Fig. 2From: Use of headspace–gas chromatography–ion mobility spectrometry to detect volatile fingerprints of palm fibre oil and sludge palm oil in samples of crude palm oilGallery plot of seven suggested PFO markers in all of the DT control samples. Peaks 4, 5, 6 and 7 were detected in 1% PFO + lab-pressed CPO, whilst all seven were detected in 10% PFO + lab-pressed CPOBack to article page