Work

Towards a multi-VOC emission reference material with temporally constant emission profile for QA/QC of materials emission testing procedures

Year: 2024

Type: article

Abstract: Emission reference materials (ERMs) are sought after to further control and improve indoor air quality. The impregnation of porous materials with volatile organic compounds (VOCs) is a promising approach to produce ERMs. Different VOCs were used to impregnate various porous materials (mainly zeolites, activated carbons and a metal organic framework). The influence of different methodological parameters and material properties were studied to optimize the impregnation procedure and to find the best material/VOC combination. The impregnation procedure remains quite irreproducible, nevertheless, very good ERM candidates were identified. Two materials (zeolite 4 and AC 1 impregnated with n -hexadecane) showed a very stable emission over 14 days (<10 % change). Another material (AC 1 impregnated with toluene) showed a declining emission profile but with a very good in-batch reproducibility and a storage stability of up to 12 months. • Porous materials impregnated with VOCs as emission reference materials. • Stable emission over 14 days with at least two materials and n -hexadecane. • Highly reproducible emission profile for activated carbon loaded with toluene.

Source: Chemosphere

DOI: 10.1016/j.chemosphere.2024.143437