Fig. 1
From: Measurement of 8-hydroxyguanine as an oxidative stress biomarker in saliva by HPLC-ECD
a HPLC-1 chromatograms of the 8-OHGua standard and a human saliva sample. b HPLC-2 chromatogram of the 8-OHGua fraction of human saliva obtained by HPLC-1