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A detection method and formaldehyde content technology, applied in the field of formaldehyde content detection, can solve the problems of different detection results, inaccurate detection, expensive instruments, etc., and achieve the effect of accurate detection results, improved accuracy, and small human factors
Inactive Publication Date: 2022-05-27
苏州科建建设工程质量检测有限公司
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[0004] Based on this, the purpose of this invention is to provide a kind of formaldehyde content detection method, to solve the existing method of mensuration formaldehyde content is varied, has phenol reagent method, gas chromatography, electrochemical sensor method, but wherein phenol reagent method is last The results need to be compared with the test paper, re
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[0028] Example 1
[0029] A formaldehyde content detection method, firstly, the doors and windows of the house to be tested are closed to keep the whole house in a sealed state, and the sealed state is 12-15H. In places with high humidity, lime blocks are used to absorb it, and in places with low humidity, it is humidified by atomization and spraying. The indoor temperature is controlled at 19-25 °C. , after the temperature and humidity measurement is qualified, start the formaldehyde detection, place the phenolic reagent 3-methylbenzazolamine hydrochloride reagent in the position that needs to be detected in the whole house, after a period of time, it will react with the formaldehyde in the air to a certain extent , the reagent is discolored, the formaldehyde concentration is different in different positions, and the color of the reagent is different. Multiple detection reagents are bottled and placed in the spectrophotometer for measurement. The change of the reflected light...
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Abstract
The invention discloses a formaldehyde content detection method, and relates to the field of formaldehyde detection.The method comprises the steps that 1, doors and windows of a detected house are closed, the whole house is kept in a sealed state, and the sealed state is kept for a period of time; 2, detecting the temperature and humidity of the whole house in the sealed house; 3, the humidity of the whole house is adjusted, and the temperature is adjusted; 4, after the temperature and humidity are determined to be qualified, detection is started, the stock solution and water are mixed according to a certain ratio to prepare a reagent, and the reagent is placed at the position, needing to be detected, of the whole house. The temperature and humidity of the to-be-detected place are comprehensively adjusted before detection, the influence of the temperature and humidity on formaldehyde detection is reduced, the temperature and humidity of the whole house are adjusted to be consistent, the adjusted temperature and humidity are suitable for formaldehyde detection, and therefore the formaldehyde detection accuracy is improved; the problem that low-concentration formaldehyde cannot be detected is solved by sealing for 12 hours and heating.
Description
technical field [0001] The invention relates to the field of formaldehyde detection, in particular to a formaldehyde content detection method. Background technique [0002] Formaldehyde is an organic chemical substance, also known as formaldehyde. It is a colorless and irritating gas, which is irritating to human eyes and nose. The gas relative density is 1.067, the liquid density is 0.815g / cm3, the melting point is -92°C, and the boiling point is -19.5 ℃, easily soluble in water and ethanol, the concentration of the aqueous solution can reach up to 55%, generally 35%-40%, usually 37%, called formalin, commonly known as formalin, formaldehyde detection refers to a specific method Or instrument to quantitatively detect formaldehyde contained in air, water, food, clothing, board, leather, etc., white or non-iron clothes, especially some jeans, 100% wrinkle-proof and shrink-proof clothes or cotton-free clothes Ironing shirts use glyoxal resin, which contains formaldehyde. [...
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