摘要
基于Ｇａ（Ⅲ）置换Ｆｅ（Ⅱ）－ＥＤＴＡ配合物中Ｆe（Ⅱ）的反应与Ｆｅ(Ⅱ)-鲁米诺-溶解氧的化学发光反应相偶合,建立了一种流动注射化学发光测定痕量镓的新方法。本法线性范围1x１０－(６)1ｘ１０－(4)ｍｏｌ/L，相对标准偏差为２．６％（ｎ＝１１，Ｃ＝１０－(5)g/mL），检出限为７ｘ１０-(9)g/mL。本法用于中草药中痕量镓的测定。结果令人满意。
A new flowing injection chemiluminescence method for determination of gallium has been developed, based on coupling reaction of replacing Fe (Ⅱ ) in the Fe (Ⅱ ) -- EDTA ,mixture with Ga (Ⅲ ) andchemiluminescence reaction of the Fe (Ⅱ ) --O2 --Luminol. In this method, the linear range for the determination of Ga (Ⅲ ) is from 1 x 10-6 mol/L to 1 x 10-4 mol/L, the relative standard difference is 2.6%(n = l, C = 1 x 10-5 g/mL), the detect limit is 7 x 10-9g/ml. The method has been used to determination of gallium in the traditional Chinese medicine and a satisfactory result has been obtained.
出处
《广东微量元素科学》
CAS
1999年第1期50-53,共4页
Trace Elements Science
