Meng Hong-Bo, Wang Tian-Ran, Guo Bao-Yuan, Hashi Yuki, Guo Can-Xiong, Lin Jin-Ming
Faculty of Science, Beijing University of Chemical Technology, Beijing 100029, China.
Talanta. 2008 Jul 15;76(2):241-5. doi: 10.1016/j.talanta.2008.01.054. Epub 2008 Feb 5.
A non-suppressed ion chromatographic method by connecting anion-exchange and cation-exchange columns directly was developed for the separation and determination of five inorganic anions (sulfate, nitrate, chloride, nitrite, and chlorate) and three cations (sodium, ammonium, and potassium) simultaneously in explosive residues. The mobile phase was composed of 3.5mM phthalic acid with 2% acetonitrile and water at flow rate of 0.2 mL/min. Under the optimal conditions, the eight inorganic ions were completely separated and detected simultaneously within 16 min. The limits of detection (S/N=3) of the anions and cations were in the range of 50-100 microg/L and 150-320 microg/L, respectively, the linear correlation coefficients were 0.9941-0.9996, and the R.S.D. of retention time and peak area were 0.10-0.29% and 5.65-8.12%, respectively. The method was applied successfully to the analysis of the explosive samples with satisfactory results.
建立了一种直接连接阴离子交换柱和阳离子交换柱的非抑制离子色谱法，用于同时分离和测定爆炸残留物中的五种无机阴离子（硫酸根、硝酸根、氯离子、亚硝酸根和氯酸根）和三种阳离子（钠离子、铵离子和钾离子）。流动相由含2%乙腈的3.5mM邻苯二甲酸和水组成，流速为0.2 mL/min。在最佳条件下，8种无机离子在16分钟内完全分离并同时检测。阴离子和阳离子的检测限（S/N=3）分别在50-100μg/L和150-320μg/L范围内；线性相关系数为0.9941-0.9996；保留时间和峰面积的相对标准偏差分别为0.10-0.29%和5.65-8.12%。该方法成功应用于爆炸样品的分析，结果令人满意。
