萃取光度法测定环境水样中痕量的钼  

The Extraction Spectrophotometric Determination of Trace Molybdenum in Environmental Water Samples

作　　者：卞惠芳[1] 

机构地区：[1]江阴职业技术学院化纺系,江苏江阴214431

出　　处：《四川化工》2014年第1期37-39,共3页Sichuan Chemical Industry

摘　　要：在硫酸介质和阳离子表面活性剂CTMAB存在下,钼与对氯苯基偶氮水杨基荧光酮(p-ClMBASF)形成稳定的配合物,在显色后的体系中加入离子液体1-异丁基-3-甲基咪唑六氟磷酸盐后,钼配合物(Mo-p-ClMBASF)迅速被萃取至离子液体相。在50℃时离子液体相可直接用于光度法测定钼,最大吸收波长为528nm。在500mL水样中,钼符合比尔定律,配合物的表观摩尔吸光系数达2.56×106L·mol-1·cm-1,能成功应用于天然水样中超痕量钼的测定。In the presence of sulfuric acid and CTMAB, p-CtMBASF reacted with molybdenum rapidly. Added 1-isobutyl -3-methyl-imidazolium hexafluorophosphate into the system, Mo- p-C1MBASF complex was rapidly extracted into the ionic liquid phase from the aqueous solution. The ionic liquid could be di- rectly used to determine molybdenum at 50℃ with the maximum absorption wavelength at 528nm. The ap- parent molar absorptivity was 2.56×10^6L·mo-1·cm-1. The determination of ultra trace molybdenum in natural water was carried out with the recommended method.

关 键 词：对氯苯基偶氮水杨基荧光酮 离子液体 萃取光度法 钼 

分 类 号：O657.3[理学—分析化学] X832[理学—化学]