摘要
乙酸钠介质中 ,加入过量的铜 (Ⅱ )与苯并三氮唑生成沉淀 ,用火焰原子吸收法测定上清液中剩余的铜(Ⅱ ) ,工作曲线法测定了工业合成样品及内燃机冷却水中的苯并三氮唑。该方法测定苯并三氮唑线性范围为1 2mg/L～ 30mg/L ,回收率 (n =5)为 98.9～ 1 0 1 .0 %。文中还测定了难溶化合物的溶解度、溶度积和化合物的组成比。
A new indirect method of determination BTA by Flame Atomic Absorption Spectrometry is discussed in this paper.The determination is based on the precipitation of BTA with copper salt in the presence of ammonium acetate and measurement of the excess free copper.The proposed method proved to be convenient,less in interference and the calibration graph is linear over the range of 1.2 mg/L～30 mg/L BTA,the recovery is between 98.5% and 101.5%.This method is used to determine BTA in industrial samples and cooling water with satisfactory result.The dissolubility,solubility products and the composition of precipitation were determined.
出处
《化学研究》
CAS
2000年第1期45-47,共3页
Chemical Research
关键词
原子吸收法
苯并三氮唑
铜离子
测定方法
Indirect Flame Atomic Absorption Spectrometry
benzotriazole
cooling water
