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- Emission testing (2) (entfernen)
Besides measurement of VOC emissions also the evaluation of odour emissions and the perceived intensity of odours gains in importance. Due to difficulties detected in the measurement method of the perceived intensity described in (ISO 16000-28, 2012) the introduction of “reference” odours will be recommended for the training of panellists and as basis for interlaboratory comparisons.
In order to generate the “reference” odours standard liquid substances were directly injected into the main gas flow provided to the panellists. One of the substances tested was ethyl acetate. A pre-evaluation was conducted with six untrained panellists and has shown that ethyl acetate is potentially suitable as reference odour. For further validation of those “reference” odours they additionally will be provided to and evaluated by trained panellists of well established-measurement institutes.
Emissions of building materials might have negative impact on human health and well-being. In the EU-funded research project H-House more than 30 natural materials (earthen dry boards and plasters, bio-based insulation materials made of wood, flax, reed, straw, etc.) used for renovation and refurbishment were tested regarding emissions of VOC, formaldehyde and radon. Different to ordinary emission tests on single materials this study focuses on the emissions from complete wall assemblies. Therefore, specially designed test chambers were used allowing the compounds to release only from the surface of the material facing indoors. The testing parameters were chosen in order to simulate model room conditions. The emission results were finally evaluated using the AgBB evaluation scheme, a procedure currently applied for the approval of flooring materials in Germany.