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Potentiometric micro determination of some metal ions using chloranilate PVC matrix membrane electrodes.
Faculty
Science
Year:
1997
Type of Publication:
Article
Pages:
475-487
Authors:
Elmosallamy, MAF
Journal:
ANALYTICAL LETTERS MARCEL DEKKER INC
Volume:
30
Research Area:
Chemistry
ISSN
ISI:A1997WL67700005
Keywords :
chloranilate ion selective electrodes, solvent mediators, potentiometric titration, metal ion determination
Abstract:
Chloranilate PVC matrix membrane electrodes have been developed. These are based on the use of aliquat-chloranilate ion pair in plasticized PVC matrices. The calibration slope is about 60 mV/decade. The limit of detection is about 10(-5) M, the working pH range is 5-10, the electrodes have been used in the determination of lead, mercury, and cadmium ions with chloranilic acid, separately and in binary mixtures. 2-Nitro phenyl octyl ether, 2-nitro phenyl phenyl ether, dioctyl phthalate, dioctylsebacate, dioctyl phenyl phosphonate plasticizers are used; there were no significant differences in the performance characteristics of membranes for the various plasticizers. The life time of the electrodes is greater than one month.
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