Abstract
A new selenite ion selective electrode using 4,6-dibromopiaselenole as active material, PVC as membrane matrix and dibutyl phthalate as plasticizer has been developed. An analytically useful potential change occurs from about 10 −6-10 −1 M Se(IV), and the slope of the linear portion is −23.6 mV/10-fold change in Se(IV) concentration at a temperature of 21°. The electrode shows fairly good selectivity for selenite ion over other anions and has been used for the successful determination of total selenium in human hair.
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