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1引言环境水样中痕量阳离子表面活性剂的测定已报道的有分光光度法、荧光法等。本文发现，在pH为9．5的氨水-氯化按溶液中，阳离子表面活性剂与曙红Y生成离子缔合物，此统合物可用苯萃取，其在苯相中的荧光强度与阳离子表面活性剂浓度在一定范围内呈线性关系。据此建立了测定痕
1 Introduction Determination of trace levels of cationic surfactants in aqueous samples have been reported spectrophotometry, fluorescence and so on. This paper found that in the pH 9.5 aqueous ammonia - chloride solution, the cationic surfactant and eosin Y ion association complex, the compound can be extracted with benzene, the fluorescence intensity in the benzene phase and the cationic surface Active agent concentration in a certain range of linear relationship. Based on this established test marks