Hence, a two-stage analysis seems to be the optimal solution. In the first
stage, one of the static head-space analysis methods with passive adsorption
and thermodesorption (e.g. SPME) should be used. If the results enable
accelerant identification, the analysis will be terminated. If the results indicate
the presence of substances with high boiling points, the sample should
be subjected to liquid extraction, and after concentration, the extract should
be analysed.