Issue Information
ماهنامه با شماره پیاپی سال 2005
Pages
-836
From page
837
To page
0
Abstract
A highly selective poly(vinyl chloride) (PVC) membrane electrode based on butane -2,3dione bis(salicylhydrazonato) zinc(II) [Zn (BDSH)] complex as carrier for thiocyanateselective electrode is reported. The influence of membrane composition, pH and possible interfering anions were investigated on the response properties of the electrode. The sensor responds to thiocyanate in linear range from 1.0 * 10-6 to 1.0 * 10-1 M with a slope -56.5 +- 1.1 mV decade^-1, over a wide pH range of 3.5-8.5. The limit of detection of the electrode was 7.0 * 10^-7 M SCN-. Selectivity coefficients determined with fixed interference method (FIM) indicate a good discriminating ability towards SCN- ion in comparison to other anions. The proposed sensor has a fast response time of about 5-15 s and can be used for at least 3 months without any considerable divergence in potential. It was applied as indicator electrode in titration of thiocyanate with Ag+ and in potentiometric determination of thiocyanate in saliva and urine samples.
Journal title
Talanta
Serial Year
2005
Journal title
Talanta
Record number
111442
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