Table 2.

Effect of the desorbing solvent type on extraction efficacy of the five pesticides from rape oil samples.

Pesticide	Extraction recovery (%), n=3
	Acetonitrile	Acetone	Ethyl acetate	Dichloromethane/hexane (1 : 2,v/v)
Metazachlor	68 ± 6	33 ± 5	61 ± 8	43 ± 6
Tebuconazole	74 ± 7	22 ± 5	25 ± 5	34 ± 8
λ-Cyhalothrin	60 ± 6	20 ± 4	50 ± 6	42 ± 6
Chlorpyrifos	66 ± 6	42 ± 3	8 ± 7	63 ± 6
Deltamethrin	66 ± 5	21 ± 3	39 ± 5	34 ± 5
OC1	66.7 ± 5.0	27.7 ± 9.52	36.9 ± 20.82	43.5 ± 11.82

¹Value of the optimization criterion; ²statistically significant from the highest result.