Abstract: A method for the determination of phosphatidylserine in milk powder by High performance liquid chromatography with evaporative light scattering detection（HPLC-ELSD）was developed. Samples were extracted with a mixture of chloroform and methanol. Chromatographic separation was performed on a Diol column by gradient elution using a binary mobile phase system consisting of hexane- isopropanol-acetic acid triethylamine and isopropanol-water-acetic acid-triethylamine. The recoveries of phosphatidylserine in milk powder at spiked levels between 50 and 150 mg/100 g were greater than 85%, and the limit of quantification was 30 mg/100 g. The proposed method has the advantages of accuracy,

Key words: HPLC; ELSD; phosphatidylserine

摘要： 建立了奶粉中磷脂酰丝氨酸的高效液相色谱-蒸发光散射检测的测定方法.采用氯仿甲醇混合溶剂做为提取剂,Diol色谱柱上分离,正己烷-异丙醇-乙酸-三乙胺和异丙醇-水-乙酸-三乙胺的二元系统进行梯度洗脱.每100 g奶粉中磷脂酰丝氨酸添加量为50～150 mg时,回收率大于85％.定量限30 mg/100 g.该方法具有结果准确,操作简便,重复性好等优点,可用于奶粉中磷酯酰丝氨酸的检测.

关键词: 高效液相色谱法；蒸发光散射检测器；磷脂酰丝氨酸