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Phenolic compounds are important flavor precursors in tobacco. The quantity of phenolic compounds is one of the most important evaluation indicators of tobacco quality. The content of nicotine affects not only the quality of tobacco products but also the health of smokers. It is of high importance to determine nicotine and phenolic compounds in tobacco for quality control and the health of smokers. Nicotine, rutin, chlorogenic acid, quercetin, ferulic acid, gallic acid, and protocatechuic acid are determined by capillary electrophoresis in combination with the detection electrodes that are fabricated by packing the composite of carbon nanotube and epoxy in pipette tips.