气相色谱法测定废水中酚的方法探究

Study on GC Determination of Volatile Phenols in Industrial Waste Water

工业废水中酚在pH为4～5时，用溴衍生化，以抗坏血酸为还原剂除去多余溴单质，再用混合萃取剂萃取分离，用气相色谱仪对萃取液进行分析。用这种方法测定苯酚、邻甲酚、间甲酚、对甲酚4种挥发酚及二元酚、三元酚，测得其回收率在86．09／6～98．1％之间，相对标准偏差在4．5％～7．3％之间。

Phenols were determined by gas chromatograph（GC） in industrial waste water at the range of pH 4—5 with bromine,which used ascorbic acid as the reducing agent in derivation,and mixed solvent extraction.The phenols included phenol,o-cresol,m-cresol,the four phenol cresol,dihydric phenol and trihydric phenol.The recovery rate was in the range of 86.0%—98.1%,and the values of RSD were in the range of 4.5%—7.3%.