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.

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。

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