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在氨水介质中 ,微量铜可催化亚硝酸钠氧化依来络兰黑 R褪色 ,由此建立了一种高灵敏度光度法测定微量铜的方法。间接摩尔吸光系数 ε530 =2 .5× 1 0 6L· mol-1·cm-1,线性范围为 0～ 8μg/2 5ml,线性回归方程 ΔA=0 .0 1 2 3C+0 .0 0 76,r=0 .9994,方法用于环境废水中微量铜的测定 ,选择性好 ,灵敏度高 ,结果满意
In ammonia medium, a trace amount of copper can catalyze the oxidation of iridium blue and blue R of sodium nitrite, and a high sensitivity spectrophotometric method for the determination of trace copper has been established. The indirect molar absorptivity ε530 = 2.5 × 106L · mol-1 · cm-1, linear range of 0 ~ 8μg / 2 5ml, linear regression equation ΔA = 0.012 2C +0.076, r = 0.9994. The method was applied to the determination of trace copper in environmental wastewater with good selectivity and high sensitivity, with satisfactory results