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Determination of L ‐Valine Based on an Oscillating Chemical Reaction
Author(s) -
Gao Jinzhang,
Li Qizhi,
Yang Wu,
Liu Xiuhui,
Ren Jie,
Yang Hua,
Deng Hualing
Publication year - 2002
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/1521-4109(200209)14:17<1191::aid-elan1191>3.0.co;2-9
Subject(s) - valine , hydrogen peroxide , chemistry , sodium thiocyanate , thiocyanate , analytical chemistry (journal) , chromatography , inorganic chemistry , amino acid , organic chemistry , biochemistry
A new analytical method for the determination of L ‐valine by the perturbation caused by different amounts of L ‐valine on the oscillating chemical system, involving the Cu(II)‐catalyzed reaction between hydrogen peroxide and sodium thiocyanate in closed system, is proposed. The method relies on the linear relationship between the changes in the oscillating period and the concentration of L ‐valine. The calibration plot is linear over the range from 2.77×10 −5 to 5.52×10 −4 M. The method features good precision (relative standard deviation: 0.83%). Some aspects of the interaction of L ‐valine with the oscillating chemical system are also discussed.