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 .
出处
《分析试验室》
CAS
CSCD
北大核心
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
关键词
还原退色
铜(Ⅱ)
偶氮氯膦MA
蒙药
Reduction fading
Copper（Ⅱ）
Chlorophosphonazo mA
Mongolian medicine
