Highly selective iodide poly(vinyl chloride) membrane electrode based on a nickel(II) tetraazaannulene macrocyclic complex

A PVC membrane electrode based on a nickel(II) tetraazaannulene macrocyclic complex as the carrier is described. The electrode exhibits an anti-Hofmeister selectivity sequence with a preference for iodide at pH 3.0-4.0. It has a linear response to iodide from 8.0 x 10(-6) to 1 x 10(-1) mol dm-3 with...

Full description

Saved in:
Bibliographic Details
Published in:Analyst (London) 1997, Vol.122 (10), p.1143-1146
Main Authors: YING, M, YUAN, R, ZHANG, X.-M, SONG, Y.-Q, LI, Z.-Q, SHEN, G.-L, YU, R.-Q
Format: Article
Language:English
Subjects:
Biological and medical sciences
Contrast media. Radiopharmaceuticals
Heterocyclic Compounds
Hydrogen-Ion Concentration
Iodides - analysis
Ion-Selective Electrodes
Medical sciences
Membranes, Artificial
Organometallic Compounds
Pharmacology. Drug treatments
Polyvinyl Chloride
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A PVC membrane electrode based on a nickel(II) tetraazaannulene macrocyclic complex as the carrier is described. The electrode exhibits an anti-Hofmeister selectivity sequence with a preference for iodide at pH 3.0-4.0. It has a linear response to iodide from 8.0 x 10(-6) to 1 x 10(-1) mol dm-3 with a slope of -54.7 +/- 0.2 mV per decade (20 degrees C), a satisfactory reproducibility and a rapid response time. The pH dependence of the potential response is discussed. The response mechanism of the electrode was investigated by ac impedance, quartz crystal microbalance and spectroscopic techniques. The electrode can be used for the determination of iodide in drug preparations.
ISSN:0003-2654
1364-5528
DOI:10.1039/a700544j