Altogether 24 volatile organic compounds were detected and
quantified. Eight odorants suggested to be most likely to contribute
to odour impacts are listed in Table 3. Methyl mercaptan (MM),
DMDS, 2,3-butanedione, phenol and m-cresol were measured at
higher concentrations than the odour detection threshold
(Schiffman et al., 2001). MM has a rotten cabbage smell and was
produced at higher levels (P < 0.05) from T1 group. DMDS was also
detected in chamber air from both diets. DMDS is the oxidation
product of MM. The results suggest that the use of 60 g/kg canola