01/01/2021
Chromatogram of the test gas mixture analysed after direct injection into the split/splitless injector

Chromatogram of the test gas mixture analysed after direct injection into the split/splitless injector

Source: BAM, division Materials and Air Pollutants

In the indoor environment, residents are exposed to a large number of various chemical pollutants originating from both the ingress from the outside and emissions from permanent sources indoors like building materials, furniture, electronic devices or non-permanent sources like household chemicals, etc. Most of them are organic compounds, which are classified into very volatile, volatile and semi-volatile organic compounds (VVOC, VOC, SVOC). In the last decades, many studies have shown that these substances are responsible for health complaints often referred to as the Sick Building Syndrome (SBS). In particular, the reliable quantification of very volatile organic compounds (VVOC) in indoor air by use of thermal desorption gas chromatography (TD-GC) in order to include them into evaluation schemes for building products even nowadays is a great challenge. For capturing these small molecules with carbon numbers ranging from C1-C6, strong adsorbents are needed. In the present study, recovery rates of nine suitable adsorbents of the groups of porous polymers, graphitised carbon blacks (GCB) and carbon molecular sieves (CMS) are tested against a complex test gas standard containing 29 VVOC. The results reveal a better performance of the adsorbents in combination than being used alone, particularly under humid sampling conditions.

Determination of recovery rates of adsorbents for sampling very volatile organic compounds (C1-C6) in dry and humid air in the sub-ppb range by use of thermal desorption gas chromatography-mass spectrometry
Matthias Richter, Elevtheria Juritsch, Oliver Jann
published in Journal of Chromatography A, Band 1626, Seite 461389
BAM division Materials and Air Pollutants