gradient elution analysis

例句：

1. 1. The gradient elution method isused to separate different components in a sample.
   梯度洗脱法用于分离样品中的不同成分。
2. 2. In gradient elution analysis, thesolvent is gradually changed to separate the targetcompound from other impurities.
   在梯度洗脱分析中，溶剂逐渐改变以将目标化合物与其他杂质分开。
3. 3. The gradientelution analysis was used to identify thepresence of a specific drug in the patient's blood.
   梯度洗脱分析被用来识别患者血液中特定药物的存在。