在聚乙烯醇存在下 ,铜钨杂多酸与维多利亚蓝 (VBB)形成三元离子缔合物 ,表观摩尔吸光系数ε=3.1 0× 1 0 6L· mol-1· cm-1,最大吸收波长位于 590 nm,铜量在 2～ 1 2μg· L-1范围内服从比耳定律 ,摩尔组成比 Cu( )∶W∶VBB=1∶ 1 2∶ 1 ,大多数常见离子不干扰 ,方法用于纯铝和自来水中铜的测定 ,结果满意 In the presence of polyvinyl alcohol, copper-tungsten heteropolyacid forms a ternary ion association with Victoria Blue (VBB) with an apparent molar absorptivity ε = 3.1 × 10 6 L · mol -1 · cm -1. The maximum absorption The wavelength is at 590 nm, the molar ratio of copper in the range of 2 ~ 1 2μg · L-1 obeys Beer’s law, the molar composition ratio Cu (): W: VBB = 1:1 2: 1, most of the common ions do not interfere, Determination of copper in pure aluminum and tap water, the results are satisfactory