What properties are required to test volatile organic compounds (VOC) in furniture with a VOC climate chamber?

For the detection of volatile organic compounds in furniture, VOC climate chambers and VOC environmental climate chambers are generally used. What performance is required for this voc climate chamber test? Let's take a look.

1. The composition of the voc climate chamber of the huanyi instrument:

The voc climate chamber consists of a cabin, an air circulation device, an air exchange device, an air purification device, a temperature and relative humidity control device, and a monitoring device. Test equipment with controlled operating parameters for simulating environments in which volatile organic compounds are released from furniture.

2. Airtightness:

In order to avoid the exchange with the outside air, all joint parts (except the injection site) should be sealed, and the climate chamber should be operated with a positive pressure of 10 Pa~20 Pa.

The climate chamber shall meet one of the following sealing requirements:

a) At 1 kPa positive pressure (gauge pressure), the air leakage rate in the cabin is VL≤0.5%*cabin capacity/min;

b) The air leakage rate in the cabin is VL≤5%*air supply rate V.

3. Background concentration:

The VOC climate chamber of the huanyi instrument has the function of supplying clean air. When the climate chamber is running with no load, the content of related substances in the air measured at the sampling port is required: the content of formaldehyde should not exceed 0.006 mg/m, and the content of TVOC should not exceed 0.05 mg/m , the content of each monomer (mainly benzene, toluene, xylene) should not exceed 0.005 mg/m.

Note: In the VOC climate chamber for the specified test substance, only the corresponding background concentration requirements are made for the tested substance.

4. Other requirements:

There should be no condensation on the inner wall of the cabin. When the temperature is (23±2)°C and the relative humidity is (45±5)%, the adsorption rate of the VOC climate chamber should be less than 20%.