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

Table 1

Experimental factors and their coded and actual values used for HS-SPME optimization using response surface methodology.

Factor	Symbol	Coded levels
			0	+1
Extraction temperature (°C)		25	40	55
Equilibrium time (min)		15	30	45
Extraction time (min)		5	10	15