目的：测定地沟油中的微量元素含量。
Objective:To determine the contents of trace elements in hogwash oil.
方法采用气相色谱-质谱法测定植物油样品中的主要脂肪酸含量，应用国标方法进行油脂定性试验。
Methods The main fatty acid in vegetable oils was determined using GC - MS and qualitative test of oils was done using national standard method.
本文采用顶空进样气相色谱-质谱联用法测定蜡烛中香茅油的含量。
The citronella oil content of certain candle formulations was determined by headspace gas chromatography-mass spectrometry.
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