【摘要】 建立了爆炸残留物中无机阴离子的毛细管离子色谱检测方法.分离柱为Dionex IonPac AS19Capillary柱,通过考察阴离子保留情况,选择以10μL·min-1流速的KOH梯度洗脱,进样量为0.4μL,对爆炸残留物中常见无机阴离子进行了分析.在上述条件下,Cl-,NO2-,ClO3-,NO3-,SO24-,SCN-,ClO4-能很好地分离,并在质量浓度为0.01～5.00μg·mL-1时与对应色谱峰面积之间的线性关系良好,检出限分别为0.36、0.46、1.25、0.92、1.06、1.61、2.65ng·mL-1,回收率为95.84%～102.40%.该方法简便、快速、准确,可用于实际样品的测定.更多还原

【Abstract】 A method was developed for the determination of inorganic anions in explosives residue by capillary ion chromatography.Chromatographic separation was performed on a Dionex IonPac CS19 capillary column,KOH gradient eluent was used.The linear ranges of the method for seven anions were 0.01～5.00 μg·mL-1,the correlation coefficients were between 0.999 3～0.999 8,and the detection limits(S/N=3) of Cl-,NO-2,ClO-3,NO-3,SO2-4,SCN-,ClO-4 were 0.36、0.46、1.25、0.92、1.06、1.61、2.65 ng·mL-1 respectively.The method was successfully applied to determine inorganic anions in real samples.The recoveries of inorganic anions after spiking were between 95.84% to 102.40%.更多还原