The injector glass liner (12 cm 2 mm i.d.) was prepared in the
laboratory (Fankhauser-Noti & Grob, 2006). About 2 mg plug of
fused silica wool was positioned in the centre and kept in place by
a 0.3mm steel wire. The glass liner was deactivated by rinsing with
1% OV-1701 in dichloromethane, heating out at 350 C in the
injector and washing with dichloromethane to remove the excess
of OV-1701.