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Method and device for rapid semiquantitative field detection of nitrite in food

A detection device and nitrite technology are applied in the direction of material analysis by observing the influence on chemical indicators, and analysis by causing chemical reactions to occur in materials, etc., which can solve the problems of cumbersome display values ​​in sample extraction, and achieve simple, convenient and efficient methods. Detect easy effects

Inactive Publication Date: 2013-05-01
CHANGCHUN JILIN UNIV LITTLE SWAN INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to various reasons, the semi-quantitative food nitrite test strips on the market have disadvantages such as sample extraction is cumbersome, and the displayed value needs to be converted into the national standard method.

Method used

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  • Method and device for rapid semiquantitative field detection of nitrite in food
  • Method and device for rapid semiquantitative field detection of nitrite in food
  • Method and device for rapid semiquantitative field detection of nitrite in food

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Embodiment Construction

[0025] The semi-quantitative on-site rapid detection method of nitrite in food of the present invention is mainly based on visual colorimetric detection. Therefore detection device comprises extraction bottle 3 (as image 3 shown), stirring pin 4 (as shown Figure 4 shown), dropper 2 (as figure 2 shown), test strip 5 (such as Figure 5 shown) and test strip can 1 (as figure 1 shown) and color scale card. in:

[0026] The extraction bottle 3 is used to contain the food sample to be inspected. Preferably, as image 3 As shown, the extraction bottle 3 has an extraction bottle main body 31 with one end open and a cover 32 that is movably connected with the opening end of the extraction bottle main body so as to be openable. Preferably, the extraction bottle body 31 is a round-bottom centrifuge tube, for example, a 5ml round-bottom centrifuge tube.

[0027] The stirring needle 4 is used for fully pulverizing the food sample in the extraction bottle 3 . Preferably, as Fi...

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Abstract

The invention provides a method and device for detection of nitrite in food and belongs to the field of food safety detection. The device comprises an extraction bottle used for holding a food sample, a mixing needle used for fully mixing and crushing the food sample in the extraction bottle, a burette used for dripping water into the extraction bottle holding the mixed and crushed food sample, a test strip used for being immersed into a food sample water solution to detect the content of nitrite, and a test strip tube used for holding the test strip, wherein a color chart is arranged on the outer wall of the test strip tube and used for comparing the test strip socked in the food sample water solution; and the unit of the corresponding nitrite contents marked on the color chart is the international unit. Through adding purified water to the sample, rapid field screening detection of nitrite can be realized conveniently and the method and the device can be extensively used in the field of food safety detection.

Description

technical field [0001] The invention belongs to the field of food safety detection, and in particular relates to a semi-quantitative on-site rapid detection method and device for nitrite in food. Background technique [0002] As we all know, nitrite is harmful to human health. There are strict restrictions on its content in food in national standards, and many detection methods have also been issued. [0003] Under normal circumstances, the extraction of nitrite samples by the national standard method is as follows: vegetables, fruits, meat, aquatic products, eggs and cheese, etc.: weigh 5g (accurate to 0.001g) to make a homogenized sample (if water is added during the preparation process) , should be converted according to the amount of water added), put it in a 50ml beaker, add 12.5ml of borax saturated solution, stir well, wash the sample into a 500ml volumetric flask with about 300ml of water at about 70°C, heat it in a boiling water bath for 15min, and take it out Coo...

Claims

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Application Information

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IPC IPC(8): G01N21/78
Inventor 于爱民王振德
Owner CHANGCHUN JILIN UNIV LITTLE SWAN INSTR
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