【摘要】 在pH6.8的磷酸盐缓冲液中,在OP和乙醇存在下.Cu（Ⅱ）和邻苯二酚紫与罗丹明6G形成稳定的紫红色离子缔合物,最大吸收波长λ_max=560nm,表观摩尔吸光系数ε=5.1×10⁴L·mol^-1·cm^-1.Cu（Ⅱ）在0～15μg/25ml范围内符合比耳定律,所拟方法用于茶叶和面粉中微量铜的测定,结果满意.更多还原

【Abstract】 It is found that in a phosphate buffer of pH 6. 8 and in the presence of OP and ethyl alcohol. a stable reddish violet ion association complex is formed between Cu（ I ）, pyrocatechol violet and rhodamine 6G. Under the optimum condition, the composition of this complex is : Cu（ I ） : PV: RD6G=1: 1: 2. Beer’s law-holds over the range of 0¹5礸 of copper per 25ml with a molar absorptivity of 5.1?10¹L ?mol^-1 ?cm^-1. The proposed method has been used in the determination of microamounts of copper in. tea and wheat flour.更多还原