非螯合物浊点萃取-石墨炉原子吸收法测定水中痕量铊Ⅲ  

Cloud Point Extraction-Graphite Furnace Atomic Absorption Spectrometry for the Determination of ThalliumⅢ

作　　者：肖宇[1] 郑波[1] 张克荣[1] 

机构地区：[1]四川大学华西公共卫生学院卫生检验学教研室,成都610041

出　　处：《分析化学》2007年第11期1654-1656,共3页Chinese Journal of Analytical Chemistry

摘　　要：建立不需形成螯合物的浊点萃取-石墨炉原子吸收法测定水中铊a田D的新方法。用浊点萃取技术富集水中铊a田D，石墨炉原子吸收法测定。经考察，浊点萃取环境水体中铊a田D的最优条件为pH12，90℃水浴2h，Triton X-114浓度2．0g／L；在优化后实验条件下，方法测定铊a田D的检出限为0．018彬L；相对标准偏差为8．89％-13．7％（C=0．1μg／L及1．0μg／L，n：7）；加标回收率为98．0％-101％。本法适于水中痕量铊（Ⅲ）的测定。A cloud point extraction method was developed for the separation and preconcentration of thallium, after adding Triton X Then the thallium（Ⅲ） -114 to the solution, the thallium（Ⅲ） can be extracted directly by the cloud point method. was determined by graphite furnace atomic absorption spectrometry. The optimal conditions included pH 12.0, heating 2 h at 90℃ with the concentration of Triton X-114 2.0 g/L. Under the optimal conditions, the detection limit of thallium in water was 0.018 μg/L. And the relative standard deviations were 8.9% and 13.7 % （ C =0. 1 μg/L and 1.0 μg/L, n =7）. The recovery for the standard addition in surface waters was 98.0% - 101%. The proposed method was simple, rapid and applied to surface water determination with satisfactory results.

关 键 词：浊点萃取 石墨炉原子吸收法 铊 

分 类 号：O657.31[理学—分析化学]