动力学光度法测定痕量氨三乙酸  

Determination of Trace Nitrilotriacetic Acid with the Kinetics Photometry Method

作　　者：黄天利[1] 郭利兵 张海洋 

机构地区：[1]焦作师范学院,河南焦作454000 [2]河南化学研究所,郑州450002

出　　处：《河南科学》2008年第6期665-667,共3页Henan Science

基　　金：河南省科技攻关资助课题(072102140006)

摘　　要：在乙酸介质中,微量氨三乙酸对高碘酸钾氧化玫瑰桃红R的反应有显著的抑制作用,据此建立了阻抑动力学光度法测定氨三乙酸的新方法,方法的线性范围为0.01～0.12μg/mL,检出限达到2.3×10-3μg/mL,是目前测定氨三乙酸最灵敏的动力学方法.本法简便快速,灵敏度高,用于合成样品和实验室废水中痕量氨三乙酸的测定,结果满意.The spectrophotometric method of inhibitory kinetics for the determination of trace nitrilotriacetic acid has been established, based on the inhibitory effect of rose pink R on the decolorization by the oxidation of potassium periodate. The optimum condition and kinetif parameters of this reaction were studied in detail. The calibration graph is rectilinear from 0.01-0.12 μg/mL and the detection limit is 2.3×10-3 μg/mL. It was applied satisfactorily to the determination of trace nitrilotriacetic acid in in tap water and wastewater in experimental laboratory.

关 键 词：阻抑催化动力学光度法 玫瑰桃红R 氨三乙酸 

分 类 号：O657[理学—分析化学]