A new method has been established for the analysis of acetic acid, aerylie acid,hexahyl carbonic acid, benzoic acid and p-tohienesulfonic acid in petrochemical wastewater by ion chromatography. The IonPac ASH-HC anion chromatographic column is used, and the eluent is 30 mmol/L of NaOH aqueous solution. The eluent flow rate is 1 mL/min and suppression current 75 mA. Other organisms and common inorganic anions in samples have little interference on determination of acetic acid,acrylic aeid,hexahyl carbonic acid,benzoic acid and p-toluenesulfonic acid. The detections of peak area lower limit of these organic acids are 0.024,0.025 ,0.094,0.075,0.059 mg/L,respectively. The lower limit of peak heights examined are 0.029,0.007,0.045,0.025,0.070 mg/L,respectively. The relative standard deviations of the peak areas are 1.2%,1.1%,5.3%,2.7% and 3.3%, respectively, and relative standard deviations of peak heights are 1.7%,0.4%,2.8%, 1.6% and 4.5%, respectively.%建立了用离子色谱测定石化废水中常见有机酸:乙酸、丙烯酸、环己甲酸、苯甲酸和对甲基苯磺酸的新方法.采用IonPac AS11-HC阴离子色谱柱,淋洗液为30 mmol/L的NaOH水溶液,淋洗液流速1 mL/min,抑制电流75 mA.样品中其他有机物和常规无机阴离子对乙酸、丙烯酸、环己甲酸、苯甲酸和对甲基苯磺酸的测定干扰小.5种有机酸的峰面积检测下限分别为0.024、0.025、0.094、0.075、0.059 mg/L,峰高检测下限分别为0.029、0.007、0.045、0.025、0.070 mg/L;峰面积的相对标准偏差分别为1.2％、1.1％、5.3％、2.7％、3.3％,峰高相对标准偏差分别为1.7％、0.4％、2.8％、1.6％、4.5％.
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