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〔目的〕多组分混合物中铝的测定。〔方法〕在 KH2 PO4- K2 HPO4缓冲溶液 ,聚乙二醇 -铬黑 T-硫酸铵体系中 ,水溶性高聚物对 Al3+、 Ca2 +、 Co2 +、 Cu2 +、 Mg2 +、Pb2 +、 Zn2 +萃取研究。〔结果〕在 p H=8时 ,Co2 +、Cu2 +、Mg2 + 、 Zn2 + 被聚乙二醇相完全萃取 ,Ca2 + 、 Pb2 + 被 HPO2 - 4 掩蔽 ,而 Al3+ 几乎不被萃取 ,从而实现了对上述混合离子溶液中 Al3+ 的定量分析。〔结论〕该方法在 Al3+ 含量 0～ 1.6 μg· ml- 1 范围内有良好的线性关系。
[Purpose] The determination of aluminum in multi-component mixtures. [Method] The solubility of Al3 +, Ca2 +, Co2 +, Cu2 +, Mg2 +, Pb2 + and Zn2 in aqueous solution of KH2PO4-K2HPO4 buffer and polyethylene glycol-chrome black T-ammonium sulfate + Extraction studies. [Results] Co2 +, Cu2 +, Mg2 + and Zn2 + were completely extracted by polyethylene glycol phase at p H = 8, Ca2 + and Pb2 + were masked by HPO2 - 4 and Al3 + was hardly extracted The quantitative analysis of Al3 + in the mixed ion solution was carried out. [Conclusion] The method has a good linear relationship in the range of 0 ~ 1.6 μg · ml-1 Al3 +.