OBJECTIVE:To establish a method for simultaneous determination of lysophosphatidyl choline(LPC)and lysophos-phatidyl ethanolamine(LPE)in Nimodipine fat emulsion. METHODS:HPLC was performed on the column of Lichrosher Diol with detector of evaporative light scattering detector with mobile phase A of heptane- isopropyl alcohol solution(43∶57,V/V),mobile phase B n-heptane-isopropyl alcohol-water(29.5∶59∶11.5,V/V/V)(gradient elution)at a flow rate of 1.5 ml/min,column tempera-ture was 40℃,and the injection volume was 20 µl. RESULTS:The linear range was 0.020 0-0.400 0 mg/ml for LPC(r=0.999 0)and 0.010 0-0.200 0 mg/ml for LPE(r=0.999 6),and the logarithm value of concentration and peak area showed good linear relationship;the limit of quantitation was 0.013 4 mg/ml for LPC and 0.013 0 mg/ml for LPE;the limit of detection was 0.007 8 mg/ml for LPC and 0.007 6 mg/ml for LPE;RSDs of precision,stability and reproducibility tests were lower than 2%;recoveries were 95.96%-100.63%(RSD=1.83%,n=9)and 99.22%-101.76%(RSD=0.80%,n=9). CONCLUSIONS:The method is simple,and can be used for the determination of related substance in Nimodipine fat emulsion.%目的：建立同时测定尼莫地平脂肪乳中溶血磷脂酰胆碱（LPC）和溶血磷脂酰乙醇胺（LPE）含量的方法。方法：采用高效液相色谱法。色谱柱为Lichrosher Diol，检测器为蒸发光散射检测器，流动相A为正庚烷-异丙醇溶液（43∶57，V/V），流动相B为正庚烷-异丙醇-水（29.5∶59∶11.5，V/V/V）（梯度洗脱），流速为1.5 ml/min，柱温为40℃，进样量为20µl。结果：LPC和LPE的检测质量浓度线性范围为0.0200～0.4000 mg/ml（r＝0.9990）、0.0100～0.2000 mg/ml（r＝0.9996），LPC和LPE质量浓度的对数值与其峰面积的对数值线性关系良好；定量限分别为0.0134、0.0130 mg/ml，检测限分别为0.0078、0.0076 mg/ml；精密度、稳定性、重复性试验的RSD＜2％；回收率分别为95.96％～100.63％（RSD＝1.83％，n＝9）、99.22％～101.76％（RSD＝0.80％，n＝9）。结论：该方法操作简便，可用于尼莫地平脂肪乳中有关物质的测定。
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