二溴羟基苯基荧光酮荧光熄灭法测定微量锡  

A Fluorescence Quenching Method for the Determination of Trace Tin With Dibromohydroxyphenyofouorone

作　　者：龚国权[1] 王流芳[1] 赵小玲 

机构地区：[1]兰州大学化学系,兰州730000 [2]兰州铁路机械学校

出　　处：《分析化学》1992年第10期1181-1183,共3页Chinese Journal of Analytical Chemistry

摘　　要：本文用荧光熄灭法研究了二溴羟基苯基荧光酮(DBH-PF)-乳化剂OP-Sn体系的测定方法和条件。在0.05～0.20mol/L的盐酸介质中,在乳化剂OP存在下,锡与显色剂形成一种橙红色络合物,其摩尔比为Sn∶DBH-PF=1∶4,λ_(ex)=470nm。λ_(em)=520nm。线性范围为0.2～3.5μg/25ml,检出限为0.2μg/25ml。本法灵敏度高,选择性好,可不经分离检测碳素钢中的微量锡。Tin in carbonsteels was rapidly determined by fluorometric quenching method using dibromohydroxyphenylfluorone (DBH-PF) and emulgent-OP and oxalic acid as reagents. In a 0.05～0.20mol/L hydrochloric acid medium, Sn(Ⅱ or Ⅳ) forms an orange coloured complex with DBH-PF. The molar ratio between Sn and DBH-PF is 1:4. Its maximal excitation wavelength is 400nm, and maximal emission wavelength is 460nm. The linear range is 0.2～3.5μg/ml. The method is selective and highly sensitive to tin.

关 键 词：锡 荧光熄灭法 DBH-PF 

分 类 号：O614.432[理学—无机化学]