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。 Sodium acetate medium, excess copper (II) and benzotriazole were added to precipitate, and the remaining copper (II) in the supernatant was determined by flame atomic absorption spectrometry. The working curve method was used to determine the concentration of copper Of benzotriazole. The determination of benzotriazole linear range of 1 2mg / L ~ 30mg / L, the recovery (n = 5) of 98.9 ~ 1 0 1 .0%. The solubility, solubility product and composition ratio of the compounds were also determined.