Cloud Point Extraction of Copper, Zinc, Iron and Nickel in Biological and Environmental Samples by Flame Atomic Absorption Spectrometry
Cloud Point Extraction of Copper, Zinc, Iron and Nickel in Biological and Environmental Samples by Flame Atomic Absorption Spectrometry
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DOI：
10.1080/01496390802437164
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发表时间：
2009-02
影响因子：
2.8
通讯作者：
M. Ghaedi;A. Shokrollahi;K. Niknam;M. Soylak
中科院分区：
文献类型：
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作者：
M. Ghaedi;A. Shokrollahi;K. Niknam;M. Soylak
摘要采用云点法对痕量铜、锌、铁和镍进行预富集，然后用火焰原子吸收光谱法测定。金属在表面活性剂Triton X-114介质中与2-苯基- 1h -苯并[d]咪唑（PHBI）反应。考察了pH、试剂用量等分析参数对分析物回收率的影响。未观察到基质离子的影响。Cu2+、Fe3+、Zn2+和Ni2+的检出限（3SDb/m）分别为1.8、2.8、1.4和2.1 ng mL−1。该方法可用于各种实际样品的金属含量测定。通过分析经认证的参考生物材料BCR 185 R肝脏样本，对该方法进行了验证。
Abstract Cloud point methodology was successfully employed for preconcentration of trace copper, zinc, iron, and nickel prior to their determination by flame atomic absorption spectrometry (FAAS). The metals react with 2-phenyl-1H-benzo[d] imidazole (PHBI) in a surfactant Triton X-114 medium. The effects of analytical parameters including pH, amounts of reagents etc. were investigated on the recoveries of analytes. No influences were observed from the matrix ions. The detection limits (3SDb/m) of 1.8, 2.8, 1.4, and 2.1 ng mL−1 for Cu2+, Fe3+, Zn2+, and Ni2+, respectively. The method was applied to metal determination in various real samples. The validation of the procedure was carried out by analysis of a certified reference biological material, BCR 185 R liver samples.