摘要:
OBJECTIVE:To establish a method for the contents determination of phospholipid and γ-linolenic acid in Com-pound linolenic acid soft capsule. METHODS:HPLC was conducted to determine the content of soybean lecithin;the column was Agilent TC-C18 with mobile phase of methanol-water(84:16,V/V)at a flow rate of 1.0 ml/min,the detection wavelength was 219 nm,the column temperature was 30 °C,and the injection volume was 10 μl.Gas chromatography was conducted to determine the content of γ-linolenic acid in the preparation;the column was DB WAX,injector temperature was 210 °C by temperature pro-grammed,carrier gas was helium at a flow rate of 1 ml/min by split injection(split ratio of 1:30),and the injection volume was 0.02μl. RESULTS:The linear range was 4.64-16.24μg/ml for phospholipid(r=0.999 6)and 0.093 44-0.327 04μg/ml forγ-linole-nic acid methy ester(r=0.999 6);RSDs of precision,stability and reproducibility tests were lower than 3%;recoveries were 97.44%-99.36%(RSD=0.93%,n=6) and 97.22%-99.07%(RSD=1.01%,n=6),respectively. CONCLUSIONS:The method is simple,stable with good separation,and can be use for the contents determination of phospholipid and γ-linolenic acid in Com-pound linolenic acid soft capsule.%目的:建立测定复方亚麻酸软胶囊中大豆卵磷脂和γ-亚麻酸含量的方法.方法:采用高效液相色谱法测定制剂中大豆卵磷脂的含量:色谱柱为Agilent TC-C18,流动相为甲醇-水(84:16,V/V),流速为1.0 ml/min,检测波长为219 nm,柱温为30°C,进样量为10μl;采用气相色谱法测定制剂中γ-亚麻酸的含量:色谱柱为DB WAX柱,进样口温度为210°C,程序升温,载气为氦气,流速为1 ml/min,分流比为1:30,进样量为0.02μl.结果:L-α-卵磷脂和γ-亚麻酸甲酯检测质量浓度线性范围分别为4.64~16.24μg/ml、0.093 44~0.327 04μg/ml(r=0.999 9、0.999 8);精密度、稳定性、重复性试验的RSD<3%;加样回收率分别为96.79%~99.36%(RSD=0.93%,n=6)、96.63%~99.07%(RSD=1.01%,n=6).结论:该两种方法操作简便、稳定、重复性好,可用于复方亚麻酸软胶囊中大豆卵磷脂和γ-亚麻酸含量的测定.