5’-硝基水杨基荧光酮分光光度法测定铜合金中微量锑  

Spectrophotometric determination of micro antimony in copper alloys with 5'-nitro-salicylfluorone

作　　者：潘振声[1] 潘教麦[1] 

机构地区：[1]华东师范大学化学系,上海200062

出　　处：《冶金分析》2004年第6期19-21,共3页Metallurgical Analysis

摘　　要：研究了显色剂 5’ 硝基水杨基荧光酮 ( 5’ NSF)光度法测定微量锑的方法。在 0 0 4～ 0 18mol/L磷酸介质中加入适量OP增溶剂 ,锑 (Ⅲ )与 5’ NSF形成 1∶2的橘红色络合物 ,最大吸收波长λmax为 5 18nm ,表观摩尔吸光系数ε =1 0× 10 5,在 2 5mL中 ,锑含量在 0～ 15 μg范围内遵守比尔定律。A spectrophotometric method for the determination of micro antimony in copper alloys with 5'-nitro-salicylfluorone (5'-NSF) was studied.It was found that,in 0.04～0.18 mol/L H_3PO_4 medium,antimony reacted with 5'-NSF to form an orange 1∶2 complex in the presence of OP.The apparent molar absorptivity is 1.0×10~5 L· mol^(-1)·cm^(-1) at 518 nm. Beer's law was obeyed for antimony in the range of 0～15 μg/25 mL.The method has been satisfactorily applied to determine antimony in copper alloys.

关 键 词：水杨基荧光酮 橘红 OP 分光光度法 比尔定律 最大吸收波长 微量 硝基 增溶剂 磷酸介质 

分 类 号：TG115[金属学及工艺—物理冶金]