利用色差法测定配方烟丝中的梗丝含量

Determination of Cut Stem Content in Cut Filler by Chromatic Aberration Method

【目的】建立一种简单、快捷、准确的梗丝含量测定方法,为评价梗丝有效利用率和掺配均匀性提供技术手段。【方法】将梗丝和叶丝分别制成粉末后配制成具有不同梗丝含量的烟末,各试验样品充分混匀后使用色差计测定其CIE–L*a*b*色空间值;以混合烟末与纯叶丝烟末之间的Hunter色差ΔE为自变量,以梗丝含量为因变量建立两者之间的函数模型,并对函数模型的准确度、精密度和重复性进行验证。【结果】建立了梗丝含量与Hunter色差ΔE的线性回归模型,模型拟合度高,决定系数为0.9995;工作模型准确度测试的相对误差为2.00%~3.37%,精密度测试的变异系数为1.98%~2.72%,重复性测试的变异系数为2.40%,均符合定量分析的要求。【结论】建立了一种基于色差法推导配方烟丝中梗丝含量的测定方法,该方法操作简单、快捷、成本低、准确度和精密度高、重复性较好,适用于配方烟丝中梗丝含量的测定。

[Purpose]To establish a simple,rapid and accurate method for the determination of cut stem content in order to provide a technical means for the evaluation of effective utilization rate and blending uniformity of cut stem.[Method]The cut stem and cut tobacco were made into powder respectively,and then tobacco powder with different stem content was prepared.The CIE–L*a*b*color space value of each test sample was measured by colorimeter after it was fully mixed.The Hunter chromatic aberrationΔE between mixed tobacco powder and pure tobacco powder was used as the independent variable,and the stem content was used as the dependent variable to establish the function model between them,and the accuracy,precision and repeatability of the function model were verified.[Results]The linear regression model between cut stem content andΔE was established,the model had high fitting degree and the determination coefficient was 0.9995.The relative error of the accuracy test of the working model was 2.00%-3.37%,the variation coefficient of the precision test was 1.98%-2.72%,and the variation coefficient of the repeatability test was 2.40%,all of which met the requirements of quantitative analysis.[Conclusion]A method for the determination of cut stem content in cut filler based on chromatic aberration method was established.The method was simple,rapid,low cost,high accuracy,precision and good repeatability,and it was suitable for the accurate determination of cut stem content in cut filler.