【摘要】 本文研究了1-[（5-溴-2-吡啶）偶氮]-2-萘酚-6-磺酸（以下简称5-Br-PAN-S）与铜（Ⅰ）显色反应的最佳条件。在 pH 值为5.O时。铜（Ⅰ）与试剂形成1:1红色配合物,λ_max=565nm,ε₅₆₅=4.86×10⁴L·mol^-1·cm^-1,0～60μg/25ml 符合比尔定律,不加掩蔽剂可直接用于锡基合金中微量铜的测定,加入掩蔽剂可测定铝合金中的微量铜,平均回收率在97.8%～101.4%之间。更多还原

【Abstract】 The paper is regarding the optimum conditions for colour reaction of 5-Br-PAN-S and copper （Ⅱ）.When pH=5.0,copper（Ⅱ）and reagent form a red fitling ligand with 1:1,λ_max=565nm、ε₅₆₅= 4.86×10⁴ L·mol^-1Cm^-1,0～60μg/25mL conform to the Bill Law.When the screening agent is not added, it can directly used to measure paucity copper in tin-base alloy.When the screening agent is added,the paucity copper in aluminium alloy can be measured by it.The average recovery rate is 97.8%～101.4%.更多还原