A method for automatic and rapid digestion of food samples

Abstract

The invention discloses a method for automatically and quickly digesting food samples, which belongs to the technical field of food sanitation physical and chemical testing. The present invention uses a fully automatic graphite digestion instrument to digest food samples. During the digestion process, a matching cover needs to be placed on the digestion tube, and the bottom 1 / 4 to 1 / 2 of the digestion tube body is heated in the graphite hole. The invention overcomes the shortcomings of the current food sample digestion methods, such as the long time of dry digestion, easy pollution, inapplicability to the determination of volatile elements such as arsenic, mercury, tin, selenium, etc.; wet digestion uses a large amount of acid, There are many kinds of acid used, long digestion time, large blank value, easy to pollute the environment, unsuitable for the determination of mercury, etc.; the risk of high-pressure tube explosion in microwave digestion, small amount of digestion sample, and high labor intensity for screwing and cleaning the tank.

Description

A method for automatic and rapid digestion of food samples technical field The present invention relates to a kind of method of automatic quick digestion food sample, belong to the field of food hygiene physical and chemical inspection technology area. Background technique [0002] Analysis and determination of elements in food, sample pretreatment is an important link. The current "Food Hygiene Inspection Methods" Chemical part) "GB5009 series of pretreatment methods for determining elements in samples is mainly digestion treatment, the purpose of which is to destroy organic analyte, dissolved particulate matter, oxidize the analyte in various valence states to a single high valence state or convert it into an inorganic compound that is easy to decompose to obtain a clear and transparent concentrated solution without precipitation for detection and analysis. The digestion treatment methods mainly include dry digestion, wet digestion These methods have their own adv...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned problems, the present invention uses a fully automatic graphite digestion instrument, adopts the digestion tube to cover and reflow, and the bottom 1 / 4 to 1 / 2 of the digestion tube is located in the graphite hole to heat and digest, and develops a new automatic rapid digestion method. Realize automatic digestion, short digestion time, less reagent types and dosage, less environmental pollution, suitable for determination of various elements in food (including volatile mercury elements), overcome the shortcomings of current food sample digestion methods, such as dry digestion Disadvantages such as long time, easy pollution, not suitable for the determination of volatile elements such as arsenic, mercury, tin, selenium, etc.; wet digestion (automatic graphite digestion method) uses a large amount of acid, many types of acid, long digestion time, blank Disadvantages such as large value, easy to pollute the environment, and unsuitable for determination of mercury elements; the risk of high-pressure explosion tubes in microwave digestion, the small amount of digested samples, and the labor intensity of screwing and cleaning tanks, etc.

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