离子色谱法检测爆炸残留物中的氯酸根和高氯酸根

采用Dionex IonPac AS20高容量阴离子分析柱,KOH梯度洗脱和抑制电导离子色谱法检测爆炸残留物中氯酸根和高氯酸根。结果表明,氯酸根和高氯酸根在1～100 mg/L范围内具有良好的线性和重现性。该方法对ClO3-离子的检出限为0.05 mg/L,回收率为96.4%～101.1%,RSD为3.2%～3.8%;对ClO4-离子的检出限为0.1 mg/L,回收率为90.2%～102.3%,RSD为2.2%～4.4%。该方法具有快速、准确、灵敏等优点,已成功应用于实际案件的检验中。

Determination of Chlorate and Perchlorate in Explosive Residues by Ion Chromatography

The method was developed for the determination of chlorate and perchlorate in explosive residues by ion chromatography.The sample was separated by high capacity anion-exchange column（IonPac AS20） with gradient elution of KOH and determined by Ion Chromatography with suppressor conductivity detector.The result showed that chlorate and perchlorate is linear with excellent recurrence in the range from 1 mg/L to 100 mg/L.The detection limit,recovery and RSD of chlorate was 0.05mg/L,in the range of 96.4%～101.1%,and in the range of 3.2%～3.8% respectively.The detection limit,recovery and RSD of perchlorate was 0.1mg/L,in the range of 90.2%～102.3%,and in the range of 2.2%～4.4%.This method was rapid,accurate and sensitive,which can be applied to the real cases successfully.