Salicylate-Sensitive Membrane Electrode Based on Copper(II) Tetraaza[14]annulene Macrocyclic Complex

A poly(vinyl chloride) membrane electrode with a copper(II) complex of 5,7,12,14-tetramethyldibenzo[b,i][1,4,8,11]tetraazacyclotetradecahexenate (Me 4 DBTA) as the carrier is described. The electrode displays an anti-Hofmeister selectivity sequence with a preferential response towards salicylate and...

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Bibliographic Details
Published in:Analytical letters 1998-09, Vol.31 (12), p.1965-1977
Main Authors: Ying, Min, Yuan, Run, Li, Zhi-Qiang, Song, You-Qun, Shen, Guo-Li, Yu, Ru-Qin
Format: Article
Language:English
Subjects:
Chemistry
Copper(II) Tetraazaannulene
Electrochemistry
Electrodes: preparations and properties
Exact sciences and technology
General and physical chemistry
Ion selective electrodes
Ion-selective electrode
Potentiometry
Salicylate
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Summary:A poly(vinyl chloride) membrane electrode with a copper(II) complex of 5,7,12,14-tetramethyldibenzo[b,i][1,4,8,11]tetraazacyclotetradecahexenate (Me 4 DBTA) as the carrier is described. The electrode displays an anti-Hofmeister selectivity sequence with a preferential response towards salicylate and a linear potentiometric response towards salicylate ion from 2.5 x 10 −6 to 1.0 x 10 −1 mol l −1 with a slope of -57.4 mV dec −1 at pH 5.0. The transfer process of salicylate through the membrane containing Cu(II)-Me 4 DBTA was investigated by an a.c. impedance technique. The electrode has a satisfactory reproducibility and a rapid response time and can be applied to the determination of salicylate in human urine and pharmaceutical preparations.
ISSN:0003-2719
1532-236X
DOI:10.1080/00032719808005278