中草药中微量钼的离子液体增敏水杨基荧光酮测定  

Determination of Micro Molybdenum in Chinese Traditional Herbal Drugs by Ionic Liquid Sensitized Sepctrophotometic Method

作　　者：沙鸥[1,2] 李亚鑫[1] 曾艳霞[1] 马卫兴[1] 

机构地区：[1]江苏连云港淮海工学院化学工程学院,江苏连云港222005 [2]扬州大学化学化工学院,江苏扬州225002

出　　处：《时珍国医国药》2012年第11期2674-2676,共3页Lishizhen Medicine and Materia Medica Research

基　　金：国家自然科学基金(No.21101069);江苏省海洋资源开发研究院科技开放基金(No.JSIMR11B26);淮海工学院自然科学类校内课题(No.Z2011020)

摘　　要：建立了溴化十六烷基咪唑盐(C16minBr)作为新型光度增敏剂测定中草药中钼(Ⅵ)的含量。在0.5 mol·L-1盐酸溶液中,离子液体C16minBr对Mo(VI)-水杨基荧光酮体系具有增敏作用,钼浓度在0.01～0.50μg·ml-1范围内符合朗伯比尔定律,线性回归方程为A=0.124 2C(μg·ml-1)+0.019 78,线性相关系数为0.999 1,表观摩尔吸光系数ε525=1.242×105L·mol-1·cm-1。将该法用于中草药中微量钼的测定,回收率在97%～109%范围内。A new ionic liquid sensitized sepctrophotometic method was proposed on the base of the Mo（VI） - Salicyl fluorone （SAF） - 1 - hexadecyl - 3 - methylimidazolium bromide （ C16 minBr） system. In the presence of 0.5 mol· L^- 1 hydrochloric acid solution, the color reaction of Mo （VI） with Salicyl fluorone （SAF） could be sensitized by adding the ionic liquid of C16 minBr. In the range of 0.01 -0.50 μg · ml-1 of Mo the linear regression equation was A =0. 1242C（ μg · ml^-1 ） ＋0. 01978 with correla- tion coefficient of 0. 9991. The apparent molar absorption coefficient of the complex was 1. 242 × 10^5 L·mol^ -1 . cm^-1. This developed method was used for the determination of Chinese traditional herbal drugs and the result consistent with those from graphite furnace atomic absorption spectrophotometry. The recovery rates in the sample were in the range of 97% - 109%.

关 键 词：离子液体 中草药 钼 增敏 

分 类 号：O657.32[理学—分析化学]