In order to improve the determination efficiency of ammonia(NH3)in mainstream cigarette smoke,rnion chromatography(IC)method described in the current standard(YC/T377-2010)was improved, meanwhilernNHj deliveries in mainstream cigarette smoke under ISO and Health Canada (HC) smoking regimes wererncompared. The results showed that: 1)with CS16 column under an isocratic elution with 50 mmol/L of methanernsulfonic acid (MSA)as mobile phase at the flow rate of 0.60 mL/min, the determination of NH3 in one singlernsample could be completed within 15 minutes; 2)the recoveries of NH3 ranged from 97.53% to 99.13% with thernrelative standard deviation(RSD) lower than 5%; 3)the NH3 delivery in mainstream smoke of cigarette smokedrnunder HC regime was significantly higher than that under ISO regime.%为了提高卷烟主流烟气中氨(NH3)的测定效率,对现行标准YC/T 377-2010的离子色谱(IC)测定方法进行了改进,并考察了ISO和加拿大深度抽吸(HC)模式下卷烟主流烟气中NH3释放量变化.结果表明:①采用Ion Pac CS16分析柱、等度洗脱、0.60 mL/min流速和50 mmol/L甲烷磺酸(MSA)淋洗液,15 min内即可完成单个卷烟样品中NH3的测定；②NH3的加标回收率为97.53％ ～ 99.13％,相对平均标准偏差(RSD)＜5％；③HC模式下主流烟气中NH3含量明显高于ISO抽吸模式下的含量.
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