The STOD, a differential olfactometer (stimulateur olfactometre differ
entiel) was used to measure overall food odour intensity. This instrum
ent, based on reciprocal inhibition, measures qualitative differences
between an odour to be evaluated and standard butanol. The odour inten
sity of different roasted cocoa beans and chocolates could be measured
by the STOD. The comparison of the odour intensify of differently roa
sted cocoa beans and the odour intensify of differently conched chocol
ates (traditionally or extrusion processed) was studied. Copyright (C)
1996 Elsevier Science Ltd.