Table 3

Effect of activated charcoal and zinc acetate on the concentration of sulphur containing gases and odour intensity of flatus passages

Odour intensity
TreatmentH2S (nmol/l)MES (nmol/l)DMS (nmol/l)Judge 1Judge 2
None1365 (566445 (111)80.1 (13.5)4.1 (0.7)6.5 (0.5)
Activated charcoal4.5 (1.8)1.8 (0.5)0.9 (0.5)0.1 (0.1)0.4 (0.1)
p = 0.03p = 0.001p > 0.001p > 0.001p = 0.001
None526 (144)189 (38.2)29.3 (3.6)2.5 (0.5)5.8 (0.5)
Zinc acetate17.1 (4.9)16.7 (4.1)18.5 (3.15)0.7 (0.2)3.4 (0.6)
p = 0.01p > 0.001p = 0.04p = 0.004p = 0.007
  • Data were analysed using analysis of variance (ANOVA) and are expressed as mean (SEM). N = 9 and 16 flatus passages for charcoal treatment and zinc acetate respectively.

  • Odour intensity was rated on a linear scale ranging from 0 (no odour) to 8 (very offensive).

  • MES, methanethiol; DMS, dimethyl sulphide.