differential chromatography

例句：

1. 1.Differential chromatography is a technique used to analyze the differences between two or more samples.
   差分色谱是一种用于分析两种或多种样品之间差异的技术。
2. 2.The differential chromatography method was used to identify the different components in the sample.
   差分色谱法被用来识别样品中的不同成分。
3. 3.The differential chromatography results showed that the samples had distinct differences in their chemical compositions.
   差分色谱结果显示，样品在化学组成上存在明显差异。