离子色谱法测定工业废水中甲酸根、乙酸根和氯离子

Determination of formate, acetate and chloride in industrial wastewater by ion chromatography

目的建立离子色谱法测定工业废水中甲酸、乙酸和氯离子的方法。方法用离子色谱法检测,外标法定量,以NaOH为淋洗液梯度洗脱,经lonpacAS11_HC型分析柱,流速1mL/min,柱温和检测池温度为30℃。结果甲酸、乙酸和氯离子在0.05~10.0 mg/L线性关系良好(r>0.9994);方法检出限为0.02~0.05 mg/L。本方法在添加水平分别为0.05、1.0、2.0 mg/L时,加标回收率为91.8%~95.8%,相对标准偏差为2.35%~5.34%,检出限为0.02~0.05 mg/L。结论本方法准确、专属、灵敏,所需样品量小,操作简便可靠。

Objective To establish a method for the determination of formic acid,acetic acid and chloride in industrial wastewater by ion chromatography.Methods It was detected by Ion chromatography detection,,quantified by external standard,,eluted with NaOH as eluent gradient,and passed through a lonpac AS11_HC type analytical column at a flow rate of 1 mL/min.The temperature of column and temperature detection cell temperature was 30℃.Results The linear relationship between formic acid,acetic acid and chloride ions was 0.05-10.0 mg/L(r>0.9994).The detection limit of the method was 0.02-0.05 mg/L.When the addition levels were 0.05,1.0,and 2.0 mg/L,the recoveries of the standard were 91.8%to 95.8%,the relative standard deviations were 2.35%to 5.34%,and the detection limits were 0.02 to 0.05 mg/L.Conclusion This method is accurate,exclusive and sensitive,requires a small amount of sample,is easy to operate and reliable.