Self-assembled monolayers in electroanalytical chemistry: Application of ω-mercaptocarboxylic acid monolayers for electrochemical determination of ultralow levels of cadmium(II).

Date Published:

1994///

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 anal. of ultralow levels of cadmium(II). The authors find that shorter ω-mercaptocarboxylic acids provide superior sensitivity. Other parameters that govern the sensitivity and selectivity of this system have been examd. in detail. Optimizing these factors resulted in a detection limit of 4 × 10-12 M (0.45 ppt). The method has been verified by detg. cadmium in std. solns. and it has been successfully applied to the anal. of cadmium in seawater. [on SciFinder(R)]

Notes:

CAPLUS AN 1994:44681(Journal)