催化还原褪色光度法测定蒙药中痕量铜(Ⅱ)  

A catalytic reductive fading spectrophotometric method for determination of trace copper(Ⅱ) in Mongolian medicines

作　　者：莎仁[1] 乌都巴拉[1] 

机构地区：[1]内蒙古师范大学化学与环境科学学院,呼和浩特010022

出　　处：《分析试验室》2006年第8期96-99,共4页Chinese Journal of Analysis Laboratory

基　　金：内蒙古自治区自然科学基金(200408020213)资助

摘　　要：在增敏剂溴化十六烷基三甲胺和活化剂α、α-联吡啶存在的条件下，以铜（Ⅱ）催化抗坏血酸还原偶氮氯膦mA褪色为指示反应建立了动力学光度法测定痕量铜的新方法。用固定时间法在554nm处检测催化反应，方法的线性范围为0～0．11μg／mL，检出限6．3×10^-11g／mL，相对标准偏差为3．6％。用于多种蒙药样品中痕量铜的测定。A new kinetic photometric method for the determination of trace amounts of copper is established, based on the discoloring reaction of ascorbic acid reducing chlorophosphonazo-mA, which is catalyzed by Cu（Ⅱ） in the presence of cetyltrimethylammonium bromide and α. α-Dipyridyl. A fixed time method is used to monitor the catalytic reaction at 554 nm. The linear range is 0 - 0.11 μg/mL, the detection limit is 6.3 -10^11 g/mL and relative stardard deviation is 3.6 %. This method has been used for the determination of trace amounts of copper in many kinds of Mongolian medicines and the results obtained are satisfactory .

关 键 词：还原退色 铜(Ⅱ) 偶氮氯膦MA 蒙药 

分 类 号：O657.3[理学—分析化学]