Study on a filcilin ion selective electrode
Zhu, S.M.; Jiang, J.H.; Peng, C.Z.
Yao Xue Xue Bao 21(3): 198-203
1986
ISSN/ISBN: 0513-4870 PMID: 3788585 Document Number: 279094
The liquid-membrane and PVC membrane ion-selective electrodes for filcilin were studied. They are based on the use of tetraphenylborate-filcilin ion pair complex as the active material. The PVC membrane electrode showed Nernstian response in 10-2 .apprx. 10-5 M filcilin solution over a pH range of 2.3 .apprx. 6.7 with cationic slope of 58 mV/pC. The electrode showed rapid response, good reproducibility and precision. Using direct potentiometric determination, the recovery of pure filcilin was 99.7% and the standard deviation was .+-. 1.8%, the standard deviation of actual determination of samples was .+-. 0.43. The selectivity coefficient of 24 substances was tested, most of them did not interfere.