Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Reagent and method for rapidly detecting formaldehyde in foods

A technology for detection reagents and test strips, which is used in material analysis by observing the influence of chemical indicators, and analysis by chemical reaction of materials, etc. problem, to achieve the effect of fast fading response, guaranteed accuracy, guaranteed accuracy and sensitivity

Inactive Publication Date: 2014-03-05
广东中测食品化妆品安全评价中心有限公司
View PDF3 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are many methods for the determination of formaldehyde, such as spectrophotometry, gas chromatography, liquid chromatography, polarography, etc., but these methods have certain limitations, such as spectrophotometry, although it has the advantages of easy operation and easy promotion. , but poor specificity and poor sensitivity; chromatography has high selectivity and sensitivity, but complicated sample handling and long test time
In short, the above methods cannot satisfy the on-site rapid detection of formaldehyde in food.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A rapid detection reagent for formaldehyde in food is characterized in that it comprises phloroglucinol solution, sodium hydroxide solution and formaldehyde standard solution.

[0026] The concentration of the phloroglucinol solution is 0.005mol / L, and the volume is 8ml.

[0027] The concentration of described sodium hydroxide solution is 2mol / L, and volume is 5ml.

[0028] The concentration of the formaldehyde standard solution is 10ug / ml, and the volume is 2ml.

[0029] Utilize the method for above-mentioned reagent detection formaldehyde in food, comprise the following steps:

[0030] (1) Pretreat the sample by protein precipitation method to prepare the sample solution to be tested. The protein precipitation method is as follows: first weigh 2g of sample, mix it with purified water at a ratio of 1:1, and stir it with a mixer to make it Homogenize, put in a beaker, add 20ml of purified water, adjust the pH of the solution to 5-9, add 5ml of zinc sulfate reagent, sh...

Embodiment 2

[0034] A rapid detection reagent for formaldehyde in food is characterized in that it comprises phloroglucinol solution, sodium hydroxide solution and formaldehyde standard solution.

[0035] The concentration of the phloroglucinol solution is 0.01mol / L, and the volume is 15ml.

[0036] The concentration of described sodium hydroxide solution is 5 mol / L, and volume is 10ml.

[0037] The concentration of the formaldehyde standard solution is 20ug / ml, and the volume is 5ml.

[0038] Utilize the method for above-mentioned reagent detection formaldehyde in food, comprise the following steps:

[0039] (1) The sample is pretreated by the protein precipitation method to obtain the sample solution to be tested. The protein precipitation method is as follows: first weigh 5g of the sample, mix it with purified water at a ratio of 1:1, and stir it with a mixer to make it Homogenize, put in a beaker, add 50ml of purified water, adjust the pH of the solution to 5-9, add 10ml of zinc sulf...

Embodiment 3

[0043] A rapid detection reagent for formaldehyde in food is characterized in that it comprises phloroglucinol solution, sodium hydroxide solution and formaldehyde standard solution.

[0044] The concentration of the phloroglucinol solution is 0.008mol / L, and the volume is 12ml.

[0045] The concentration of described sodium hydroxide solution is 3.5 mol / L, and volume is 8ml.

[0046] The concentration of the described formaldehyde standard solution is 15ug / ml, and the volume is 3.5ml.

[0047] Utilize the method for above-mentioned reagent detection formaldehyde in food, comprise the following steps:

[0048] (1) The sample is pretreated by the protein precipitation method to obtain the sample solution to be tested. The protein precipitation method is as follows: First, weigh 3.5g of the sample, mix it with purified water at a ratio of 1:1, and use a mixer to make a uniform preparation. Make a homogeneous slurry, put it into a beaker, add 35ml of purified water, adjust the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Concentrationaaaaaaaaaa
Volumeaaaaaaaaaa
Concentrationaaaaaaaaaa
Login to View More

Abstract

The invention relates to a reagent and a method for rapidly detecting formaldehyde in foods. The reagent comprises a phloroglucinol solution, a sodium hydroxide solution and a formaldehyde standard solution. The detection method comprises the following steps: pretreating a sample, and preparing a sample solution to be detected; taking three colorimetric tubes, respectively adding the sample solution to be detected into one colorimetric tube, adding the formaldehyde standard solution into another colorimetric tube, and taking the rest colorimetric tube as a blank control group; adding the sodium hydroxide solution into the three colorimetric tubes, and adding the phloroglucinol solution into the three colorimetric tubes; finally, dripping the three solutions onto test paper, observing color changes of the three solutions on the test paper, comparing the color change of the sample solution to be detected with a color card, and performing qualitative and quantitative analysis on formaldehyde in the sample to be detected. The detection method is easy to operate, special equipment and instruments are not needed, the detection result is reliable, and the method has high sensitivity and is particularly suitable for rapid detection of the formaldehyde in the foods.

Description

technical field [0001] The invention belongs to the field of food safety detection, and in particular relates to a rapid detection reagent and detection method for formaldehyde in food. Background technique [0002] Formaldehyde is a toxic substance that can directly act on amino groups, sulfhydryl groups, hydroxyl groups and carboxyl groups to generate methine derivatives, thereby destroying body proteins and enzymes, causing irreversible coagulation and necrosis of tissue cells, and taking a small amount of formaldehyde can prevent stomach cancer. The digestion of enzymes and pancreatic enzymes affects metabolic functions, and can cause serious damage to important organs and systems such as the nervous system, liver, and lungs. The World Health Organization has identified it as a carcinogenic and teratogenic substance and a recognized Allergens. Formaldehyde is a protoplasmic poison with high toxicity. It ranks second on the list of toxic chemicals in my country. influenc...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01N21/78
Inventor 郭狄
Owner 广东中测食品化妆品安全评价中心有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com