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Method for determining formaldehyde content in air

A technology of formaldehyde content and determination method, which is applied in chemical analysis by titration method, measurement of color/spectral characteristics, analysis through chemical reaction of materials, etc. It can solve the problems of low accuracy, limited scope of use, complex enzyme system, etc. problems, to achieve the effect of simple operation, high sensitivity and good selectivity

Inactive Publication Date: 2017-12-29
贵州金洋检测工程有限公司
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  • Abstract
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Problems solved by technology

The enzymes selected in these methods are complex, have a certain detection cost, and the calculation process is relatively confidential, which limits the scope of use
And its accuracy is low, which belongs to qualitative measurement and limits the place of determination

Method used

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  • Method for determining formaldehyde content in air
  • Method for determining formaldehyde content in air
  • Method for determining formaldehyde content in air

Examples

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Embodiment Construction

[0031] Specific embodiments of the present invention will be further described below. It should be noted here that the descriptions of these embodiments are used to help understand the present invention, but are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not constitute a conflict with each other.

[0032] The method for measuring formaldehyde content in the air of the present invention, its principle is to utilize formaldehyde of different concentrations to react with phenol reagent to generate oxazine, adopt phenol reagent colorimetric method to draw standard curve, then in the presence of ferric ammonium sulfate ferric ion, oxazine is in the acidic solution It is oxidized by ferric ions to form a blue-green compound. According to the depth of the color, the formaldehyde content in the air can be obtained by colo...

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Abstract

The invention discloses a method for determining the formaldehyde content in air. The method comprises the steps of reacting by virtue of formaldehyde of different concentrations with a phenol reagent so as to generate piperazine, drawing a standard curve by virtue of a phenol reagent colorimetric method, then in the presence of ferric ion of ammonium ferric sulfate, oxidizing piperazine with the ferric ion in an acidic solution to form a blue-green compound, and according to color shade, carrying out colorimetric determination so as to obtain the formaldehyde content in air. The method for determining the formaldehyde content in air has high determination sensitivity to formaldehyde and good selectivity and is simple and convenient in operation.

Description

technical field [0001] The invention relates to the field of indoor toxic and harmful gas detection, in particular to a method for measuring formaldehyde content in air. Background technique [0002] Formaldehyde is a protoplasmic poison. After people inhale high-concentration formaldehyde, severe irritation and edema of the respiratory tract, eye stinging, headache, and bronchial asthma may occur. Direct skin contact with formaldehyde can cause dermatitis, stains, and necrosis. Frequent inhalation of a small amount of formaldehyde can cause symptoms such as headache, fatigue, insomnia, and autonomic disorders. Can cause chronic poisoning, mucosal congestion, skin irritation, allergic dermatitis and other diseases. Long-term inhalation by pregnant women may lead to deformities and even death of newborn babies. Long-term inhalation by men may lead to sperm deformity, death, decreased sexual function, and serious loss of reproductive ability. Formaldehyde has become the mai...

Claims

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Application Information

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IPC IPC(8): G01N21/78G01N21/31G01N31/16
CPCG01N21/78G01N21/31G01N31/16
Inventor 黄曦
Owner 贵州金洋检测工程有限公司
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