离子色谱法同时测定水中氟化物和5种低分子有机酸  

Simultaneous determination of fluoride and five small molecular organic acids in water by ion chromatography

作　　者：王秀莉[1] 于雪荣[1] 刘柏林[1] 单晓梅[1] 丁刚[1] 谢继安[1] WANG Xiuli;YU Xuerong;LIU Bolin;SHAN Xiaomei;DING Gang;XIE Ji'an(Physics and Chemistry Lab,Anhui er for Disease Control and Prevention,Hefei 230601,China)

机构地区：[1]安徽省疾病预防控制中心理化检验室,合肥230601

出　　处：《分析试验室》2025年第1期122-127,共6页Chinese Journal of Analysis Laboratory

摘　　要：建立了同时测定水中氟化物和5种低分子有机酸(甲酸、乙酸、丙酸、丁酸和丙烯酸)的离子色谱检测法。在优化条件下,氟化物和5种低分子有机酸在0.05~5.00 mg/L浓度范围内呈良好的线性关系,线性相关系数大于0.9998,方法检出限在0.2~1.5μg/L之间,其中氟化物、丙烯酸的检出限分别0.2,1.5μg/L,均低于其限值的1/1000。以末梢水为基质进行低(0.05 mg/L)、中(0.50 mg/L)、高(4.00 mg/L)3个浓度水平加标实验,平均回收率在93.4%~99.9%之间,相对标准偏差(RSD)在0.12%~3.0%之间。使用该方法对水中氟化物质控样品进行测定,RSD为0.11%,同时对出厂水、末梢水、地表水3类水样进行了测定。该方法解决了离子色谱法测定氟化物受低分子有机酸干扰的问题,同时能对5种低分子有机酸准确测定,在生活饮用水氟化物和丙烯酸等5种低分子有机酸的测定中有良好的实用价值。An ion chromatography method was established for simultaneous determination of fluoride and five small molecular organic acids including acrylic acid,formic acid,acetic acid,propionic acid,and butyric acid in water.Under the optimized experimental conditions,all the 6 analytes exhibited good linear relationships in the range of 0.05-5.00 mg/L,with the correlation coefficients greater than 0.9998.The limits of detection(LODs)of the target analytes were in the range of 0.2-1.5μg/L.Among which,The LODs of fluoride and acrylic acid were 0.2μg/L and 1.5μg/L,respectively,both below 1/1000 of their limit values in drinking water.Using tip water as the substrate,spiking experiments were conducted at three concentration levels of 0.05,0.50 and 4.00 mg/L,the recovery rates were 93.4%-99.9%and the relative standard deviations(RSDs)were 0.12%-3.0%.The RSD of fluoride control sample in water was 0.11%,and 3 types of water,includingfinished water,tip water,and surface water,were measured by this method.This method solved the problem of interference from small molecular organic acids in fluoride determination using ion chromatography,and accurate determination of five small molecular organic acids could be achieved at the same time.This method had good application in the determination of fluoride and five small molecular organic acids in drinking water.

关 键 词：离子色谱法 氟化物 低分子有机酸 丙烯酸 

分 类 号：O657[理学—分析化学]