摘要
研究了在溴化十六烷基吡啶存在下，ｐ Ｈ 为５５ 的六次甲基四胺缓冲溶液中，铜（ Ⅱ） 与铬天青 Ｓ的显色反应，据此拟定出一个测定铜的新方法． 铜（ Ⅱ） 在上述体系中形成稳定的绿兰色络合物，最大吸收波长为６２６ ｎｍ ，摩尔吸光系数为６ ．６ ×１０４ ，铜量在０ ．２ ～１ ．８ μｇ／ｍ Ｌ
A new method for determination of copper (Ⅱ) is proposed based on the chromogenic reaction of copper(Ⅱ) and chorme azurol S in solution of hexamethylenetetramine (pH=5.5) with excess amount of hexadecylpyridinium bromide. In this system, copper (Ⅱ) forms a green blue complex, which has an absorption maxinum at 626 nm with a molar absorptivity of 6.6×10 4. Bear's Law is obeyed in the range of 0.2～1.8 μg/mL solution.
出处
《曲阜师范大学学报（自然科学版）》
CAS
1999年第4期76-78,共3页
Journal of Qufu Normal University(Natural Science)
