为找出河南烤烟不协调的化学组分，采用气相色谱/质谱联用仪（GC/MS）内标定量检测挥发性香气物质和连续流动分析法检测常规化学成分，对河南浓香型优质烤烟与巴西烤烟化学成分进行对比分析。结果表明：河南烤烟的还原糖、总糖平均值为20.94%、22.18%，总氮和烟碱平均值为1.87%、2.26%；钾含量平均值1.84%；钾氯比变异系数大44.99%，不稳定。巴西烤烟还原糖、总糖平均值为17.82%、19.52%，低于河南烤烟；总氮\烟碱和钾含量平均值较高为2.15%、3.00%和2.57%，钾氯比变异系数小15.55%，稳定。巴西烤烟总香气成分含量在985.36~1222.9 μg/g，高于河南烤烟772.4~1103.19 μg/g的范围，巴西烤烟的新植二烯、苯丙氨酸类、类西柏烷类和类胡萝卜素类含量高于河南烤烟；河南烤烟棕色化产物类含量高于巴西烤烟。

In order to provide the basis information for the discordant chemical components of flue-cured tobacco in Henan, the chemical components leaves were determined and compared in Henan and Brazil flue-cured tobacco. The volatile aromatic component was determined by gas chromatography–mass spectrometry (GC/MS) and a routine chemical component was tested by flow analyzer. The results showed that: the soluble total sugar average contents was 22.18% and the reducing sugar average contents was 20.94% in Henan. The average value of the nicotine, total nitrogen and potassium in Henan were 1.87%, 2.26% and 1.84%. The coefficient of variation of the ratio of potassium chloride was large, instable. The soluble total sugar average contents was 17.82% and the reducing sugar average contents was 19.52% in Brazil. The average value of the nicotine, total nitrogen and potassium in Henan were 2.15%, 3.00% and 2.57%. The coefficient of variation of the ratio of potassium chloride was small, stable. The total contents of aroma compositions of tobacco leaves in Brazil were 985.36-1222.9 μg/g and those were 772.4-1103.19 μg/g in Henan. The higher dissolutions of content of flue-cured tobacco in Brazil was neophytadiene, phenylalanine, carotenoid and cembranenoid, The dissolutions of browning reaction of flue-cured tobacco in Henan was the higher than in Brazil.