gas phase chromatography

例句：

1. 1. Gas chromatography is a powerful tool for analyzing complex mixtures.
   气相色谱法是分析复杂混合物的有力工具。
2. 2. In gas chromatography, the sample is heated and separated into its components.
   在气相色谱法中，样品被加热并分离成其组成部分。
3. 3.The gas chromatography method was used to identify the chemical composition of the unknown substance.
   使用气相色谱法来识别未知物质的化学成分。