Method for detecting oxymethylene purifying effect in indoor air by nanometer titanium dioxide material
A technology of nano-titanium dioxide and detection method, applied in the field of air purification, can solve the problems of unreachable and unsatisfactory purification effect, and achieve the effect of good reproducibility
Inactive Publication Date: 2012-07-25
北京绿伞科技股份有限公司
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Problems solved by technology
Nano titanium dioxide (TiO 2 ) The formaldehyde degradation rate detected by the product is very high, but the purification effect is not satisfactory when it is actually used in the room, and the formaldehyde concentration cannot reach ≤0.10mg / m 3 national standard
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[0024] The invention discloses a method for detecting the effect of purifying formaldehyde in indoor air by a nano-titanium dioxide material.
[0025] The steps of the detection method include:
[0026] A. Preparation of formaldehyde release source: Add formaldehyde solution into a container, then use pure cotton fabric to make a fine twist and put it into the container for soaking. After the fine twist is completely wet, it can be used as a formaldehyde release source; the soaking time is 50 seconds to 80 seconds, preferably 60 seconds; the diameter of the fine twist is 3-7 mm, preferably 5 mm; the pure cotton fabric is medical gauze.
[0027] The concentration of the formaldehyde solution is 2‰, and the purity is AR (analytical reagent, analytically pure), and the concentration is 37% formaldehyde original solution. The way to adjust the fine twist is: adjust its thickness, tightness, Twist how much of the bottle mouth is exposed; the pure cotton fabric can be medical gauze...
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Abstract
The invention relates to the field of air purification, and aims to provide a method for detecting the effect of purifying formaldehyde in room air by using nanometer titanium dioxide (TiO2) material. The method is to simulate the formaldehyde concentration in an actual room and comprises the following steps: preparing a formaldehyde release source, preparing a test swatch, and sampling and detecting in an air tank. The detection method can simulate the actual situation in the room, can provide users with a relatively scientific and reasonable testing data, and can meet the needs of real life. In the method, the formaldehyde is released in accordance with a linear rule and has good reproducibility; and the concentration of the release source is equivalent to the pollution concentration of the actual room, thus the practical application effect of an air purifying preparation can be objectively evaluated so as to provide an objective and real detection means for the purification effect.
Description
technical field [0001] The invention relates to the field of air purification, in particular to a method for detecting the effect of nano-titanium dioxide material on purifying formaldehyde in indoor air. The steps of the method include: preparation of a formaldehyde release source, preparation of a test sample, and sampling detection in an air chamber. Background technique [0002] The improvement of modern living standards has led to the popularization of interior decoration, but what follows is that the decoration materials have brought indoor air quality pollution. According to the statistics of the test results of the testing agency, the formaldehyde content in household pollution is generally 0.15mg / m 3 ~0.3mg / m 3 , up to 0.81mg / m 3 , 50%-200% higher than the national standard, with an average of 0.2mg / m 3 [0003] nano titanium dioxide (TiO 2 ) materials are used to purify indoor air, especially the decomposition of formaldehyde has a broad market, but the countr...
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IPC IPC(8): G01N33/00
Inventor陶艳张辉廉聪良
Owner北京绿伞科技股份有限公司