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首页> 外文期刊>Journal of the Indian Chemical Society >Effect of sodium dodecyl sulphate micelles on the oxidation of L-methionine by chromium(VI) in perchloric acid medium
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Effect of sodium dodecyl sulphate micelles on the oxidation of L-methionine by chromium(VI) in perchloric acid medium

机译:十二烷基硫酸钠胶束对高氯酸介质中铬(VI)氧化L-蛋氨酸的影响

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摘要

The kinetics of oxidation of methionine by chromium(VI) in presence of an anionic surfactant,sodium dodecyl sulphate (SDS) has been studied under pseudo-first order conditions in perchloric acid medium.It was found that increase in [SDS] causes a decrease in rate indicating that the reaction is inhibited by anionic micelles.The critical micelle concentration (CMC) for SDS has been determined in 0.2 mol dm~(-3) ionic strength in presence of the oxidant by surface tension measurements and found to be 4 X10~(-4) mol dm~(-3).Further,the reaction is first order in [chromium(VI)],[methionine] and [H~+].Methionine sulphoxide is identified to be the main product of oxidation.
机译:研究了在假一阶条件下在高氯酸介质中,在阴离子表面活性剂十二烷基硫酸钠(SDS)存在下,铬(VI)氧化蛋氨酸的动力学。研究发现,[SDS]的增加会导致减少。 SDS的临界胶束浓度(CMC)通过表面张力测量在存在氧化剂的情况下以0.2 mol dm〜(-3)离子强度测定,该离子对SDS的临界胶束浓度(CMC)。 〜(-4)mol dm〜(-3)。此外,该反应在[铬(VI)],[蛋氨酸]和[H〜+]中是一级反应。蛋氨酸亚砜被确定为氧化的主要产物。

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