How were emission tests done?
Emission testing was conducted by IRC/NRC in accordance with ASTM D 5116-90. The testing period ranged from 72 to 362 hours for dry materials and 78 to 440 hours for wet materials to capture the concentration decay portion properly. Therefore, the number of chamber air samples also varied from 6 to 22 for dry materials and from 16 to 40 for wet materials. Exceptions are associated with two OSB specimens whose tests lasted for 1 year to investigate long-term emission behaviors. For long-term tests, a total of 40 samples were taken for each test. The main chemical analysis method involves air sampling on multi-layered sorbent tubes and the thermal desorption/GC/MS (gas chromatography and mass spectrometry) analysis. The HPLC (high performance liquid chromatography) analysis in combination with DNPH (dinitrophenylhydrazine) cartridge sampling was added for carbonyls such as acetaldehyde, butanal, formaldehyde, hexanal, pentanal and acetone. However, DNPH cartridge samples were collected a
