【摘要】 目的建立碱熔-离子色谱法测定土壤中氟的分析方法。方法用Metroep A Supp5-250阴离子分析柱分离,3.2mmol/LNa2CO3+1.0mmol/LNaHCO3淋洗液,流速为0.7ml/min,化学抑制电导检测器。样品于镍钳锅500℃碱熔,溶解、过滤、进样分析。结果本法相关性好(r>0.9996),相对标准差为2.37%～4.71%,样品平均加标回收率在84.0%～95.5%之间,样品的最低检出限为1.2mg/kg。结论本法操作简单、快速、准确、灵敏,适合于大批量土壤中氟的测定。更多还原

【Abstract】 Objective To develop an analytical method for the determination of fluoride in soil by using alkalifusion for sample preparation and ion chromatography.Methods The method was based on ion chromatography separation under the condition eluent with 3.2 mmol/lNa2CO3 plus 1.0 mmol/NaHCO3 and flow rate of 0.7 ml/min,by using of the Metrosep A Supp 5-250 anion-exchange column and suppressed conductivity detector.Samples were fused in nickel crucibles with sodium hydroxide at 500℃.The ash was dissolved and filtered for analysis.Results The method had good relativity(r>0.9996),the RSD of the method was 2.37%～4.71%,the extraction recovery was 84.0%～95.5%,and the detection limit was 1.2 mg/kg.Conclusions The method has the advantages of simple operation,quickness,high sensitivity,and precise results,which can be applied widely and is suitable for trace analysis of soil samples.更多还原