chromatographic grade

例句：

1. 1. The chromatographic grade of the sample is very high.
   样品的色谱纯度非常高。
2. 2. The chromatographic grade of the product is determined by the manufacturer.
   产品的色谱纯度由制造商决定。
3. 3.The chromatographic grade of the oil is determined by its chemical composition.
   油的色谱纯度由其化学成分决定。