以二环已酮草酰双腙(简写作BCO)为显色剂,采用分光光度法测定硫酸阳极氧化槽液中的铜离子含量。介绍了该方法的原理及分析步骤,探讨了测量波长、酸度、BCO的浓度、发色温度等因素对测量结果的影响。在波长600nm,浓度0～1.4μg/mL范围内测定了吸光度与铜离子浓度之间的关系遵守比耳定律,探讨了干扰元素的影响及其消除方法。 Using dicyclohexanone oxalic acid hydrazone (abbreviated as BCO) as chromogenic reagent, the content of copper ions in sulfuric acid anodic oxidation bath was determined by spectrophotometry. The principle and analysis steps of this method are introduced. The influence of measurement wavelength, acidity, concentration of BCO, color temperature and other factors on the measurement results are discussed. The relationship between absorbance and copper ion concentration was determined at a wavelength of 600 nm and a concentration of 0-1.4 μg / mL. Beer’s law was obeyed, and the influence of interfering elements and its elimination method were discussed.