Study on Rapid Determination Method of Soluble Solid Content in Extraction Liquid of Reconstituted Tobacco
In order to accurately,uniformly and rapidly determine the solid content(mass fraction)in the extract of paper-making reconstituted tobacco.The soluble solid content in the extract was deter-mined by refractometric method and by classical gas chromatography simultaneously method,through the establishment of the standard curve,the repeatability of the method,the intermediate precision of the method,the co-validation experiment and the determination of the products of the reconstituted to-bacco enterprise.The relative standard deviation(RSD)of the repeatability experiment of this method is less than 1.00％,and the relative standard deviation(RSD)of the intermediate precision is less than 1.02％.The RSD of the solid content measured at different locations is between 4.99％and 5.60％.The absolute difference in the determination of the solid content of the extraction solution by different in-struments is less than 1.50％,and the time for measuring a sample using the refractive index method is less than 20 seconds.The method has good operability,reliability and reproducibility,and is suitable for rapid determination of soluble solid content in the extract of paper-making reconstituted tobacco.
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