快速测定热镀锌合金中微量锡  

RAPID DETERMINATION OF TIN IN HOT-DIPPED ZINC ALLOY

作　　者：谈技[1] 高雪艳[1] 杨姣[1] 宗俊[1] 

机构地区：[1]华东师范大学化学系,上海200062

出　　处：《理化检验（化学分册）》2005年第7期477-478,共2页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：锡与二溴羟基苯基荧光酮在有机酸的存在下瞬间即可络合形成橘红色化合物,λmax=515nm,ε=1.48×105L.mol-1.cm-1,锡含量在0~10μg/25mL范围内呈线性关系。大量的锌对测定不造成干扰,合金中其它元素对测定也不干扰。用二溴羟基苯基荧光酮测定热镀锌合金中锡含量的方法具有快速简单和选择性好的特点。A photometric method for the determination of tin(Ⅱ) in hot-dipped zinc alloy was established.In the presence of oxalic acid and Triton X-100, tin(Ⅱ) can instantly form an orange complex with 4,5-dibromohydroxyphenyfluorone (DBHPF). The maximum absorption was at 515nm with molar absorptivity of 1.48×10~5L·mol^(-1)·cm^(-1). Beer′s law was obeyed in the range of 0~10 μg/25 mL of tin(Ⅱ). A large amount of zinc have no interference and the other concomitant ions in hot-dipped zinc alloy also have no interference with the method.

关 键 词：光度法 锡 热镀锌合金 二溴羟基苯基荧光酮 

分 类 号：O657.31[理学—分析化学]