FLUORCARBONSPORSTOFFER OG FREMGANGSMAADE TIL SPORING

摘要

A material is traced to its origin or the flow pattern of a fluid medium is defined by incorporating into the material or fluid medium a perfluorinated C9-C18 polycyclic hydrocarbon containing at least two bridgehead carbon atoms linked through a bridge containing at least one carbon atom, collecting a sample of the material or fluid medium after distribution or flow, and analyzing the sample for the presence of the perfluoro compound.