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Method for measuring formaldehyde concentration in solid waste

A technology of solid waste and determination method, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., to achieve the effects of reducing pollution, good linearity, and increasing reaction temperature

Inactive Publication Date: 2018-08-31
江苏康达检测技术股份有限公司
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  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of assay method of formaldehyde concentration in solid waste, to solve the technical problem of clearly testing the linear range in the high performance liquid chromatography of existing determination solid waste formaldehyde content found

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  • Method for measuring formaldehyde concentration in solid waste
  • Method for measuring formaldehyde concentration in solid waste
  • Method for measuring formaldehyde concentration in solid waste

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[0028] In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention.

[0029] Exemplary embodiments of the present invention will be described below.

[0030] This exemplary embodiment discloses a method for determining the concentration of formaldehyde in solid waste. The principle of the reference method is: after the sample is extracted by the extract solution, under the buffer condition of an acetate buffer solution with pH=5, use 2,4 -Dinitrophenylhydrazine (DNPH) is derivatized to generate formaldehyde derivatives, which are extracted by solid phase or solvent, separated and detected by...

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Abstract

The invention relates to a method for measuring the formaldehyde concentration in provided solid waste. The method includes the following steps of: respectively drawing a low-concentration standard working curve according to the formaldehyde derivative standard solution with a mass concentration of 5ug / L-100ug / L, drawing a high-concentration standard working curve according to the formaldehyde derivative standard solution with a mass concentration of 0.5 mg / L-10 mg / L, and the linearity of the low-concentration standard working curve and the high-concentration standard working curve is good, the detected limit, precision and accuracy are all in accordance with the requirements of the method and is beneficial to carrying out multi-range sample testing; the concentration of derivatization reagent 2, 4-dinitrophenylhydrazine (DNPH) solution is reduced to 0.6mg / mL. 2, 4-dinitrophenylhydrazine (DNPH) solution belongs to the middle-toxic dangerous goods. The use amount of DNPH reagent is reduced. The experimental cost and the pollution are reduced; the derivatization reaction temperature is improved to 60 DEG C, which improves the reaction rate and make the derivatization reaction more complete. And the derivatization process is not affected.

Description

technical field [0001] The invention relates to the technical field of measuring harmful gas content in waste, in particular to a method for measuring formaldehyde concentration in solid waste. Background technique [0002] Formaldehyde is a protoplasmic poison. After people inhale high-concentration formaldehyde, severe irritation and edema of the respiratory tract, eye irritation, headache, and bronchial asthma may occur. Direct skin contact with formaldehyde can cause dermatitis, pigmentation, and necrosis. Frequent inhalation of a small amount of formaldehyde can cause symptoms such as headache, fatigue, insomnia, and autonomic disorders. It can also cause chronic poisoning, mucous membrane congestion, skin irritation, and allergic dermatitis, etc. . Formaldehyde has been positioned carcinogenic and teratogenic shape substance by the World Health Organization, is the allergen of generally acknowledging, also is one of potential strong mutagen. [0003] Existing high-pe...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06G01N30/14
CPCG01N30/02G01N30/06G01N30/14
Inventor 张峰李军高晨葛敏明
Owner 江苏康达检测技术股份有限公司
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