Method for determining starch content in tobacco

Abstract

The invention relates to a method for determining the starch content in tobacco, which comprises the following steps: weighing a dried and smashed tobacco sample, placing in a beaker, adding distilled water for boiling, cooling, then setting the volume by using the distilled water, shaking up, filtering and preparing a sample reagent; setting the volume of 75-85% phosphoric acid by using the distillated water, adding a 22% polyoxyethylene lauryl ether reagent, and preparing a phosphoric acid reagent; weighing potassium iodate and potassium iodide, setting the volume by using the distilled water, adding the 22% polyoxyethylene lauryl ether reagent, and preparing a potassium iodate / potassium iodide reagent; weighing amylase and amylopectin, commonly dissolving in the distilled water, setting the volume and preparing a standard stock solution reagent; and sequentially carrying out sample injection on all the reagents through the program run of a continuous flow analyzer, and determining the starch content in the sample at a certain wavelength. The method can save the reagents, eliminate the potential safety hazard of experimental staff, protect the instrument and lead the determined starch content in the tobacco to be closer to the true value.

Description

technical field [0001] The invention relates to a tobacco detection technology, in particular to a method for detecting starch content in tobacco. Background technique [0002] Starch is an important carbohydrate in tobacco. Sugars in the form of starch will affect the burning speed and completeness of burning when cigarettes are smoked, and will produce a burnt smell when burning. Starch content has become an important indicator of tobacco quality evaluation, so it is of great significance to quickly and accurately determine the starch content in tobacco, and the determination of starch content in cured tobacco leaves and finished tobacco has certain significance for monitoring the internal quality of tobacco leaves. [0003] In recent years, with the widespread use of continuous flow analyzers in the tobacco industry, people have gradually developed the use of continuous flow analyzers to determine the content of starch in tobacco. Analysis by continuous flow analyzer has...

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Problems solved by technology

[0006] This method has the following disadvantages: in the process of sample pretreatment and instrument analysis, reagents such as alcohol and perchloric acid need to be added, and a large amount of reagents are used, and because perchloric acid is a strong acid and a strong oxidant, it is highly corrosive At the same time, perchloric acid fumes are irritating to the skin and mucous membranes, especially eroding the eyes and nasal mucous membranes, and there are certain safety hazards for operators; during the operation of the instrument, a large amount of perchloric acid will enter the pipeline, which will damage the pipeline. The service life will be greatly reduced, and it will also cause certain corrosion to the optical path components in the continuous flow analyzer; the detection accuracy is not very good

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