不同长度烟丝色度与化学成分的变化及其相关性

Variations and Correlation of Color Value and Chemical Component in Cut Filler of Different Lengths

【目的】分析卷烟成品烟丝中不同长度烟丝色度值、常规化学成分的变化及其相关性,为色差法快速评价烟丝掺配均匀度提供技术依据。【方法】选择云烟品牌2种规格卷烟的成品烟丝作为材料,利用6层筛网的旋转筛分仪分别对成品烟丝进行筛分,得到2种规格卷烟不同长度的烟丝样品,制成粉末后测定其CIE-L^(*)a^(*)b^(*)色空间值和常规化学成分,并对不同长度烟丝的明度值(L^(*))、红度值(a^(*))、黄度值(b^(*))、总色差值(ΔE)及常规化学成分的差异、变化趋势以及色度值与常规化学成分间的Pearson相关性进行分析,最后对b^(*)与PV值(糖碱比与钾含量的乘积)进行回归分析。【结果】(1)在同一规格卷烟的成品烟丝中,不同长度烟丝的4个色度指标及6项常规化学成分均存在显著差异(P<0.05)。(2)随着烟丝长度的减小,a^(*)和ΔE值及总糖、还原糖和总植物碱含量逐渐降低,总氮含量逐渐升高,L^(*)和b^(*)值及钾和氯含量先升高后降低。(3)L^(*)值与总糖、还原糖和总植物碱含量显著负相关(P<0.05),与总氮、钾和氯含量显著(P<0.05)或极显著(P<0.01)正相关;a^(*)、ΔE值与总糖、还原糖和总植物碱含量极显著正相关(P<0.01),与总氮和钾含量显著(P<0.05)或极显著(P<0.01)负相关;b^(*)值与氯含量和PV值显著(P<0.05)或极显著(P<0.01)正相关,且b^(*)值与PV值之间存在高度拟合的线性关系。【结论】在卷烟成品烟丝中,色度值与其常规化学成分之间存在较高的相关性,为色差法快速评价烟丝掺配均匀度提供了技术依据。

[Purpose]In order to provide technical basis for the rapid evaluation of tobacco structure distribution stability and cut tobacco blending uniformity by color difference method,the variations and correlation of color values and routine chemical component in cut filler of different lengths were analyzed.[Method]The cut filler of two types of cigarettes of Yunyan brand were sieved by a rotary screener with 6-layer screen.The color values,lightness value(L^(*)),redness value(a^(*)),yellowness value(b^(*)),total color different(ΔE)and routine chemical component in cut tobacco of different lengths were measured and used to construct Pearson correlation between the color values and routine chemical components.Finally,the functional relationships between the b^(*)and PV value(product of sugar-nicotine ratio and potassium content)was constructed.[Results]1)There were significant differences in the four color indexes and six routine chemical components in cut tobacco of different lengths of the same specification cigarette(P<0.05).2)With the decrease of cut tobacco length,a^(*),ΔE values and the contents of total sugar,reducing sugar,total alkaloids decreased gradually,the content of total nitrogen increased gradually,the L^(*),b^(*)values and the contents of potassium,chlorine increased first and then decreased.3)The L^(*)value significantly negatively correlated to the contents of total sugar,reducing sugar and total alkaloids(P<0.05),and significantly(P<0.05)or extremely significantly(P<0.01)positively correlated to the contents of total nitrogen,potassium and chlorine.The a^(*),ΔE values extremely significantly(P<0.01)positively correlated to the contents of total sugar,reducing sugar and total alkaloids,and significantly(P<0.05)or extremely significantly(P<0.01)negatively correlated to the contents of total nitrogen,potassium and chlorine.The b^(*)value significantly(P<0.05)or extremely significantly(P<0.01)positively correlated to the content of chlorine and PV value,and there was a highly fitted linear relationship between b^(*)and PV value.[Conclusion]There was a high correlation between the color values and the contents of routine chemical components in cut filler,which provide a technical basis for the rapid evaluation of cut tobacco blending uniformity by color difference method.