Analysis of volatiles. A sampling tube was inserted into a thermal desorption injector (set at 320 °) of a GC/MS and, as the trap heated up in the flow of He, the volatiles
were desorbed and passed directly on to the GC capillary column (25 mx0.22mm i.d.x0.25 #m BPX5, SGE) where they were concd by means of a liquid CO2 cryogenic cold trap; the GC oven temp.