Self-Assembled Monolayers in Electroanalytical Chemistry: Application of ω-Mercaptocarboxylic Acid Monolayers for Electrochemical Determination of Ultralow Levels of Cadmium(II)

Iva Turyan, Daniel Mandler*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

158 Scopus citations

Abstract

Self-assembled monolayers of ω-mercaptocarboxylic acids, HS- (CH2)nCO2H (n = 1,2,5,10), on mercury film (MF) and gold electrodes have been used for the very sensitive and selective analysis of ultralow levels of cadmium(II). We find that shorter ω-mercaptocarboxylic acids provide superior sensitivity. Other parameters that govern the sensitivity and selectivity of this system have been examined in detail. Optimizing these factors resulted in a detection limit of 4 × 10−12 M (0.45 ppt). The method has been verified by determining cadmium in standard solutions and it has been successfully applied to the analysis of cadmium in seawater.

Original languageAmerican English
Pages (from-to)58-63
Number of pages6
JournalAnalytical Chemistry
Volume66
Issue number1
DOIs
StatePublished - 1 Jan 1994

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