Rapid detecting method for detecting formaldehyde doped in flash milk

A detection method and formaldehyde technology are applied in the field of rapid detection of formaldehyde mixed in raw milk, which can solve the problems of unguaranteed raw milk quality, inconspicuous color development, difficult safe operation, etc., and achieves low cost, fast color reaction, Measuring the effect of relaxed conditions

Active Publication Date: 2009-07-08
INNER MONGOLIA MENGNIU DAIRY IND (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are several corresponding detection methods for the rapid detection of formaldehyde in raw milk, such as acetylacetone method, HNO 3 and H 2 SO 4 method, FeCl 3 method, FeCl 3 and Concentrated H 2 SO 4 method, color-changing acid method, and iron-phenanthroline color method, but the quality of raw milk cannot be guaranteed due to the disadvantages of unsafe operation, inconspicuous color phenomenon or low sensitivity.
In addition, there are also rapid detection boxes specially used to detect formaldehyde in raw milk on the market, but the price is relatively expensive.

Method used

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  • Rapid detecting method for detecting formaldehyde doped in flash milk
  • Rapid detecting method for detecting formaldehyde doped in flash milk
  • Rapid detecting method for detecting formaldehyde doped in flash milk

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] First weigh 12g of sodium hydroxide and dissolve it in 100mL of water to form a 12% sodium hydroxide solution; then weigh 1g of phloroglucinol and dissolve it in 100mL of 12% sodium hydroxide (NaOH) solution.

[0041] Add 3ml of raw milk sample directly into the test tube, then add 0.5ml of the above-mentioned mixed reagent, do not shake, and observe the color reaction at the bottom of the test tube visually within 1min.

[0042] It is best to make a blank test tube when testing, which will be conducive to comparative observation.

[0043] The test results are as follows:

[0044]

Embodiment 2

[0046] First weigh 14g sodium hydroxide and dissolve it in 100mL water to form a 14% sodium hydroxide solution; then weigh 0.5g phloroglucinol and dissolve it in 100mL 14% sodium hydroxide (NaOH) solution.

[0047] Add 8ml of raw milk sample directly to the test tube, then add 0.5ml of the above-mentioned mixed reagent, do not shake, and observe the color reaction at the bottom of the test tube visually within 1min.

[0048] It is best to make a blank test tube when testing, which will be conducive to comparative observation.

[0049] The test results are as follows:

[0050]

[0051]

Embodiment 3

[0053] First weigh 10g of sodium hydroxide and dissolve it in 100mL of water to form a 14% sodium hydroxide solution; then weigh 1.5g of phloroglucinol and dissolve it in 100mL of 10% sodium hydroxide (NaOH) solution.

[0054] Directly add 2ml of raw milk sample into the test tube, then add 0.5ml of the above-mentioned mixed reagent, do not shake, and observe the color reaction at the bottom of the test tube visually within 1min.

[0055] It is best to make a blank test tube when testing, which will be conducive to comparative observation.

[0056] The test results are as follows:

[0057]

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Abstract

The invention relates to a detection method, in particular to a rapid detection method for formaldehyde mixed in raw milk. The invention belongs to the technical field of chemical component detection. A rapid detection method for formaldehyde in raw milk of the present invention, wherein, the weight ratio of A reagent, V reagent and water is: (10-14): (0.5-1.5): 100, the weight ratio of raw milk and mixed reagent It is (4-8): 1; wait for a period of time, and judge whether there is formaldehyde qualitatively according to the color reaction. The method only needs to prepare a mixed reagent, only one-step reagent addition operation, fast color reaction, only about 1 minute, relatively loose measurement conditions; and high sensitivity, low cost.

Description

technical field [0001] The invention relates to a detection method, in particular to a rapid detection method for formaldehyde mixed in raw milk. The invention belongs to the technical field of chemical component detection. Background technique [0002] At present in our country, the phenomenon of raw milk adulteration has been repeatedly banned, and it is becoming more and more serious and common. Because formaldehyde has anti-corrosion and disinfection effects, driven by profit, some dairy farmers add formaldehyde to raw milk to achieve the microbial index when receiving milk. No one knows that formaldehyde is a highly toxic substance. Formaldehyde is on the priority control list of toxic chemicals in my country. Ranked second. Formaldehyde has been determined by the World Health Organization as a carcinogenic and teratogenic substance. It is a recognized source of allergies and one of the potential strong mutagens. It can destroy biological cell proteins and cause human ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/78
Inventor 常建军
Owner INNER MONGOLIA MENGNIU DAIRY IND (GRP) CO LTD
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