Liang Pei, Zhao Ehong, Li Feng
Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, PR China.
Talanta. 2009 Mar 15;77(5):1854-7. doi: 10.1016/j.talanta.2008.10.033. Epub 2008 Oct 31.
A new method for the determination of palladium was developed by dispersive liquid-liquid microextraction preconcentration and graphite furnace atomic absorption spectrometry detection. In the proposed approach, diethyldithiocarbamate (DDTC) was used as a chelating agent, and carbon tetrachloride and ethanol were selected as extraction and dispersive solvent. Some factors influencing the extraction efficiency of palladium and its subsequent determination, including extraction and dispersive solvent type and volume, pH of sample solution, concentration of the chelating agent and extraction time, were studied and optimized. Under the optimum conditions, the enrichment factor of this method for palladium reached at 156. The detection limit for palladium was 2.4ngL(-1) (3sigma), and the relative standard deviation (R.S.D.) was 4.3% (n=7, c=1.0ngmL(-1)). The method was successfully applied to the determination of trace amount of palladium in water samples.
通过分散液液微萃取预富集和石墨炉原子吸收光谱检测，开发了一种测定钯的新方法。在所提出的方法中，二乙基二硫代氨基甲酸盐（DDTC）用作螯合剂，四氯化碳和乙醇分别被选为萃取溶剂和分散剂。研究并优化了一些影响钯萃取效率及其后续测定的因素，包括萃取溶剂和分散剂的类型及体积、样品溶液的pH值、螯合剂浓度和萃取时间。在最佳条件下，该方法对钯的富集因子达到156。钯的检测限为2.4ngL(-1)（3σ），相对标准偏差（R.S.D.）为4.3%（n = 7，c = 1.0ngmL(-1)）。该方法成功应用于水样中痕量钯的测定。
