A method for automatic and rapid digestion of food samples

A sample and fast technology, applied in the field of food hygiene physical and chemical inspection, can solve the problems of high labor intensity in screwing and cleaning tanks, many types of acids used, and small amount of digested samples, so as to achieve short digestion time and less reagent types and dosages. , the effect of avoiding the loss of mercury element

Active Publication Date: 2022-05-31
宁波市产品食品质量检验研究院(宁波市纤维检验所)
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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.

Method used

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  • A method for automatic and rapid digestion of food samples
  • A method for automatic and rapid digestion of food samples
  • A method for automatic and rapid digestion of food samples

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056]

[0058]

Embodiment 2

[0062]

Embodiment 3

In the case of clarification, most of the components in the sample are decomposed or transferred to the acid solution, but a small number of elements such as chromium need to be

It can be transferred out only under certain digestion conditions (temperature greater than 160°C, time greater than 20min, and nitric acid consumption greater than 4mL). send

Mingren has found through many experiments that the digestion temperature is too low, the digestion time is too short, and the amount of the digestion reagent is too small, which will affect the digestion of the sample.

If the digestion temperature is too high, it will affect the life of the digestion tube; if the digestion time is too long, it will affect the working efficiency.

rate; excessive consumption of digestion reagents will increase labor costs and increase environmental pollution.

The measurement result (n=3) of part element in table 5 GBW10049 (GSB-27) green onion

[0069]

[0070] Continue the above table

[00...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/44G01N27/626
CPCG01N1/44G01N27/62
Inventor 邢家溧张少华应璐张书芬郑睿行宿宇婷柯剑君石琳琳承海毛玲燕
Owner 宁波市产品食品质量检验研究院(宁波市纤维检验所)
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