摘要
在酸性介质中,2,4-二氯苯基荧光酮与Sn(Ⅱ)在草酸存在下瞬间即形成稳定的橘红色络合物.λmax=520 nm,ε=1.10×105,25 mL溶液中锡含量在0～10μg范围内符合比尔定律,据此建立了2,4-二氯苯基荧光酮分光光度法测定微量Sn(Ⅱ)的新方法.此方法选择性高,大量Zn2+和其它共存离子不干扰锡的测定,在实际应用中取得满意效果.
In a acid medium, tin （Ⅱ） can instantly form a stable nacarat complex with 2, 4- dichlorophenyfluorone in the presence of oxalic acid and TritonX-100, which can be determined by spectrophotomety. The maximum absorption of the complex is at 520 nm with molar absorptivity of 1.10×10^5 L·mol^-1·cm^- 1 o Beer＇ s law is obeyed in the range of 0～10 μg/25 mL for tin（Ⅱ）. The method has been applied to the determination of trace tin（Ⅱ） in hot-dipped zinc alloy.
出处
《冶金分析》
CAS
CSCD
北大核心
2005年第5期66-68,共3页
Metallurgical Analysis
