摘要
研究了新试剂５－（偶氮苯）－８－（４－硝基－１－重氮苯）－氨基喹啉（ＰＡＮＰＡＱ）与铜的显色反应，在弱碱性介质中，吐温－８０存在下，ＰＡＮＰＡＱ与Ｃｕ（Ⅱ）反应生成２∶１紫色络合物，λｍａｘ＝６１５ｎｍ，ε＝５．１９×１０４Ｌ·ｍｏｌ－１·ｃｍ－１，铜含量在０—１５μｇ／２５ｍＬ内符合比耳定律，方法用于生物样品中铜的测定，结果满意。
Color reaction of 5 (phenylazo) 8 (4 nitro 1 phenyldiazo) aminoquinoline(PANPAQ) with copper(Ⅱ) was studied.In the alkaline solution and Tween 80 medium,Cu(Ⅱ) can reacts with PANPAQ to form a violet 2∶1 complex.The malor absorptivity is 5.19×10 4 L·mol -1 ·cm -1 at 615nm.Beer's law is obeyed in the range of 0-15μg/25mL.This method can be applied to the determination of copper in food with satisfactory result.
出处
《光谱实验室》
CAS
CSCD
1998年第6期77-79,共3页
Chinese Journal of Spectroscopy Laboratory
