摘要
在硫酸介质中，Ｃｕ（Ⅱ）能催化Ｈ２Ｏ２氧化偶氮胂（Ⅰ）的褪色反应，但加入邻苯二酚后，邻苯二酚能灵敏地阻抑该氧化褪色反应。作者研究了该阻抑褪色反应的动力学条件，从而建立了一种新的测定痕量邻苯二酚的方法。该法的测定范围为０．０～２００ｎｇ／Ｌ，检出限为９０．７ｎｇ／Ｌ。用于实验样品中邻苯二酚的测定，获得了满意的结果。
A spectrophotometric method of inhibitory kinetics for the determination of trace pyrocatechol has been established, based on the inhibitory effect of C16H11O11N2S2Na2As on the decolorization by the oxidation of H2O2 and in the presence of catalysis Cu(). The optimum condition and kinetic parameters of this reaction were studied in detail. The calibration graph is rectilinear from 0.0 to 200 g/L and the detection limit is 90.7 ng/L. It was applied satisfactorily to the determination of trace pyrocatechol in wastewater.
出处
《分析测试学报》
CAS
CSCD
1999年第3期25-28,共4页
Journal of Instrumental Analysis
基金
江西省自然科学基金
关键词
阻抑
动力学光度法
邻苯二酚
测定
Inhibition, Kinetic spectrophotometry, Pyrocatechol
