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The construction,performance characteristics and application of a new bismuth(Ⅲ) PVC membrane electrode based on 5-(3,4,5-trimethoxyphenyl)-4-amino-1,2,4-triazole-3-thiol are reported in this paper.The designed sensor exhibited a Nernstian response for Bi~(3+) ion ranging from 5.0×10~(-7) mol/L to1.0×10~(-2) mol/L with a slope of 19.8 mV/decade.The operational pH range of the sensor is 3.0-6.0.The electrode shows a response time of 6 s and can be used for at least five weeks without any considerable divergence in potentials.It exhibits very good selectivity relative to a wide variety of alkali,alkaline earth,transition and heavy metal ions.The proposed electrode could be used as an indicator electrode in potentiometric titration of Bi~(3+) ions with EDTA and in the determination of Bi~(3+) content in stomach medicine.
The construction, performance characteristics and application of a new bismuth (III) PVC membrane electrode based on 5- (3,4,5-trimethoxyphenyl) -4-amino-1,2,4-triazole-3-thiol are reported in this The designed sensor showed a Nernstian response for Bi ~ (3 +) ion ranging from 5.0 × 10 -7 mol / L to 1.0 × 10 -2 mol / L with a slope of 19.8 mV / decade. The operational pH range of the sensor is 3.0-6.0. The electrode shows a response time of 6 s and can be used for at least five weeks without any substantial divergence in potentials. It shows very good selectivity relative to a wide variety of alkali, alkaline earth, transition and heavy metal ions. The proposed electrode could be used as an indicator electrode in potentiometric titration of Bi ~ (3+) ions with EDTA and in the determination of Bi ~ (3+) content in stomach medicine.