单词：gradient elution
gradient elution的用法和样例：
例句
- METHODS Gradient elution HPLC was used to analyze the alcohol extracts of Radix Salviae Miltiorrhizae.方法采用梯度洗脱高效液相色谱法分析丹参乙醇提取物。
- In this way, the different grades of acetonitrile and methanol were tested to show the feasibility with which they are applied in gradient elution.按照此法，对国产不同等级的乙腈和甲醇进行了测试，指明这些试剂用于梯度洗脱的可能性。
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