离子色谱法同时测定环境样品中的甲酸、乙酸、氯乙酸

Determination of Formic Acid,Acetic Acid,Chloroacetic Acid in Environmental Sample Using Ion Chromatography

采用离子色谱法同时测定环境样品中的甲酸、乙酸、氯乙酸,简便快速,准确性较好,灵敏度较高.甲酸、乙酸、氯乙酸的检出限依次为0.030,0.096,0.574 μg/mL（S/N=3）,在1～20 μg/mL浓度范围内均呈现良好的线性关系,相关系数（r）均大于0.998.将三种目标物定量加入到空白水样中,甲酸、乙酸、氯乙酸加标回收率均在95.04％ ～ 105.46％范围内,其RSD值均在1.65％ ～3.12％之间.结果表明,该法可应用于雨水、地下水、地表水等环境样品中甲酸、乙酸和氯乙酸的测定.

A method based on ion chromatography for the determination of formic acid, acetic acid and chloroacetic acid in environmental sample was described. This method is rapid, accurate, and has good sensitivity. The limit of detection （S/ N = 3） of formic acid, acetic acid and chloroacetic acid were 0.030, 0.096, 0.574 μg.mL, respectively. Good linearities were achieved for the targeted compounds over the range of 1 -20μg/mL. The average spike recovery for targeted compounds ranged from 95.05% to 105.46%, while the relative standard deviations （RSD） were in the range of 1.65% -3.12%. It is suitable for determination of formic acid, acetic acid and chloroacetic acid in rain, surface water and ground water.