The fibre was
then injected into a Gas Chromatograph (GC 6890, Agilent)
equipped with a DB1 column and a Flame Ionization Detector
( splitle mode; injector T ¼ 280 C; T1 ¼ 40 C for 5 min; ramp
5 C/min to 240 C; final T ¼ 240 C for 10 min; detector
T ¼ 300 C)