Figure 2From: A randomized double blind crossover placebo-controlled clinical trial to assess the effects of a mouthwash containing chlorine dioxide on oral malodor Changes in concentration of H2S. Comparison of mean H2S, hydrogen sulfide; Olfactory threshold levels, H2S > 1.5 ng/10 ml values between rinsing with ClO2 (n = 15) and rinsing without ClO2 (n = 15) by Student's t-test. *, p < 0.05; **, p < 0.01.Back to article page