N-戊基-N′-(对氨基苯磺酸钠)硫脲与铜(Ⅱ)的显色反应及应用  

STUDY OF THE COLOUR REACTION BETWEEN CUPRIC ION AND N-AMYL-N′-(p-AMINOBENZENE SULFONATE)-THIOUREA AND ITS ANALYTICAL APPLICATION

作　　者：李英[1] 荆瑞俊[1] 马东兰[2] 王玉炉[2] 

机构地区：[1]河南科技学院化学与化工系,新乡453003 [2]河南师范大学化学与环境科学学院,新乡453002

出　　处：《理化检验（化学分册）》2005年第12期907-909,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：河南科技学院科研重点基金资助项目

摘　　要：研究了试剂N-戊基-N'-(对氨基苯磺酸钠)硫脲(ABSTU)与铜(Ⅱ)的显色反应.结果表明,在pH 5.0～5.6的HOAc-NaOAc缓冲体系中,铜(Ⅱ)与ABSTU形成1:3的蓝绿色水溶性络合物,其最大吸收峰位于341.2 nm,表观摩尔吸光系数ε341.2nm=9.40×104L·mol-1·cm1,铜含量在2～12 μg/25 mL范围内服从比耳定律.应用于铝合金及锌矿分析,所得结果与已知值相符,回收率依次为93.5%及98.5%.In an acetate buffer medium between pH 5. 0- 5. 6 cupric ion reacts with N-amyl-N＇-（p- aminobenzene sulfonate）-thiourea （ABSTU） when heated at 80 ℃ in a water bath for more than 5 min, to form a bluish green complex （Cu ： R= 1 ： 3） having its absorption maxima at 341.2 nm and an apparent molar absorptivity of 9. 4×10%4L · mol^-1· cm^-1. Beer＇s law holds in the range of 2 to 12 big of Cu（ Ⅱ ） per 25 mL of solution. The proposed method has been applied to the determination of copper in aluminum alloy and zinc ore samples giving results in consistency with the known values. Results obtained in the recovery test were 93.5% for aluminum alloy sample and 98. 5% for zinc ore sample.

关 键 词：分光光度法 N-戊基-N'-(对氨基苯磺酸钠)硫脲 铜(Ⅱ) 锌矿 铝合金 

分 类 号：O657.32[理学—分析化学]