Determination of 2-Propenal Using Headspace Solid-Phase Microextraction Coupled to Gas Chromatography–Time-of-Flight Mass Spectrometry as a Marker for Authentication of Unrefined Sesame Oil

Figure 2

Comparison of DVB/CAR/PDMS and CAR/PDMS fibers on the extraction efficiencies of 2-propenal from corn (a) and soybean (b) oils at different temperatures (25–100°C). Different letters indicate the significant differences at < 0.05.

(a)

(b)