离子色谱法测定土壤水溶性三氟乙酸的方法研究
Study on the Method of Determination of Water-soluble Trifluoroacetic Acid in Soil by Ion Chromatography
王金瑜1
作者信息
- 1. 上海申泽环保科技有限公司,上海 201108
- 折叠
摘要
研究了测定土壤中水溶性三氟乙酸(TFA)的分析方法.目的:建立离子色谱法测定土壤中水溶性三氟乙酸的含量.方法:色谱柱采用分析柱DionexTM IonPacTM AS11-HC(ϕ4 mm×250 mm),保护柱DionexTM Ion-PacTM AG11-HC(ϕ4 mm×50 mm),流动相:10 mmoL/L氢氧化钾,流速:1.0 mL/min,柱温:30℃,进样量:250 μL,抑制器电流:25 mA,电导检测器.结果:三氟乙酸在 5.0～100.0 μg/L 范围内,线性关系良好,r=0.9998;当样品量20.0 g时,三氟乙酸的检出限为 1 μg/kg,测定下限为 4 μg/kg;实际土壤样品测定精密度为10%、3.7%,实际土壤样品测定回收率为82.6%～92.2%.结论:此方法具有前处理操作快速、简单,准确率高等优点.
Abstract
An analytical method for the determination of water-soluble trifluoroacetic acid(TFA)in soil was studied.(Objective)Ion chromatography was established to determine the content of water-soluble trifluoroacetic acid in soil.(Methods)The analytical column Dionex IonPac AS11-HC(ϕ4 mm ×250 mm),the guard column DionexTM IonPacTM AG11-HC(ϕ4 mm × 50 mm),mobile phase:10mmol/L potassium hydroxide,flow rate:1.0 mL/min,column temperature:30 ℃,injection volume:250 μL,suppressor current:25 mA,conductivity detector.(Results)The linear relationship of trifluoroacetic acid in the range of 5.0～100.0 μg/L was well,r=0.9998,and the detection limit of trifluoroacetic acid was 1 μg/kg and 4 μg/kg when the sample volume was 20.0 g.The precision of the actual soil samples was 10％ and 3.7％,and the recovery rate of the actual soil samples was 82.6％-92.2％.(Conclusion)This method has the advantages of fast and simple pre-processing operation and high accuracy.
关键词
土壤/三氟乙酸/离子色谱仪/电导检测器Key words
Soil/Trifluoroacetic acid/Chromatography/Conductivity detectors引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据