Support, delivery and compositive distillation technique was first used to complete the extraction, separation and concentration of trace components.

探索一种新型的样品前处理装置，首次运用载体、携带体和综合蒸馏技术完成了待测样品中微量成分的提取分离和富集。

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The solid- phase extraction technique, including its principles, methodology , and the separation - modes for extracting drugs of abuse, is reviewed in this paper.

文章评述了固相萃取技术的原理、方法、特点以及从生物样品中提取滥用药物时常用的分离模式、吸附荆和洗脱剂。

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This paper briefly introduces the recent research and application status of emulsion liquid membrane technique in the separation and extraction of amino acids.

综述了乳状液膜技术的基本原理及其在分离提取氨基酸方面的研究进展状况。

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