浊点萃取-火焰原子吸收光谱法测定催化剂中痕量钯的研究  

Determination of trace palladium by flame atomic absorption spectrometry with cloud point extraction

作　　者：杨柳[1] 周方钦[1] 黄荣辉[1] 刘正华[1] 罗友云[1] 

机构地区：[1]湘潭大学化学学院,湘潭411105

出　　处：《分析试验室》2006年第12期65-67,共3页Chinese Journal of Analysis Laboratory

摘　　要：研究了以1-（2-吡啶偶氮）-2-萘酚（PAN）为络合剂，以非离子型表面活性刺Triton X-100为萃取剂的浊点萃取分离富集-火焰原子吸收光谱法测定痕量钯的新方法。详细考察了溶液的pH、络合剂和表面活性剂浓度、平衡温度和时间等条件对浊点萃取效果的影响。该方法对钯的检出限为30．8ng／mL，相对标准偏差（RSD）为2．1％（n=10），回收率在97．8％-106．6％之间。可用于催化剂中Pd（Ⅱ）的测定。A new method for the determination of trace palladium by flame atomic absorption spectrometry with cloud point extraction was proposed. The effects of experimental conditions such as pH, concentrations of chelating agent and surfactant, equilibration temperature and time on cloud point extraction were discussed. Uunder the optimum conditions, the detection limit was 30.8 ng/mL, and the relative standard deviation was 2.12% （ n = 10）. The recoveries of Pd2. ranged from 97.8% - 106.6%. The proposed method has been applied to the determination of palladium in catalysts with satisfactory results.

关 键 词：浊点萃取 火焰原子吸收光谱法 TRITON X-100 钯 

分 类 号：O657.31[理学—分析化学]