摘要
A kinetic spectrophotometric method for the determination of trace dichlovos based on its catalytic oxidation of benzidine with H2O2 in the presence of weak acidity buffer medium of citric acid and sodium citrate was investigated.The reaction formed a yellow complex,which had a maximum absorptive peak at 410 nm with an apparent molar absorptivity being 1.39×104 L·mol-1·cm-1,Beer’s law is obeyed in the range of 0-100μg/10mL for dichlovos.The reaction was rapid and the absorbance of complex can be stable for at least 12h.So it was applied to determine dichlovos directly.
A kinetic spectrophotometric method for the determination of trace dichlovos based on its catalytic oxidation of benzidine with H2O2 in the presence of weak acidity buffer medium of citric acid and sodium citrate was investigated. The reaction formed a yellow complex,which had a maximum absorptive peak at 410 nm with an apparent molar absorptivity being 1.39× 10^4 L ·mol^-1 ·cm^-1, Beer＇s law is obeyed in the range of 0 - 100μg/10mL for diehlovos. The reaction was rapid and the absorbance of complex can be stable for at least 12h. So it was applied to determine diehlovos directly.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2005年第6期820-821,824,共3页
Chemical Research and Application
基金
重庆市教育委员会科学技术研究资金资助项目(031402)
