Research on module-split homogenization processing method based on near-infrared spectroscopy
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Abstract
In order to reduce the coefficient of variation (CV) of nicotine in redried tobacco strips, representative samples were taken from each grade and each category of sorted strips according to the principle of “wide coverage” and were detected by a near-infrared spectrometer in laboratory. Based on the detected nicotine content (mass fraction) in redried strips, a whole blended tobacco module of cured tobacco strips was divided into multiple submodules, wherein several sections with different nicotine content ranges were preset. The redried strips in each submodule were prepared and spread on the spreading belt by bundles, then were classified into interval modules with different nicotine contents obtained by online near-infrared detection. After being warehoused, all framed strips were prepared for the second time according to the proportion of each section module on the spreading table for production. Through detection, the coefficient of variation of nicotine in redried strips packed into cases was 2.86%. The results showed that this method significantly reduced the coefficient of variation of nicotine in redried strips and improved the processing quality of redried strips produced by redrying factories.
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