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Method of semi-quantitative rapid detecting formaldehyde content in aquatic product

A formaldehyde content, semi-quantitative technology, applied in material analysis by observing the influence of chemical indicators, and analysis by chemical reaction of materials, etc. Reagent quality, time-consuming and other problems, to achieve good reliability, low price, low sample cost

Inactive Publication Date: 2003-11-12
汤新华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional detection method of formaldehyde has high technical requirements for inspectors, and it is difficult to guarantee the quality of reagents. It is time-consuming and laborious, and cannot meet the sensitive, simple and fast objective needs of industrial and commercial management departments in on-site detection in farmers' markets.

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0007] The present invention will be further described below in conjunction with a preferred embodiment.

[0008] After chopping or grinding about 5 grams of the sample to be tested, weigh about 1 / 3 cup into a numbered sample cup, add about 10ml of distilled water (subject to just submerging the sample) and soak for about 30 minutes, with at least shaking during the period 2 times.

[0009] From left to right, add 250ul distilled water (blank control), 250ul standard (about 5 drops) and several sample soaking solutions to the blank multi-well plate (it is recommended to add 2 holes for each sample, 250ul per hole, use a disposable graduated pipette can be).

[0010] Sequentially add 100ul of detection solution to the two wells of the "blank" and the standard on the multi-well plate, and add two drops (100ul) of detection solution to the detection well of each sample.

[0011] Observe the color reaction, the "blank control" is colorless, and the "standard control" is orange-r...

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Abstract

The sodium hydroxide solution of phloroglucinol is as the detection liquid. The concentration of phloroglucinol is 1% and the concentration of sodium hydroxide is 12%. Several portions of formalin with the concentration from 0-500 ppm are utilized as the standard substances. When detection of formalin ingredient is carried out, the detection liquid drops to the samples to be tested and the several standard substances. With the color being changed, observing the changer color making the qualitative or semi quantitative determination. The color of the sample to be tested is compared with the colors of standard substances with different grads. If the color of the sample tested is between the colors of standard substances with adjacent concentration values, then the formalin concentration of the sample to be tested is between the products from the concentration and the diluent times.

Description

technical field [0001] The invention relates to a method for semi-quantitative and rapid detection of formaldehyde content in aquatic products. Background technique [0002] Formaldehyde is a colorless gas with a pungent smell, easily soluble in water, even dilute formaldehyde solution can cause irreversible coagulation of cytoplasmic proteins, inhibit cell function and even kill cells, and can damage liver, kidney and central nervous system The International Institute for Cancer Research (IARC) lists formaldehyde as one of the suspected carcinogens. The traditional detection method of formaldehyde has high technical requirements for inspectors, and it is difficult to guarantee the quality of reagents, and it is time-consuming and laborious. It cannot meet the sensitive, simple and fast objective needs of industrial and commercial management departments in on-site detection in farmers' markets. Contents of the invention [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
Inventor 汤新华
Owner 汤新华
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