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在乙酸 -乙酸钠介质中痕量铜对抗坏血酸还原二溴对甲基偶氮羧 (2 - Br- p MAC)褪色反应有催化作用 ,催化程度与 Cu( )量线性相关。借此建立了测定痕量 Cu( )的分光光度法。实验表明 ,有色溶液的最大吸收波长为 586nm,方法检出限为 0 .0 4 8μg/L,Cu( )量在 0～ 0 .8μg/50 m L范围内符合比耳定律 ,可用于测定煤矸石中的微量铜
Trace amounts of copper on the acetic acid - sodium acetate media catalyzed the ascorbic acid reduction of dibromo - methylcarboxylazo (2 - Br - p MAC) fading reaction, and the degree of catalysis was linearly related to Cu (superscript 2 +). In this way, a spectrophotometric method for the determination of trace Cu () has been established. Experiments show that the maximum absorption wavelength of the colored solution is 586 nm, the detection limit of the method is 0.048 μg / L, and the Cu (superscript 2 +) is in the range of 0 ~ 0.8 μg / 50 m L. Beer ’ Trace amount of copper in the waste rock