Electrochemistry
Online ISSN : 2186-2451
Print ISSN : 1344-3542
ISSN-L : 1344-3542
Articles
Sensitive Electrochemical Detection of Nereistoxin by Reductive Desorption from Au(111) and Au(100)
Katsuhiko NISHIYAMAKeisuke TSURUTAMizuki IKEDASoichiro YOSHIMOTOHiroshi SHIMADAYusuke KITAMURAToshihiro IHARA
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JOURNALS OPEN ACCESS

2016 Volume 84 Issue 5 Pages 349-353

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Abstract

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 disulfide group to form a self-assembled monolayer (SAM), which shows a reductive desorption peak in alkaline solution. The detection limit depended on the modification time and the crystallographic orientation of Au. When a Au(111) electrode was used as a substrate, the limit of detection was 10 nM. This limit was decreased to 1 nM 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.

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© 2016 The Electrochemical Society of Japan
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