Method for measuring volatile substance release in interior wall coating

A technology for interior wall coatings and a measurement method, which is applied to the measurement of the release of volatile harmful substances in interior wall coatings, and the measurement of the release concentration of volatile organic compounds and formaldehyde in interior wall coatings, can solve problems such as damage to indoor air quality, etc. Achieving the effect of convenient indoor air pollution situation

Inactive Publication Date: 2010-09-15
NANCHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

More importantly, the release of volatile substances in paint has certain stages and regularity, and the release of harmful substances must go through a release process. The release concentration in this process is the real reason for damaging the quality of indoor air. Therefore, the content of free formaldehyde or the total content of volatile organic compounds per kilogram of paint is used to judge whether the paint is safe for human health in use, and there are serious deficiencies.

Method used

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  • Method for measuring volatile substance release in interior wall coating
  • Method for measuring volatile substance release in interior wall coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The interior of the environmental test chamber is cleaned with an alkaline cleaner, and room air is fed into the chamber for 24 hours. The background concentration of VOCs in the cabin is 0.032~0.038mg / m 3 , Inside the cabin in the paint test: (23±1)°C, relative humidity RH is (45±5)%, air exchange frequency is 1 time / h, and the area painted by the paint in each cubic meter of space is 1m 2 / m 3 .

[0018] Select inert flat glass as the substrate material for paint painting, and measure interior wall paint sample 1 according to the instructions on the amount of paint used in the interior wall paint (wherein the total amount of volatile organic compounds VOC is 183.72g L -1 ), evenly coated on both sides in two times, and immediately placed in the environmental test chamber, using thermal desorption gas chromatography to track and monitor the VOCs release characteristics of interior wall coatings. The determination method is to load an appropriate amount of adsorbent ...

Embodiment 2

[0020] The interior of the environmental test chamber is cleaned with an alkaline cleaner, and room air is fed into the chamber for 24 hours. The background concentration of formaldehyde in the cabin is 0.029~0.033mg / m 3 , Inside the cabin in the paint test: (23±1)°C, relative humidity RH is (45±5)%, air exchange frequency is 1 time / h, and the area painted by the paint in each cubic meter of space is 1m 2 / m 3 .

[0021] Select inert flat glass as the substrate material for paint painting, and measure interior wall paint sample 2 according to the instructions on the amount of paint used in the interior wall paint (the total content of free formaldehyde is 0.021g kg -1 ), spread it evenly on both sides in two times, and immediately put it in the environmental test chamber, and use the phenol reagent method to measure the formaldehyde release concentration in the sample air. It is oxidized by ferric ions in acidic solution to form a blue-green compound. According to the depth...

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Abstract

The invention discloses a method for measuring volatile substance release in an interior wall coating, which comprises the following steps of: brushing the coating on two surfaces of a smooth inert substrate material twice according to the explanation of the using amount of the interior wall coating, immediately placing the material in an environmental test chamber with adjustable temperature, humidity and ventilation frequency, periodically extracting an air sample in the environmental test chamber according to the release rule of a volatile harmful substance, tracing and monitoring the release concentration of the volatile harmful substance in the sample, and making a release concentration-time curve to determine the release peak concentration and release steady-state concentration of the volatile harmful substance in the sample. The release concentration of a volatile organic compound (VOC) is detected by using gas chromatography, and the release concentration of formaldehyde is detected according to a phenol reagent method.

Description

technical field [0001] The invention relates to a method for measuring the release of volatile harmful substances in interior wall coatings, in particular to the measurement of the release concentrations of volatile organic compounds and formaldehyde in interior wall coatings, and belongs to the technical field of testing. Background technique [0002] Interior wall paint is one of the building decoration and decoration materials used in a large amount in indoor space, and it is also one of the materials with the greatest hidden danger of indoor environmental pollution. The release process of volatile harmful substances in interior wall coatings directly affects indoor air quality, so the release measurement of volatile substances in interior wall coatings is very important in the study of indoor air pollution. [0003] At present, the determination of volatile substances in interior wall coatings is mainly carried out according to the provisions of "GB 18582-2001 Standard f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N21/31
Inventor 于韵
Owner NANCHANG UNIV
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