一测多评法同时测定苏子油胶丸中5种不饱和脂肪酸的含量
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篇名: 一测多评法同时测定苏子油胶丸中5种不饱和脂肪酸的含量
TITLE:
摘要: 目的:建立同时测定苏子油胶丸中5种不饱和脂肪酸含量的方法。方法:采用气相色谱法,以α-亚麻酸甲酯为内参物,分别计算α-亚麻酸甲酯与棕榈酸甲酯﹑硬脂酸甲酯﹑油酸甲酯﹑亚油酸甲酯的相对校正因子,由此测定并计算上述5种不饱和脂肪酸的含量。色谱柱为Agilent Innowax 毛细管柱,检测器为氢火焰离子化检测器(FID),进样口温度为230 ℃,检测器温度为250 ℃,气体流速为20 ml/min(氮气)、40 ml/min(氢气)、350 ml/min(空气),分流比为30 ∶ 1,柱温为190 ℃,进样量为1 μl。结果:α-亚麻酸甲酯、棕榈酸甲酯﹑硬脂酸甲酯﹑油酸甲酯﹑亚油酸甲酯检测进样量线性范围分别为0.018~0.792 μg(r=0.999 4)、0.001 6~0.017 6 μg(r=0.999 3)、0.005 6~0.246 4 μg(r=0.999 9)、0.003~0.132 μg(r=0.999 0)、0.018~0.792 μg(r=0.999 8);精密度、稳定性、重复性试验的RSD<5%;加样回收率分别为98.990%~101.070%(RSD=0.720%,n=6)、99.599%~100.699%(RSD=0.368%,n=6)、98.996%~101.680%(RSD=1.240%,n=6)、99.813%~100.963%(RSD=0.434%,n=6)、97.185%~99.602%(RSD=0.874%,n=6)。结论: 该方法操作简便、稳定、重复性好,可用于苏子油胶丸中棕榈酸甲酯﹑硬脂酸甲酯﹑油酸甲酯﹑亚油酸甲酯﹑α-亚麻酸甲酯含量的同时测定。
ABSTRACT: OBJECTIVE:To establish a method for the simultaneous determination of 5 unsaturated fatty acids in Perilla oil capsule. METHODS: With the reference material of α-linolenic acid methyl ester, GC was used to determine and calculate the relative correction factors of α-linolenic acid methyl ester with methyl palmitate, methyl stearate, methyl oleate and linoleic acid methyl ester, and the correction factors were used to calculate the contents of 5 unsaturated fatty acids; the column was Agilent Innowax capillary column,the detector was FID, the inlet temperature was 230 ℃, the detector temperature was 250 ℃, the gas flow rate was 20 ml/min (nitrogen), 40 ml/min (hydrogen) and 350 ml/min (air), split ratio was 30 to 1, the column temperature was 190 ℃, and injection volume was 1 μl. RESULTS:The linear range was  0.018-0.792 μg(r=0.999 4) for methyl palmitate, 0.001 6-0.017 6 μg(r=0.999 3) for methyl stearate,0.005 6-0.246 4 μg(r=0.999 9) for methyl oleate,0.003-0.132 μg(r=0.999 0) for linoleic acid methyl ester and 0.018-0.792 μg(r=0.999 8) for α-linolenic acid methyl ester; RSDs of precision, stability and reproducibility tests were lower than 5%; recoveries were 98.990%-101.70%(RSD=0.720%,n=6) for methyl palmitate, 99.599%-100.699%(RSD=0.368%,n=6) for methyl stearate, 98.996%-101.680%(RSD=1.240%,n=6) for methyl oleate, 99.813%-100.963%(RSD=0.434%,n=6) for linoleic acid methyl ester and 97.185%-99.602%(RSD=0.874%,n=6) for α-linolenic acid methyl ester. CONCLUSIONS:The method is simple and stable with good reproducibility, and can be used for the simultaneous determination of methyl palmitate, methyl stearate, methyl oleate, linoleic acid methyl ester, α-linolenic acid methyl ester in Perilla oil capsule.
期刊: 2016年第27卷第12期
作者: 伍静玲,仲海洁,胡军华,于桂芳,黄文哲,王振中,肖伟
AUTHORS: WU Jingling,ZHONG Haijie,HU Junhua,YU Guifang,HUANG Wenzhe,WANG Zhenzhong,XIAO Wei
关键字: 一测多评法;相对校正因子;苏子油胶丸;气相色谱法
KEYWORDS: Quantitative analysis of multi-components by single marker; Relative correction factor; Perilla oil capsule; GC
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