浊点萃取-石墨炉原子吸收法测定水中痕量铬和银  

Cloud point extraction and determination of chromium and silver in surface water

作　　者：肖宇[1] 张克荣[1] 郑波[1] 

机构地区：[1]四川大学华西公共卫生学院,成都610041

出　　处：《中国卫生检验杂志》2006年第6期667-668,738,共3页Chinese Journal of Health Laboratory Technology

摘　　要：目的：建立用浊点萃取-石墨炉原子吸收法测定水中Cr和Ag的方法。方法：利用非离子表面活性剂浊点萃取富集石墨炉原子吸收法测定。结果：方法最低检测质量浓度分别为Cr：0．04μg／L，Ag：0．04μg／L；相对标准偏差分别为Cr：4．6％，Ag：3．3％；加标回收率分别为Cr：72．0％-109．0％，Ag：75．0％-110．6％；线性范围为1～15.0μg／L（r〉0．99）。结论：本法灵敏度高，干扰小，操作简便，准确可靠，重复性好。Objective： To develop a method for extraction and determination of chromium and silver in surface water. Methods：The analytes were concentrated by cloud point extraction and determined by the graphite furnace atomic absorption spectrometry. Results： Under optimal conditions, the detection limit of Cr and Ag was 0.04 μg/L and 0.04 μg/L, respectively. And the relative standard deviations were 4.6% to chromium and 3. 3% to Ag for 10 parallel determinations. Samples of tap water and river water were spiked with recovery ranged from 72.0% - 109.0% and 75.0%- 110. 6% for Ag and Cr, respectively. Conclusion：The proposed method is sensitive, rapid and can be accurate and applied to surface water determination with satisfactory results.

关 键 词：浊点萃取 石墨炉原子吸收法 铬 银 

分 类 号：O657.31[理学—分析化学]