【摘要】 以催化裂解富气吸收液为测定对象,建立吸收液中目标离子(包括NO2-,NO3-,SO42-)的离子色谱分析方法。在选定色谱柱的前提下,通过优化淋洗液浓度等色谱条件,实现了在大量干扰离子S2-及与SO42-相邻的未知离子存在的三乙醇胺溶液中目标离子的定量。方法的检出限分别为NO2-62μg/L,NO3-26μg/L,SO42-90μg/L,RSD值为0.73%~1.19%,加标回收率在91%~109%。更多还原

【Abstract】 NO_x and SO₂ from catalytic cracking gas containing in triethanol amine（TEA） solutions were determined by ion chromatography.The target ions include NO^-₂,NO^-₃,and SO^2-₄.Optimization of ion chromatographic operating conditions such as the concentration of mobile phase was discussed.The method can be used for the analysis of the target ions with the presence of interfering ions such as S^2-and other unknown species.The limits of determination for NO^-₂,NO^-₃,and SO^2-₄ were 62,26,and 90 μg/L,respectively,with relative standard deviations in the range of 0.73%-1.19%.The recoveries of the target ions from spiked TEA solutions with a mixture of three ions were 91%-109%.更多还原