Effect of Pyruvate on the Redox Behavior of the Iron (III)-(II) Couple
作者:
J.J. Kim,
T.E. Cummings,
J.A. Cox,
期刊:
Analytical Letters
(Taylor Available online 1972)
卷期:
Volume 5,
issue 10
页码: 703-715
ISSN:0003-2719
年代: 1972
DOI:10.1080/00032717208064351
出版商: Taylor & Francis Group
关键词: iron;pyruvate;complexation;chemical reduction;voltammetry
数据来源: Taylor
摘要:
Evidence for the formation of Fe(III) and Fe(II) complexes with pyruvate ion is presented. Complexes with a 1:2 ratio of Fe(II) to pyruvate and 1:1 ratio of Fe(III) to pyruvate were identified by spectrophotometry. The complexation results in partial kinetic control of the electrochemical oxidation of Fe(II) in citrate buffer. In addition, Fe(III) was found to be chemically reduced by pyruvate. The apparent first order rate constant at 25[ddot]C is 7.12 × 10−2s−1in pH 4.0 pyruvate buffer and 1.24 × 10−1s−1in pH 3.2 pyruvate buffer. In pH 4.0 citrate buffer the reaction is not first order and is significantly slower.
点击下载:
PDF (369KB)
返 回