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Air formaldehyde self-test box

A formaldehyde, self-testing technology, applied in the direction of material analysis by chemical reaction of materials and material analysis by observing the impact on chemical indicators, can solve the problems of strict operation requirements, high cost of gas chromatograph, low sensitivity and so on , to achieve the effect of stable color reaction, favorable for detection and high sensitivity

Active Publication Date: 2017-06-06
XIAMEN UNIV OF TECH
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Problems solved by technology

Among them, gas chromatography has the characteristics of good selectivity and small interference factors, but the gas chromatograph is expensive; AHMT spectrophotometry has strong anti-interference ability and high sensitivity, but the operation requirements are strict; Ethanol, etc. have no interference, easy to operate, good reproducibility, but low sensitivity; electrochemical sensor method is easy and fast to operate, but the price of formaldehyde sensor is generally more expensive

Method used

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  • Air formaldehyde self-test box

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Embodiment Construction

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] The invention discloses an air formaldehyde self-test box, which includes an absorbent, an acidifying agent, a diluent, a color developing agent and a color comparison card. The principle of the self-test box is to use formaldehyde in the air to react with 3-methyl-2-benzothiazolone hydrazone (referred to as phenol reagent) to form oxazine, which is oxidized by ferric ions in acidic solution to form a blue-green compound. The color depth is directly proportional to the content of formaldehyde, and after 30 minutes of color development time, it can be quantified by colorimetry. The principle is based on the national standard method "Phenol Reagent Spectrophotometric Method for the Determination of Formaldehyde in the Air of Public Places" (GB / T18204.26-2000).

[0020] The absorbent is selected from phenolic reagent. In order to...

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Abstract

The invention discloses an air formaldehyde self testing kit, including an absorbent, an acidifying agent, a diluent, a chromogenic agent and a colorimetric card. The absorbent is a phenol reagent, the acidifying agent is phosphorus pentoxide, the diluent is pure water, and the chromogenic agent is ammonium ferric sulfate. The self testing kit is suitable for household usage, and is economical, convenient, accurate and quick in detection of the indoor formaldehyde content.

Description

technical field [0001] The invention relates to the technical field of air formaldehyde detection, in particular to an air formaldehyde self-test box. Background technique [0002] Formaldehyde is a protoplasmic poison that destroys biological cell proteins. Under normal conditions, pure formaldehyde is a colorless gas with a suffocating smell, which can cause damage to human skin, respiratory tract and internal organs. The concentration in the air is closely related to the length of contact time. Formaldehyde also has teratogenic and carcinogenic effects. People who have been exposed to formaldehyde for a long time are more likely to suffer from nasal cavity, oral cavity, nasopharynx, throat, skin and digestive tract cancer than ordinary people. Human long-term exposure to low-level formaldehyde can cause chronic respiratory diseases and women's menstrual disorders , Pregnancy syndrome, causing newborns to reduce their physical fitness, chromosomal abnormalities, and even ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/78
Inventor 严滨廖文超程前许美兰叶茜林君成燕龙龙
Owner XIAMEN UNIV OF TECH
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