The amino-acid imidazoline amphoteric surfactant was prepared from dichloroethane and vegetable-oil fatty acid as raw materials by aminolysis, esterffication and hydroxymethylation.

以二氯乙烷与植物油脂肪酸等为原,氨解、酯化、羟甲化缩合反应制得氨酸类咪唑啉型两性表面活性剂。

The proposed method was applied to extracting pure spectra and determining background of a two component system which consists of dichloroethane and propanone, satisfactory results were obtained.

本方法二氯乙烷及丙酮中各组分红外光谱的提取，获得了满意的结果。