Abstract:

A new method has been established for the analysis of acetic acid，acrylic acid，hexahyl carbonic acid， benzoic acid and p-toluenesulfonic acid in petrochemical wastewater by ion chromatography. The IonPac AS11-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 acid，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.

Key words: organic acid, petrochemical wastewater, ion chromatography

摘要：

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%．

关键词: 有机酸, 石化废水, 离子色谱

CLC Number: 

• X832