摘要
研究了汞与邻羟基苯基重氮氨基偶氮苯(HBDAB)的显色反应。在Na2B2O7-Na2CO3缓冲溶液中有OP乳化剂存在下,Hg(Ⅱ)与HBDAB形成1:3橙红色配合物,其最大吸收峰位于515nm波长处,表观摩尔吸光系数为1.36×105L·mol-1·cm-1,Hg(Ⅱ)在0～20μg/25ml范围内符合比耳定律,方法应用于中草药中痕量汞的测定,结果满意。
In an alkaline solution buffered at pH 11 with Na2B4O7-Na2CO3 buffer solution, and in the presence of the non-ionic surfactant OP, mercury(Ⅱ) reacts with HBDAB to form a reddish colored complex having its absorption maxima at 515nm, and an apparent molar absorptivity of (∈515) 1. 36×105L ·mol-1·cm-1. Beer s law holds in the range of 0-20μg of Hg(Ⅱ) per 25ml of solution. The proposed method has been satisfactorily used in the determination of Hg(Ⅱ) in water and in some Chinese traditional drugs.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2003年第8期480-481,484,共3页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
