摘要
研究了Cd(Ⅱ)与水杨基荧光酮(SAF)-溴化十二烷基二甲基苄铵(DDMBA)显色反应的条件,在表面活性剂DDMBA存在下,pH 10的硼砂-氢氧化钠缓冲介质中,Cd(Ⅱ)与SAF形成1:4紫红色配合物,配合物于570nm有最大吸收,表观摩尔吸光系数9.26×10~4,镉含量在0～6μg/25ml符合比耳定律,方法简便、灵敏,精密度高,准确度好,应用于铅渣中镉的测定,结果满意。
In a borax buffer solution of pH 10, cadmium ion ( I ) reacts with SAF in the presence of DDMBA to form a stable purple complex. The absorption maxima lies at 570nm. Beer's Law holds in the concentration range of 0~6μg/25ml, and the apparent molar absorptivity calculated is ε_(570) = 9. 26×10~4 L ·mol^(-1) ·cm^(-1). The proposed method has been applied to the determination of cadmium in lead-zinc ore with satisfactory results.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
1998年第8期362-363,共2页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
基金
湖南省教育委员会资助项目
关键词
镉
水杨基荧光酮
显色反应
测定
DDMBA
光度法
Cadmium, Salicyl fluorone, Spectrophotometry, Dodecyl dimethyl benzyl ammonium bromide
