采用碱性亚甲蓝萃取去除蛋白质、硫化物等干扰，然后经酸性亚甲蓝萃取法分析未经处理或仅简单处理生活污水中的阴离子表面活性剂浓度。

The interferences of protein and sulfide in the domestic wastewater are extracted with alkaline methyleneblue, and then the concentration of anionic surfactant is detected by using acid methyleneblue.

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通过研究萃取法脱除催化裂化轻汽油中能使醚化催化剂失活的碱性氮化物的工艺，考察了各种工艺条件对碱性氮脱除率的影响。

A process for the removal of basic nitrogen compounds from light gasoline by extraction is studied. The effects of extraction conditions on the removal of basic nitrogen compounds are investigated.

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