Based on the density differences of cut filler,a cut fillers homogeneity method which using CO2 expanded tobacco as the tracer was used to analyze the influence of sampling volume and frequency on the mixing uniformity of cut filler in cigarettes statistically. The results showed that: 1 ) the mean of CO2 expanded tobacco content in cigarette samples tended towards stability gradually while the standard deviation decreased and tended towards stability gradually with the increase of the sampling volume. The variance of expanded tobacco content showed significant difference when selecting the whole sampling volume as a group, and the variance of expanded tobacco content had not significant difference among the more than 90 g sampling amount group, while the mean of expanded tobacco content showed no obvious difference when the sampling amount is greater than 30 g. 2) The variance of expanded tobacco content in cigarette samples had not significant difference between each number of samples group while the mean of expanded tobacco content had not significant difference with the sample of 55 sampling number group when the sampling number reached 10.%利用烟丝密度的差异,以CO2膨胀烟丝作为示踪物,采用外加示踪物的均匀度作为反映混合物整体混合效果评价方法,测定了某牌号成品烟支中配方烟丝的混合效果,考察取样量和取样次数对混合均匀性检测的影响.结果表明:1)随着取样量(烟支数)的增加,烟支样品中膨胀烟丝含量的均值逐渐趋于稳定,标准偏差逐渐减小并趋于稳定；不同取样量样本中膨胀烟丝含量的方差整体差异显著,但当取样量增加到90 g时,膨胀烟丝含量的方差不随取样量的继续增大而变化；当取样量＞30 g时,成品烟支中配方烟丝的膨丝含量均值无显著差异.2)任意取样量的条件下的不同取样次数样品中膨胀烟丝含量的方差整体无显著性差异；当取样次数大于10次时,样品膨胀烟丝含量均值与取样次数55次的比较基准样本无显著性差异.
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