浊点萃取——火焰原子吸收光谱法测定水样中的痕量铜  

Determination of trace amount of copper in water samples by cloud point extraction:flame atomic absorption spectrometry

作　　者：臧晓欢[1] 吴秋华[1] 马晶军[1] 李英丽[1] 李敬慈[1] 何红岩[1] 董文静[1] 

机构地区：[1]河北农业大学理学院河北省生物无机化学重点实验室,保定071001

出　　处：《河北农业大学学报》2008年第4期123-126,共4页Journal of Hebei Agricultural University

基　　金：河北省教育厅科研发展基金(2007121);河北农业大学非生命学科和新兴学科科研发展基金资助项目

摘　　要：以1-(2-吡咯偶氮)-2-萘酚(PAN)为配位剂,Triton X-114为中性表面活性剂,HNO_3-乙醇为黏度调节剂,pH为7的中性铜标液,对浊点萃取-火焰原子吸收光谱法测定铜的试验条件进行了优化。在最佳条件下,铜的检测限为0.33μg/L,富集倍数为50,方法的线性回归方程为:A=0.0449 c+0.007 1。对自来水,矿泉水,井水以及学校湖水中痕量铜的含量进行了测定,加标回收率为97%～104%。Using 1 - （2 - pyridylazo） - 2 - naphthol （PAN） as chelating agent, Triton X - 114 as surfactant with HNO3 - ethnol as regulator of viscosity, pH = 7, the determination conditions of copper by cloud point extraction-- flame atomic absorption spectrometry （CPE- FAAS） method-- were optimized. Under the optimal conditions, the detection limit of copper was 0.33 ug/L. The enrichment factor was 50 - fold for copper. The regression equation was A = 0. 0449 c ＋ 0. 0071. The proposed method was successfully applied to the determination of trace quantities of copper in four water samples, including tap water, mineral water, wall water and river water, with the satisfactory recoveries ranging from 97 % to 104 %.

关 键 词：浊点萃取 表面活性剂 火焰原子吸收光谱法 铜 

分 类 号：O657.3[理学—分析化学]