N-十一烷基-N′-(对氨基苯磺酸钠)硫脲光度法测定铜  

ABSORPITOPHOTOMETRIC STUDY ON THE REACTION BETWEEN COPPER AND THE NEW REAGENT-N-UNDECYL-N′-(SODIUM p-AMINOBENZENESULFONATE) THIOUREA

作　　者：马东兰[1] 夏东升[1] 崔凤灵[1] 李建平[1] 王玉炉[1] 

机构地区：[1]河南师范大学化学系,新乡453002

出　　处：《理化检验（化学分册）》2000年第2期68-69,共2页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：河南省自然科学基金资助项目

摘　　要：研究了新显色剂长链饱和脂肪烃取代基化合物 (UPT)和微量 Cu2 +反应。试验表明 ,在p H5.2～ 5.6的乙酸 -乙酸钠介质中 ,Cu2 +与试剂形成摩尔比为 1∶ 3的淡黄绿色稳定络合物 ,其最大吸收为 30 0 .4nm,表观摩尔吸光系数为 ε30 0 .4 nm=2 .39× 1 0 5L·mol-1·cm-1。铜浓度在 2～ 1 2 μg/2 5ml的范围内符合比耳定律 ,相关系数 r=0 .9990。方法简便、灵敏 ,应用于样品测定 。The reaction of copper with a new reagent N Undecyl N′ (sodium p aminobenzenesulfonate) thiourea was studied by Absorpitophotometry. In a range of pH 5.2~5.6, copper forms a stable complex with UPT showing the maximum absorption at 300.4nm with an apparent molar absorptivity of 2.39×10 5L·mol -1 ·cm -1 . Beer′s law is obeyed in the range of 2~12μg/25ml for copper. This method has been used for the determination of microamounts of copper in aluminium alloy, wheatskin, porkliver with satisfactory results.

关 键 词：卟啉类试剂 吸光光度法 铜 显色剂 UPT 

分 类 号：O614.121[理学—无机化学] O657.32[理学—化学]