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A new poly(vinylchloride) (PVC) membrane electrode for trace level determination of Co 2+ ions has been developed based on 5-amino-3-methylisothiazole as an ionophore, o-nitrophenyloctylether as a plasticizer and oleic acid (OA) as a good lipophilic additive. The electrode exhibits a Nernstian slope of 29.5±0.2mV/decade in a linear range of 1.0×10 −1 to 6.3×10 −7 M for Co ...
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