Fig. 3From: A comparison of semi-quantitative methods suitable for establishing volatile profilesEffect of sampling time on the identification of VOCs. Comparison of floral scent chromatograms of Petunia after 4 h (a, c) and 24 h (b, d) of sampling. c, d are close ups of chromatograms (a, b). Scales of a, b, and c, d are the same for comparisonBack to article page