M. Ardakani, A. Ensafi, M. Niasari
Jun 26, 2002
Citations
0
Influential Citations
57
Citations
Journal
Analytica Chimica Acta
Abstract
Abstract A highly selective poly(vinyl chloride) (PVC) membrane electrode based on 1,8-dibenzyl-1,3,6,8,10,13-hexaazacyclotetradecane–Ni(II) as a membrane carrier with unique selectivity toward thiocyanate is reported. The influence of membrane composition, pH and foreign anions were investigated. The sensor exhibits a Nernstian response for thiocyanate over a wide concentration range of 3.3×10 −6 to 0.10 M, with a slope 58.4±0.3 mV per decade. The limit of detection is 3.0×10 −6 M SCN − . The sensor has a response time of − ion in comparison to other anions. It was successfully applied to direct determination of thiocyanate in urine and saliva and it was also used as an indicator electrode in titration of thiocyanate with Ag + ions.