摘要
建立离子色谱法同时测定生活饮用水中ClO4-和ClO2-、ClO3-、BrO3-、DCAA、TCAA 5种消毒副产物.样品经0.22 μm微孔滤膜过滤,进样体积为500 μL,以8～60 mmol/L氢氧化钾溶液梯度淋洗,流量为1.0 mL/min,用InoPac AS19色谱柱分离,电导检测器测定.ClO2-、ClO3-的质量浓度在0.05～2.0 mg/L范围内与色谱峰面积具有良好的线性关系,相关系数分别为0.999 9和0.999 4;ClO4-、BrO3-、DCAA、TCAA的质量浓度在0.005～0.2 mg/L范围内与色谱峰面积具有良好的线性关系,相关系数为0.999 7～0.999 9.6种阴离子的方法检出限为1.1～6.0 μg/L.低、中、高3个水平的加标平均回收率为94.0%～101%,6次测定结果的相对标准偏差为0.37%～2.01%.该方法检测效率高,可同时测定ClO4-和ClO2-、ClO3-、BrO3-、DCAA、TCAA 5种消毒副产物,适用于日常生活饮用水的检测.
Abstract
A method for simultaneous determination of ClO4-and ClO2-,ClO3-,BrO3-,DCAA,TCAA in drinking water by ion chromatography was established.The samples were filtered by 0.22 μm microporous filter,and the injection volume was 500 μL.The samples were eluted with 8-60 mmol/L potassium hydroxide solution at a flow rate of 1.0 mL/min,separated by InoPac AS19 column,and determined by conductivity detector.The mass concentration of ClO2-and ClO3-had a good linear relationship with the chromatographic peak area in the range of 0.05-2.0 mg/L,and the correlation coefficient was 0.999 9 and 0.999 4,respectively.The mass concentrations of ClO4-,BrO3-,DCAA and TCAA had a good linear relationship with the chromatographic peak area in the range of 0.005-0.2 mg/L,and the correlation coefficients were 0.999 7-0.999 9.The detection limits of six anion methods were 1.1-6.0 μg/L.The average recoveries of low,medium and high levels were 94.0%-101%,and the relative standard deviations of the six measurement results were 0.37%-2.01%.This method has high detection efficiency and can simultaneously determine ClO4-and ClO2-,ClO3-,BrO3-,DCAA,TCAA 5 disinfection by-products,which is suitable for the detection of drinking water.
维普
万方数据