At the end
of the capillary column, the effluent was split into 1:1 for the MSD
and sniffing port, using deactivated and uncoated fused silica capillaries
as transfer lines, and the sniffing cone was purged with
humidified air to help maintaining olfactory sensitivity by reducing
dehydration of mucous membranes in the nasal cavity. The sniffing
port was held at 250 ◦C to prevent any condensation of volatile
compounds.