A bismuth(III) PVC membrane ion selective electrode based on 5-(3,4,5-trimethoxyphenyl)-4-amino-1,2,4-triazole-3-thiol

作者：Wang, Hai-Xia; Yan, Zhen-Ning; Wen, Xiang-Li; Kang, Yun-Xia; Zhang, Shuang-Yan

来源：Chinese Chemical Letters, 2015, 26(9): 1147-1149.

DOI：10.1016/j.cclet.2015.04.036

• Bi3+
• PVC-membrane
• Ion-selective electrode
• Potentiometry
• lonophore

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 Bi3+ ion ranging from 5.0 x 10(-7) mol/L to 1.0 x 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 Bi3+ ions with EDTA and in the determination of Bi3+ content in stomach medicine.

• 出版日期2015-9
• 单位郑州大学