酱油中痕量镉的共沉淀分离富集原子吸收测定  

Determination of Cadmium in Soy by Flame Atomic Absorption Spectrometry After Coprecipitation Separation

作　　者：苏耀东[1] 边永强[1] 顾树春 倪亚明[1] 

机构地区：[1]同济大学化学系微量元素研究所,上海200092

出　　处：《分析化学》1992年第6期698-700,共3页Chinese Journal of Analytical Chemistry

摘　　要：研究了用PAN-Ni(Ⅰ)体系共沉淀分离富集酱油消解液中的痕量镉,再用微量注射进样FAAS测定的方法。在pH10的溶液中,检测下限可达1.05×10^(-3)μg/ml,线性范围为1.05×10^(-3)～0.125μg/ml,共存物质不干扰测定。方法快速、简便、稳定,具有良好的重现性和回收率。A new method has been studied for the separation of Cd in soy with 1-(2-pyridylazo)-2-naphthol-Ni(Ⅱ)coptecipitation and the determination of Cd by FAAS with micro-injection sampling. The derection limit of the method proposed is 1.05×10^(-3) μg/ml at pH 10.The calibration curve is linear in the range of 1.05×10^(-3)～0.125μg/ml. No interference was observed from coexistent elements. The method is rapid, simple with good reproducibility and high accuracy.

关 键 词：镉 原子吸收光谱 分离方法 酱油 

分 类 号：TS264.21[轻工技术与工程—发酵工程]