摘要
在稀氨水溶液中，以ＫＣｌ溶液为活化剂，过氧化氢与溴甲酚紫的氧化还原反应多铜（Ⅱ）催化，而使吸光度值降低，据此建立了痕量铜的新催化动力学光度法。方法的摩尔吸光系数为５２８×１０５Ｌ·ｍｏｌ－１·ｃｍ－１，检出限为４４４×１０－９ｇ／ｍＬ，线性范围为０～０６μｇ／２５ｍＬ，已用于桂林风景点水中痕量铜（Ⅱ）的测定，结果满意。
A new catalytic spectrophotometric method for determining trace copper(Ⅱ) has been developed.The method is based on the catalytic oxidation of bromocresol purple by H 2O 2 in the media of ammonia water and KCl as an activator.The molar absorption coefficient is 5 28×10 5 L·mol -1 .cm -1 . The limit of detemination is 4 44×10 -9 g/mL. The linear range of determination is 0～0 6 μg/25 mL for copper(Ⅱ).The method has been used to determine trace copper(Ⅱ) in water from scenic spots of Guilin. The results were satisfactory.
出处
《广西科学》
CAS
1998年第3期25-27,共3页
Guangxi Sciences
关键词
铜(Ⅱ)
催化分光光度法
溴甲酚紫
氯化钾
copper(Ⅱ),catalytic spectrophotometry, bromocresol purple,potassium chloride
