Bismuth (III) PVC membrane ion selective electrodes based on two compounds: Acylhydrazone and thiosemicarbazone with 1,3,4-thiadiazole

作者：Yan Zhenning^*; Wang Shuangqiang; Wang Haixia; Wu Shuangyan

来源：Materials Science and Engineering: C , 2013, 33(5): 2562-2568.

DOI：10.1016/j.msec.2013.02.017

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

Two Bi3+ selective electrodes based on L1 and L2 incorporated into a polyvinylchloride (PVC) membrane have been developed. The ionophores L1 and L2 are 2-(5-amino-1,3,4-thiadiazol-2-ylthio)-N'-benzylidene acetohydrazone and 1-(2-(5-amino-1,3,4-thiadiazol-2-ylthio) acetyl)-4-benzoylthiosemicarbazone, respectively. These electrodes are composed of dioctylphtalate COOP) as a plasticizer and sodium tetraphenylborate (NaTPB) as the lipophilic additive. The best performance was obtained with the membrane compositions of L1 (030): PVC (3322): DOP (6636): NaTPB (0.12) (%, w/w) and L2 (1.00): PVC (33.00): DOP (65.91): NaTPB (0.09) (%, w/w). Two membrane electrodes show Nernstian response slopes towards Bi3+ (20.2 and 19.7 mV/decade, respectively) over the concentration range of 10(-7)-10(-3) and 10(-7)-10(-2) M, respectively. The effects of the pH and the possible interfering cations were investigated. Both electrodes have a response time of about 10 s, and they can work in a certain concentration aqueous ethanol solution. The prepared electrodes were used as an indicator electrode in potentiometric titration of Bi3+ ions with EDTA. The membrane sensors were also applied to the determination of Bi3+ content in compound bismuth aluminate tablets.

• 出版日期2013-7-1
• 单位郑州大学