoto;H. Shimada;Yusuke Kitamura;T. Ihara
中科院分区：
文献类型：
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作者：
Katsuhiko Nishiyama;Keisuke Tsuruta;Mizuki Ikeda;Soichiro Yoshimoto;H. Shimada;Yusuke Kitamura;T. Ihara
研究了通过还原脱附对广泛使用的杀虫剂沙蚕毒素（NEX）进行灵敏电化学检测。 NEX 通过其二硫基团吸附在金单晶电极上，形成自组装单层 (SAM)，在碱性溶液中显示还原解吸峰。检测限取决于金的修饰时间和晶体取向。当使用 Au(111) 电极作为底物时，检测限为 10nM。当使用 Au(100) 电极时，该限制降低至 1nM。 Au(111) 和 Au(100) 电极上的 NEX-SAM 也显示出特征还原波，这使得 NEX 能够与其他类似化合物（如氨基乙硫醇、N-二甲基氨基乙硫醇和氨基己硫醇）区分开来。
Sensitive electrochemical detection of nereistoxin (NEX), a widely used insecticide, by reductive desorption is studied. NEX is adsorbed onto a gold single-crystal electrode via its disul fi de group to form a self-assembled monolayer (SAM), which shows a reductive desorption peak in alkaline solution. The detection limit depended on the modi fi cation time and the crystallographic orientation of Au. When a Au(111) electrode was used as a substrate, the limit of detection was 10nM. This limit was decreased to 1nM when a Au(100) electrode was used. The NEX-SAM on a Au(111) and Au(100) electrode also showed a characteristic reductive wave, which allowed NEX to be distinguished from other similar compounds such as aminoethanthiol, N -dimethylaminoethanthiol, and aminohexanethiol.