【摘要】 本文研究了铜（Ⅱ）与新显色剂间溴偶氮羧—m的显色反应,在5～20℃试剂与铜形成β型配合物,最大吸收波长为710nm,ε₇₁₀=1.11×10⁵L·mol^-1·cm^-1,显色酸度为pH2.80～3.20,铜含量在0～16μg/25mL服从比耳定律,颜色稳定,操作简便,测定铝合金中铜的结果令人满意。更多还原

【Abstract】 Metabromocarboxyazo—m, a new spectrophotometric reagent has been investigated for the determination of Cu（Ⅱ）, Its colour reaction develops readily at roomtemperature 5～20℃. The coloured complex exhibits maximum absorption at 710nm. Its apparent molar absorptivity has been found to be 1.11×10⁵L·mol^-1.cm^-1. Beer’s law is followed in the range of 0～16 μg/25mL for Cu （Ⅱ）. The method has the advantages of stability and simpticity.更多还原