Method for testing content of calcium carbonate in paper-making process regenerated tobacco leaf

Abstract

The invention discloses a method for testing the content of calcium carbonate in paper-making process regenerated tobacco leaves. The method comprises the following steps: extracting water-soluble components in a first part of regenerated tobacco leaves of a regenerated tobacco leaf sample by using hot water, wherein the mass of the first part of the regenerated tobacco leaves is m1 and the water content of the first part of the regenerated tobacco leaves is w; putting filtering paper of which the mass is m0 into a Buchner funnel, filtering the extract in vacuum, drying and cooling the filtering paper and a first part of residues, wherein the mass of the filtering paper and the first part of residues is m2; further extracting the water-soluble components in a second part of regenerated tobacco leaves by using hot water, wherein the mass of the second part of the regenerated tobacco leaves is m1DEG and the water content of the second part of the regenerated tobacco leaves is w; cooling to 20-30 DEG C, adding an acid solution, and oscillating for 20-30 minutes; putting filtering paper of which the mass is m0 DEG into the Buchner funnel, filtering the extract in vacuum, drying and cooling the filtering paper and a second part of residues, wherein the mass of the filtering paper and the second part of residues is m3 DEG; respectively calculating the percentage contents of the first part of the residues and the second part of the residues according to determined calculation equations and the obtained parameters, and finally calculating the percentage content of calcium carbonate based on a dry base. The method is simple and convenient, accurate in detection and good in stability.

Description

technical field [0001] The invention belongs to the technical field of detection of reconstituted tobacco leaves by papermaking methods, and in particular relates to a method for measuring calcium carbonate content in reconstituted tobacco leaves by papermaking methods. Background technique [0002] Paper-making reconstituted tobacco leaves are sheet-like regenerated products made by paper machines by using discarded tobacco stems, tobacco dust, shredded tobacco pieces and other tobacco materials as raw materials, through extraction, beating, concentration, papermaking and drying processes. At present, the proportion and scope of the use of reconstituted tobacco leaves in cigarettes has been greatly increased, because reconstituted tobacco leaves can save tobacco leaf materials and reduce the cost of cigarettes. In addition, with the gradual increase in the proportion and scope of the use of paper-making reconstituted tobacco in cigarette formulations, cigarette companies ha...

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Problems solved by technology

[0003] Previously reported methods for calcium carbonate content in reconstituted tobacco include: Chinese patent (CN 102830174A) discloses a method to identify the level of calcium carbonate in reconstituted tobacco by detecting the signal attenuation value received by an ultrasonic receiver. This method cannot directly measure reconstituted tobacco content of calcium carbonate in the medium; Chinese patent (CN 102901791A) discloses a method for measuring the total calcium ion content in reconstituted tobacco leaves by ion chromatography. CN 103743803A) A method for measuring the calcium carbonate retention rate of reconstituted tobacco leaves by papermaking method. The method uses a potentiometric titrator to measure the calcium ion concentration in the materials of the two-stage process, and calculates the calcium carbonate retention rate of the front and rear stages of the process. This method cannot avoid other The influence of calcium salt (except calcium carbonate), so it cannot accurately reflect the content of calcium carbonate in the material

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