【摘要】 为了避免离子色谱分析氨时常见干扰离子钠对检测准确性的影响,首次利用氨与茚三酮显色反应的选择专一性,建立了使用氨基酸分析仪测定卷烟主流烟气中氨的分析方法。采用烟草行业氨检测标准(YC/T 377—2010)对烟气样品进行前处理,使用SYKAM LCAK06/Na(4.6×150 mm)离子色谱柱,钠系统缓冲液体系,通过优化氨基酸分析仪色谱分析条件,实现了氨的自动柱后衍生分离分析。结果表明,氨的质量浓度范围为0.1001~1.2019μg/mL时,峰面积与质量浓度具有良好的线性关系,相关系数为0.99958,方法的检出限0.142μg/支,RSD%为1.25%,平均回收率为97.6%。该方法不存在钠离子干扰问题,适用于卷烟主流烟气中氨的准确测定。更多还原

【Abstract】 In order to avoid the detrimental effect of Na+ to the determination of ammonia by ion chromatography,a new method was established and applied for ammonia determination in mainstream cigarette smoke by post-column derivatization with ninhydrin by using amino acid analyzer.The pretreatment for tobacco smoke samples was carried out according to the industrial standard method(YC/T 377-2010).The chromatographic conditions were optimized to achieve separation and post-column derivatization of ammonia by using SYKAM LCAK06/Na(4.6×150 mm) ion chromatogram column and Na+ buffer system.The results showed that the linear range of the proposed method was 0.1001-1.2019 μg/mL,the detection limit was 0.145 μg/cig,with the RSD% and the average recovery rate were 1.25% and 97.6%,respectively.This method has a distinct advantage in interference of Na+ and is adequate for quick and sensitive determination of ammonia in mainstream cigarette smoke.更多还原