水中微量芘和荧蒽的胶束增敏荧光分析法同时测定  

Simultaneous Determination of Trace Pyrene and Fluoranthene in Water by Micellar-sensitized Fluorescence Spectrophotometry

作　　者：王晗[1] 迟燕华[1] 尚丽平[2] 庄稼[3] 马萍[1] 陈亮[1] 

机构地区：[1]西南科技大学材料科学与工程学院化学系,四川绵阳621010 [2]西南科技大学信息工程学院,四川绵阳621010 [3]西南石油大学材料科学与工程学院,四川成都610500

出　　处：《分析测试学报》2008年第11期1157-1161,共5页Journal of Instrumental Analysis

基　　金：国家863资助项目(2006AA10Z214);国家自然科学基金资助项目(20271042);国家电分析化学重点实验室基金资助项目(2005007);四川省青年基金资助项目(06ZQ026-026)

摘　　要：建立了吐温-20(Tween-20,Tw-20)直接荧光法同时测定水中溶解态芘(pyrene,Py)和荧蒽(fluoran-thene,FLuA)的方法。该法测定芘和荧蒽的线性范围分别为1.98×10-10～9.88×10-8mol/L和2.00×10-9～7.99×10-7mol/L,检出限分别为9.88×10-11mol/L和5.99×10-10mol/L。方法灵敏,用于自来水、江水样的分析,取得了良好的效果,芘的回收率分别为92%～102%和101%～102%,荧蒽的回收率分别为90%～100%和94%～111%。为预测和治理水污染提供了一种灵敏、快速且简便的测试手段。A direct spectrofluorimetry method was established for simultaneous determination of dissolved pyrene （Py） and fluoranthene（FLuA） in water based on the great enhancement of fluorescence intensities of Py and FLuA in tween-20 （Tw-20） medium. The effects of the types of surfactants, pH, and temperature on the systems were investigated. Under the optimized conditions, the calibration curves showed a good linear range from 1.98 ×10^-10mol to 9. 88 ×10^-8mol/L for Py and 2. 00 ×10^-9 to 7.99 ×10^-7mol/L for FLuA, and their detection limits were 9. 88 ×10^-11mol/L and 5.99 ×10^-10mol/L, respectively. The method was applied in the determination of Py and FLuA in real samples with satisfactory results. The recoveries of pyrene in tap water and river water were 92% - 102% and 101% - 10：2% , and the recoveries of fluoranthene in tap water and river water were 90% - 100% and 94% -111% , respectively. The method is simple, rapid and sensitive for the determination of trace Py and FLuA in the real water sample.

关 键 词：荧光检测 芘 荧蒽 吐温-20 

分 类 号：O657.32[理学—分析化学] O625.15[理学—化学]