Liquid-Liquid Extraction (LLE) is a kind of tradition sample pretreatment method. There are 70 percent of documents which adopt Liquid-Liquid Extraction as a way of sample pretreatment.

液-液萃取(LLE)是一种传统的样品前处理技术，报道目前有70%的有关文献采用液-液萃取作为样品前处理方式。

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Learn how to "work up" your reaction using a separatory funnel to perform a liquid-liquid extraction.

用分液漏斗示范液-液萃取并学习如何用“完整的反应操作步骤”检查你的反应能否发生。

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Conventional organic sample preparation methods, such as liquid-liquid extraction and solid phase extraction, are time and solvent consuming, and often involve several complicated procedures.

传统的有机物样品分析前处理方法主要有液-液萃取、固相萃取等方法，这些方法具有耗时长、操作繁琐、且需要大量有机溶剂等缺点。

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