In-Situ Analysis of Essential Fragrant Oils Using a Portable Mass Spectrometer

Table 1

Limit of detection and rise and fall times for the fragrant compounds analyzed.

Compound	Vapor Pressure	Exposure	Ions	LOD	Rise	Fall
	(mm Hg at 25°C)	Time (s)	Monitored (m/z)	(ppb)	Time (s)	Time (s)
2-methyl-3-furanthiol	5.78	60	114	8.38	31	46
Methyl butanoate	32	65	74	15.06	23	38
ethyl methyl sulfide	60	60	76	1.68	16	41
3-methylbutyl acetate	5.6	50	70	16.23	15	23

Limit of detection (LOD) was calculated as = 3.3(standard error/slope), taken from a calibration curve of five points in the range 250-1000 ppb with three repetitions for each point.