Table 2.

Influence of HS-SPME parameters (temperature extraction, equilibrium and extraction times) on the volatiles of Daucus crinitus Desf

	HS-SPME parameters
		Equilibrium time teq min			Extraction time text min		Extraction Temperature Text°C
		(Text = 70°C - text = 15 min)			(Text = 70°C - teq = 60 min)		(text = 30 min - teq = 60 min)
Class of compounds	20	40	60	80	30	45	30	50	70	90
Hydrocarbon compounds	37.6	58.8	53.8	49.1	69.3	52.3	85.9	76.3	69.3	62.0
Oxygenated compounds	56.8	37.8	44.8	47.6	30.1	38.1	11.3	22.5	30.1	36.1
Aliphatic compounds	74.6	69.3	78.4	72.2	80.2	67.2	74.8	79.3	80.2	76.1
Phenylpropanoid compounds	2.0	3.2	1.2	2.9	0.6	2.5	0.1	0.3	0.6	0.9
Hydrocarbon non-terpenic compounds	23.5	37.5	39.8	29.9	54.8	33.8	67.4	59.5	54.8	45.1
Hydrocarbon monoterpenes	11.9	17.2	13.1	17.6	6.7	12.1	19.3	12.6	6.7	4.1
Hydrocarbon sesquiterpenes	2.2	4.0	0.6	1.5	7.6	6.3	0.8	4.2	7.6	12.5
Hydrocarbon diterpenes	-	0.1	0.3	0.1	0.2	0.1	-	-	0.2	0.3
Oxygenated non-terpenic compounds	52.9	35.0	39.8	45.2	26.0	35.9	9.1	20.1	26.0	31.9
Oxygenated monoterpenes	3.8	2.8	4.9	2.3	1.0	2.1	2.2	2.2	1.0	0.5
Oxygenated sesquiterpenes	0.1	-	0.1	0.1	3.1	0.1	-	0.2	3.1	3.7
Esters	4.9	5.4	5.4	7.0	9.9	4.5	3.2	8.6	9.9	12.8
Alcohols	4.2	2.8	3.9	2.2	4.4	29.0	1.9	3.2	4.4	7.3
Ketones	0.7	0.1	0.6	0.2	0.4	0.3	0.1	0.2	0.4	0.2
Aldehydes	43.0	25.4	28.0	35.3	10.2	25.6	3.2	8.5	10.2	11.2
Total identification (%)	94.6	96.6	98.6	96.7	99.4	90.4	97.2	98.8	99.4	98.1
Total area 105 a	223.2	282.8	351.0	303.1	454.1	426.4	96.8	206.4	454.1	451.2

^a Total area is expressed in arbitrary units

Fresh aerial parts of Daucus crinitus Desf. used for this study were harvested in Bensekrane.