Generation of test gases from volatile and semivolatile organic compounds (VOC/SVOC)

An apparatus for the continuous generation of test gases from organic compo unds of the VOC (Volatile Organic Compounds) and SVOC (Semivolatile Organic Compounds) categories has been developed. The use of a new test gas genera tor together with a system of heated transfer lines enabled the dynamic gen eration of test gases also of components with relatively low vapour pressur es. With the help of an on-line coupled gas chromatograph the actual test g as concentrations were monitored. The apparatus has been evaluated for the compounds n-decane and pyrene.