AEDA. The GCO system consisted of a Varian 3300 GC
(Varian Instrument Group, Walnut Creek, CA) equipped with
a flame ionization detector and a sniffing port. Each extract
was serially diluted (1:3) using dichloromethane as diluent.
One microliter was injected into a DB-5ms column (30 m
length 0.32 mm i.d. 0.25 ím film thickness; J&W
Scientific). GC conditions were the same as for GC-MS except
that the oven temperature was programmed from 40 to 200
°C at a rate of 6 °C/min with initial and final hold times of 5
and 30 min, respectively. GCO was performed by two expert
panelists familiar with the aroma of beeflike process flavor.
FD factors were obtained by averaging FD factors determined
by panelists and expressed as average log3 FD. Standard
deviations of the FD factors were 0 and 0.72 for most of the
aroma-active compounds