4－AAP两波段光度洁同时测定水中酚类和芳胺

Spectrophotometric Method for the Simultaneous Determination of Phenols and Aromatic Ammes in Sewage with 4-AAP

在ＰＨ为５．５的ＨＣｌ－（ＣＨ２）５Ｎ．介质中，铁氰化钾和过二硫酸铵存在下，用４－氨基安替吡啉（４－ＡＡＰ）两波段光度法可同时测定污水中０．１—３０ｍｇ／Ｌ的酚类和０．００８—３．０ｍｇ／Ｌ的芳胺．水样不需要预镏和萃取操作，石油类及０．３ｍｇ／ｔ以下的硫化物不于扰测定，Ｃｕ２＋、Ｆｅ３十的干扰可用ＥＤＴＡ掩蔽消除．酚类和芳胺的水样加标回收率酚类为９８％－１０５％，芳胺为９５％－１０５研究了１０种酚和１３种芳胺的测定灵敏度．

modified spectrophotometric method of determination for phenols and aromatic amines of sewage was discribed.It was found that the Peak ranges of phenols were 300540um and that of aromatic ammes were 530-480 um using 4-aminoantipyrine(4-AAP)with potassium hexacyanoferrate and ammonium Peroxydisulfate in the medium of PH 5. 5 HCl-(CH2)6 N4.Phenols of 0.1-30 mg/Land aromtic adenes of 0. 008-3. 0 mg/L were determined simuisneously by spectrophotometry without Ppedisfillation and extraction. Lower than that 0. 3 mg/L of sulphide and cO-Oil in sewage have no interference with determination Of phenols and aromatic ammes. The interference of Cu2+ and Fe3+ could be removed by EDTA masking.The recovery for phenols and aromatic adenes were 98%-105 % and 95 %-105 %, respectively.Thesensitivies samples of 10 phenols and 13 aromatic adenes were studied.