反萃取双波长光度法测定水中微量酚类和芳胺

Spectrophotometric Method for the Simultaneous Determination of Phenols and Aromatic Amines in Sewage with Extraction Reextraction.

研究了乙醚萃取，１０％ＮａＯＨ溶液和１０％ＨＣｌ溶液反萃取，４－氨基安替吡啉（４－ＡＡＰ）双波长光度法同时测定污水中酚类和芳胺含量的分析方法，提高了测定灵敏度，有效地消除多种干扰物质的干扰，可测定０．００３－６．０ｍｇＬ－１的酚类和０．０００８－０．５ｍｇＬ－１的芳胺．加标回收率，苯酚１０１％－１０８％，苯胺９６％－１０７％．酚类测定与国标的相对误差≤６．５％．芳胺类测定结果与相应国标法的相对误差在±５％左右．

This paper deals with a method of simultaneous determination of phenols and aromatic amines which extracted by ether,then reextracted by 10% NaOH and 10% HCl respectively.The sensitivity is improved highly,and many kinds of interferences is removed efficiently.Phenols of 0.03-6.0 mg/L and aromatic amines of 0 008-0 5mg/L can be determined.