Kinetic determination of traces of cysteine by its inhibitory effect on the silver-catalysed phloxin-persulphate reaction

Cysteine has an inhibitory effect on the silver-catalysed phloxin-persulphate reaction at pH 5. When the eysteine/silver ratio is < 1, a decrease in the reaction rate is the only observed effect. However, when the ratio is ⪢ 1, an induction period appears. The length of the induction period is pr...

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Published in:Talanta (Oxford) 1985-03, Vol.32 (3), p.221-223
Main Authors: Cordoba, M.Hernandez, Viñas, P., Sanchez-Pedreño, C.
Format: Article
Language:English
Subjects:
cysteine
persulfate
phloxin
silver
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Viñas, P.
Sanchez-Pedreño, C.
description Cysteine has an inhibitory effect on the silver-catalysed phloxin-persulphate reaction at pH 5. When the eysteine/silver ratio is < 1, a decrease in the reaction rate is the only observed effect. However, when the ratio is ⪢ 1, an induction period appears. The length of the induction period is proportional to the cysteine concentration and allows the quantitative determination of cysteine and silver.
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source ScienceDirect Physical & Analytical Chemistry Backfile
subjects cysteine
persulfate
phloxin
silver
title Kinetic determination of traces of cysteine by its inhibitory effect on the silver-catalysed phloxin-persulphate reaction
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