A large amount of artificial boards are often used in modern building and home decoration, but they often contain formaldehyde, which can cause serious harm to people's health. The release of free formaldehyde is one of the important items for detecting artificial boards, and there are various detection methods. The specific methods are as follows:

1 Perforation extraction method

The perforation extraction method was developed early and is still widely used today. Its purpose is to completely separate free formaldehyde from the board.

2 Dryer method

The dryer method refers to placing crystals containing a specified volume of distilled water at the bottom of a dryer, and placing the test piece on a metal bracket fixed above it. The formaldehyde released by the test piece is absorbed by the distilled water, and this absorption solution is the sample solution. The solubility result is determined to be the formaldehyde release amount of the tested artificial board.

3 Climate Box Method

The climate chamber method is a relatively stable detection method, which has been modified under the new national standard GB18580-20171m ³ climate chamberlawTest method, change to reference. The principle of this method is to apply 1m²The surface area sample is placed in a climate chamber with temperature, relative humidity, air flow rate, and air displacement rate controlled under specified conditions. Volatile organic compounds (formaldehyde) are released from the sample and mixed with the air inside the box. The air inside the box is collected, and the formaldehyde concentration in the air is tested to calculate the formaldehyde release rate of the sample.

Under GB18580-2017, the perforation extraction method and dryer method are mentioned, but the (9-11) L dryer method and perforation extraction method are only used for production quality control, and the detected formaldehyde emission cannot be used as the final result. To evaluate the formaldehyde emission of artificial boards, it is necessary to use1m ³ climate chamberlaw.