浊点萃取-石墨炉原子吸收光谱法测定水样中痕量铝  

Determination of trace amount of aluminium in water samples by graphite furnace atomic absorption spectrometry with cloud point extraction

作　　者：方克鸣[1] 陈建荣[1] 吴兰菊[1] 

机构地区：[1]浙江师范大学化学与生命科学学院,金华321004

出　　处：《分析试验室》2008年第4期63-65,共3页Chinese Journal of Analysis Laboratory

基　　金：浙江师范大学青年基金(20032052)项目资助

摘　　要：提出了浊点萃取石墨炉原子吸收光谱法测定痕量铝的新方法。探讨了溶液pH、试剂浓度等实验条件对浊点萃取及测定灵敏度的影响。在最佳条件下,富集40 mL样品溶液,用石墨炉原子吸收光谱法测定,铝的检出限为0.045μg/L,铝的富集倍率为78.5倍。方法适用于自来水、河水及海水中痕量铝的测定。A new method for the determination of trace amount of aluminium in water by graphite furnace atomic absorption spectrometry with cloud point extraction was proposed. The effect of experimental conditions such as pH and concentration of reagents on cloud point extraction and determination sensitivity was discussed and optimized. Under the optimum conditions, pre-concentration of only 40 mL of sample in the presence of 0. 125 % Triton X-114 permitted the detection of 0.045 μg/L （3σ） for aluminium with the enhancement factor of 78.5. The method has been applied to the determination of aluminium in water samples with satisfactory recoveries.

关 键 词：铝 8-羟基喹啉 浊点萃取 石墨炉 原子吸收光谱法 

分 类 号：O657.31[理学—分析化学]