用自制二溴苯基萤光酮(DBPF)对铜合金中锡的测定进行了试验。于pH2.2盐酸-氯化钾缓冲液的50毫升显色液中,存在10毫升乙醇、2毫升3×10~(-4)MDBPF溶液、1毫升0.1%CPB乙醇(2+3)溶液所形成的锡-DBPF-CPB三元络合物,15分钟后显色完全,并可稳定80分钟;0—25微克/50毫升锡范围符合比尔定律。对10微克锡,用1毫升混合掩蔽剂 The determination of tin in copper alloy was carried out by using self-made dibromophenylfluorone (DBPF). In 50 ml of pH2.2 HCl-KCl buffer, 10 ml of ethanol, 2 ml of 3 x 10 ~ (-4) MDBPF solution and 1 ml of 0.1% solution of CPB in ethanol (2 + 3) The formed tin-DBPF-CPB ternary complex developed completely after 15 minutes and was stable for 80 minutes; Beer’s law was obeyed at 0-25 μg / 50 ml tin range. For 10 micrograms of tin, mix 1 ml of masking agent