Iodide-Selective PVC Membrane Electrodes Based on Five Transitional Metal Chelates ofbis-furfural-semi-o-tolidine
作者:
Zhi-Qiang Li,
Ruo Yuan,
Min Ying,
You-Qun Song,
Guo-Li Shen,
Ru-Qin Yu,
期刊:
Analytical Letters
(Taylor Available online 1997)
卷期:
Volume 30,
issue 8
页码: 1455-1464
ISSN:0003-2719
年代: 1997
DOI:10.1080/00032719708001667
出版商: Taylor & Francis Group
关键词: potentiometry;iodide-selective membrane electrodes;bis-furfural-semi-o-tolidine;transitional metal chelates
数据来源: Taylor
摘要:
Some new PVC membrane electrodes based on Co(II), Mn(II), Ni(II), Cu(II), and Zn(II)chelates of bis-furfural-semi-o-tolidine as carriers are described. The electrodes exhibited different selectivity behaviour compared with the electrode using a classical anion exchanger such as tetraalkyl ammonium. The results showed that the Cobalt(II) chelate-based electrodes had a Nernstian response to iodide ion ranging from 1.0 × 10−1to 1.0 × 10−6mol.L−1in a phosphate buffer solution of pH 2.0 with a detection limit of 6.4 × 10−7mol.L−1and a slope of 57.8 mV/dec at 25deg;C. The response mechanism was also investigated by use of both a.c. impedance and SPQC techniques. The Co(II) chelate-based electrodes were used to determine the iodide content of a drug with satisfactory results.
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