Abstract: In order to accurately determine the yields of methylamine and ethylamine in sidestream cigarette smoke, a dilute hydrochloric acid solution absorption-ion chromatography method was established by investigating the means for smoke capturing and optimizing chromatographic conditions, and the yields of methylamine and ethylamine in sidestream smoke of 10 cigarette samples of different types and tar yields were determined. The results showed that: 1) With 0.01 mol/L hydrochloric acid for particulate phase extraction and gas phase absorption, by adopting Ion Pac CS16 separation column at the column temperature of 60 Ⅲ, and taking 10 mmol/L of methane sulfonic acid(MSA) as mobile phase of gradient elution, the target analytes were effectively separated. 2) This method exhibited good linearity in the range of 0.02-2.00 μg/m L. With the relative standard deviation(RSD) less than 3%, the limits of detection were 2.58 and 3.65 μg/L and the average recoveries were in the range of85.1%-102.1% and 80.7%-107.3% for methylamine and ethylamine, respectively. 3) The methylamine and ethylamine emission in sidestream smoke of 10 samples differed significantly within the ranges of 15.0-31.7 and 2.9-9.4 μg/cig, respectively, and mainly existed in gas phase.This method is suitable for the quantitative analysis of methylamine and ethylamine insidestream cigarette smoke.