由于2,9-二甲基-1,10邻二氮杂菲结构的位阻效应,与铜(Ⅰ)具有特效性反应,成为测定微量铜的高选择性方法。但由于灵敏度不离(ε_(460)=7.9×10~5),使其应用受到限制。近年来,在保持此法高选择性基础上进一步提高其灵敏度的工作有很大进展。我们采用铜—2,9-二甲基-1,10-邻二氮杂菲-荧光桃红缔合型三元络合物测定合金中的微量铜,方法简便、准确,兼有高灵敏、高选择的特点。实验部分一仪器与试剂 721型分光光度计(上海第三分析仪器厂) 2,0-二甲基-1,10-邻二氮杂菲(DMP):0.1%乙 Due to the steric hindrance of 2,9-dimethyl-1,10-phenanthroline structure, it has a specific reaction with copper (Ⅰ), which has become a highly selective method for the determination of trace copper. However, the sensitivity is not (ε_ (460) = 7.9 × 10 ~ 5), so its application is limited. In recent years, great progress has been made in further enhancing its sensitivity on the basis of maintaining the high selectivity of this law. We use copper-2, 9-dimethyl-1, 10-phenanthroline-fluorescein associative ternary complex determination of trace copper in the alloy, the method is simple, accurate, both highly sensitive, high Choose the features. Experimental part of an instrument and reagent 721 spectrophotometer (Shanghai Third Analytical Instrument Factory) 2,0-dimethyl-1,10-phenanthroline (DMP): 0.1% B