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Chemical reagent for detecting formaldehyde in food and preparation method thereof

A technology of chemical reagents and formaldehyde, applied in the direction of material analysis through observation of the influence of chemical indicators, analysis and measurement devices through chemical reactions of materials, etc., can solve problems such as fetal malformation, chronic poisoning, hazards, etc., to achieve Good stability, high accuracy and easy to use

Inactive Publication Date: 2018-07-17
朱佳琪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The concentration of the aqueous solution can reach up to 55%, usually 40%. It is called formaldehyde water, commonly known as formalin (formalin), which is a colorless liquid with a pungent smell. , not to be detected in food, but the presence of formaldehyde has been detected in many foods to varying degrees. Long-term exposure to low-concentration formaldehyde can cause chronic poisoning, leading to dizziness, fatigue, neurasthenia, mental depression and chronic respiratory diseases. Formaldehyde The harm to infants and pregnant women is more serious, and can lead to serious consequences such as fetal malformation and miscarriage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A chemical reagent for detecting formaldehyde in food, comprising the following raw materials in parts by weight: 0.4 parts of ammonium acetate, 16 parts of ethanol, 0.8 parts of disodium hydrogen phosphate dodecahydrate, 0.1 part of luminol, 4 parts of sulfur, and bile alum 3 parts, sodium hypochlorite 2 parts, oxalic acid 2.4 parts, acetylacetone 4 parts, petroleum ether 5 parts and potassium chloride 1.5 parts.

[0021] The preparation method of the chemical reagent for the detection of formaldehyde in food, the specific steps are as follows:

[0022] Step 1, taking various raw materials according to parts by weight, for subsequent use;

[0023] Step 2, mixing disodium hydrogen phosphate dodecahydrate, luminol, sulfur, sodium hypochlorite and oxalic acid and adding distilled water three times the total weight, stirring evenly, heating to 59 degrees Celsius and keeping it for 18 hours to obtain the first mixed solution;

[0024] Step 3, mixing ammonium acetate, ethan...

Embodiment 2

[0028] A chemical reagent for detecting formaldehyde in food, comprising the following raw materials in parts by weight: 0.6 parts of ammonium acetate, 18 parts of ethanol, 1.2 parts of disodium hydrogen phosphate dodecahydrate, 0.16 parts of luminol, 4.5 parts of sulfur, bile alum 4 parts, 2.8 parts of sodium hypochlorite, 3.2 parts of oxalic acid, 5.5 parts of acetylacetone, 5.2 parts of petroleum ether and 2 parts of potassium chloride.

[0029] The preparation method of the chemical reagent for the detection of formaldehyde in food, the specific steps are as follows:

[0030] Step 1, taking various raw materials according to parts by weight, for subsequent use;

[0031] Step 2, mixing disodium hydrogen phosphate dodecahydrate, luminol, sulfur, sodium hypochlorite and oxalic acid and adding distilled water 2-3 times the total weight, stirring evenly at a speed of 270rpm, heating to 64 degrees Celsius and maintaining it for 18 hours to obtain the first mixed solution;

[0...

Embodiment 3

[0036] A chemical reagent for detecting formaldehyde in food, comprising the following raw materials in parts by weight: 0.8 parts of ammonium acetate, 21 parts of ethanol, 1.7 parts of disodium hydrogen phosphate dodecahydrate, 0.35 parts of luminol, 5.4 parts of sulfur, bile alum 5.2 parts, sodium hypochlorite 4 parts, oxalic acid 3.8 parts, acetylacetone 7 parts, petroleum ether 5.6 parts and potassium chloride 2.5 parts.

[0037] The preparation method of the chemical reagent for the detection of formaldehyde in food, the specific steps are as follows:

[0038] Step 1, taking various raw materials according to parts by weight, for subsequent use;

[0039] Step 2, mixing disodium hydrogen phosphate dodecahydrate, luminol, sulfur, sodium hypochlorite and oxalic acid and adding distilled water three times the total weight, stirring evenly, heating to 62 degrees Celsius and keeping it for 20 hours to obtain the first mixed solution;

[0040] Step 3, mixing ammonium acetate, e...

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Abstract

The invention discloses a chemical reagent for detecting formaldehyde in food and a preparation method thereof. The chemical reagent is prepared from, by weight, 0.4-0.9 part of ammonium acetate, 16-22 parts of ethyl alcohol, 0.8-2 parts of disodium hydrogen phosphate dodecahydrate, 0.1-0.4 part of luminol, 4-6 parts of sulphur, 3-6 parts of chalcanthite, 2-5 parts of sodium hypochlorite, 2.4-4.5parts of oxalic acid, 4-8 parts of acetylacetone, 5-6 parts of petroleum ether and 1.5-3 parts of potassium chloride. The raw materials are wide in source, the preparation technology is simple, use isconvenient, whether food contains formaldehyde or not can be judged rapidly and accurately, the accurate rate is high, and the using stability is good.

Description

technical field [0001] The invention relates to a chemical reagent, in particular to a chemical reagent for detecting formaldehyde in food. Background technique [0002] With the development of social economy, the products on the market are becoming more and more diversified, but at the same time, there are also some fake and shoddy products, which disrupt the market and endanger the interests of consumers, especially food, fake or shoddy or shoddy, and may even be harmful to human health cause harm. [0003] Formaldehyde, chemical formula HCHO or CH 2 O, formula weight 30.03, also known as formaldehyde. A colorless gas with a special pungent smell, which is irritating to human eyes and nose. The relative density of gas is 1.067 (air=1), and the density of liquid is 0.815g / cm³ (-20°C). Melting point -92°C, boiling point -19.5°C. Soluble in water and ethanol. The concentration of the aqueous solution can reach up to 55%, usually 40%. It is called formaldehyde water, com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
CPCG01N21/783G01N2021/775
Inventor 朱佳琪朱项妤朱昊天朱巧芬
Owner 朱佳琪
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