本文用茜素Ｓ作萃取剂，研究了Ｆｅ（Ⅲ）、Ｃｏ（Ⅱ）、Ｎｉ（Ⅱ）、Ｃｕ（Ⅱ）、Ｚｎ（Ⅱ）、Ｃｄ（Ⅱ）、Ａｌ（Ⅲ）在聚乙二醇－硫酸铵－茜素Ｓ体系中的非有机溶剂萃取行为。实验结果表明，在ｐＨ５的ＨＡｃ－ＮａＡｃ缓冲溶液中，Ｆｅ（Ⅲ）、Ａｌ（Ⅲ）与茜素Ｓ的络合物可被ＰＥＧ相几乎完全萃取，Ｃｕ（Ⅱ）、Ｎｉ（Ⅱ）部分被萃取，而Ｃｏ（Ⅱ）、Ｚｎ（Ⅱ）、Ｃｄ（Ⅱ）则不被萃取，从而实现了Ｆｅ（Ⅲ）与Ｃｏ（Ⅱ）、Ｚｎ（Ⅱ）、Ｃｄ（Ⅱ）及Ａｌ（Ⅲ）与Ｃｏ（Ⅱ）、Ｚｎ（Ⅱ）、Ｃｄ（Ⅱ）混合离子间的定量分离。 In this paper, Alizarin S was used as extractant to study the effects of Fe (Ⅲ), Co (Ⅱ), Ni (Ⅱ), Cu (Ⅱ) Extraction Behavior of Non - Organic Solvents in Ammonium Sulfate - Alizarin S System. The experimental results show that the complexes of Fe (Ⅲ), Al (Ⅲ) and Alizarin S can be almost completely extracted by PEG phase in HAc-NaAc buffer solution at pH5. The Cu (Ⅱ) and Ni (Ⅱ) (Ⅱ), Zn (Ⅱ), Cd (Ⅱ), Al (Ⅲ) and Co (Ⅱ), Zn (Ⅱ) and Cd Quantitative Separation of Co (Ⅱ), Zn (Ⅱ) and Cd (Ⅱ) Mixed Ions.