high performance liquid chromatography

例句：

1. 1. The method is used to analyze the chemical composition of samples.
   这种方法用于分析样品的化学成分。
2. 2. High-performance liquid chromatography is a powerful tool for separating and identifying complex mixtures.
   高效液相色谱是一种强大的工具，用于分离和鉴定复杂的混合物。
3. 3. In high-performance liquid chromatography, the sample is injected into a column filled with a stationary phase, which separates the analytes based on their polarity.
   在高效液相色谱中，样品被注入到填充有固定相的柱中，根据其极性将分析物分离。