Figure 1

Headspace analysis showing the total ion chromatogram (A) and extracted ion chromatograms of four bacteria specific compounds (B - E): m/z 85.0630 (A. actinomycetemcomitans specific), m/z 92.0486 (T. forsythia specific), m/z 120.0641 (T. denticola specific) and m/z 132.0995 (P. gingivalis specific).