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

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 aberration ΔE 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 and ΔE was established, the model had high fitting degree and the determination coefficient was 0.999 5. 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.