本文件规定了一种快速提取油脂和制备脂肪酸甲酯的方法。所得甲酯可用于气相色谱分析。本文件适用于以下油料:芥酸含量低（<2%）的油菜、芥菜、向日葵、大豆、亚麻籽。值得注意的是，将这种快速方法应用于芥酸含量较高的油菜中，芥酸含量过高估计约为1%。在参考文献[6]中观察到这种差异，可能是由于从样品中部分提取了油（产率约为70%）。甘油三酯中高含量的芥酸可增加其在正己烷中的溶解度，这是由于碳长链（C22）的亲脂作用。然而，由于在大量高芥酸菜籽样品上没有检验这一影响，因此在分析高芥酸菜籽时不宜对芥酸含量应用校正因子。

This document specifies a rapid method for extraction of oil and for preparation of the methyl esters of fatty acids. The methyl esters thus obtained can be used for gas chromatography. This document is applicable to the following oilseeds: rape and mustard with low erucic acid content (< 2 %), sunflower, soya beans, linseed. NOTE Applying this rapid method to high erucic acid content rapeseed leads to an overestimation of erucic acid content by approximately a mass fraction of 1 %. This difference was observed in Reference [6] and could be due to the partial extraction of the oil from the sample (yield around 70 %). High content of erucic acid in triglycerides could increase their solubility in hexane because of the lipophilic effect of the carbon long-chain (C22). However, as this effect was not checked on a large set of high erucic rapeseed samples, it is not appropriate to apply a correction factor to the erucic acid content when analysing high erucic acid rapeseed.