摘要
研究了铜试剂光度法测定中成药中微量铜，在ｐＨ９～１１条件下，铜试剂与铜、ＯＰ形成三元配合物，其最大吸收波长４４３ｎｍ，铜含量在００２８～４７０μｇ／ｍｌ范围内遵从比耳定律，表观摩尔吸光系数为１３２×１０３ｍ２／ｍｏｌ，研究了多种共存离子的影响及其干扰的消除方法，应用于红花、赤芍、施尔康中铜的测定，取得了满意的结果。
A spectrophotometric determination of trace copper in chinese medicines using the diethyldithiocarbamate (DDTC) was inrestigated In the pH range of 9 to 11,copper reacts with DDTC and OP to form a ternary complex with λ max 443nm and ε 433 1 32×10 3m 2 mol -1 Beer′s law is obeyed in the range of 0 028 to 4 70 μg copper(Ⅱ) per mL Effect of coesisting ions on determination of copper and elimination of interference of some metal ions were studied Satisfactory results have been achieved in applying the method to the spectrophotometricdetermination of trace copper in Chinese medicines such as safflower,chishao and shierkang
出处
《南京化工大学学报》
1996年第3期58-62,共5页
Journal of Nanjing University of Chemical Technology(Natural Science Edition)
关键词
铜
试剂
分光光度法
测定
中成药
中药化学
diethyldithiocarbamate(DDTC) copper spectrophotometry determination safflower chishao shierkany
