The Potential of Graphene as an Adsorbent for Five Pesticides from Different Classes in Rape Oil Samples Using Dispersive Solid-Phase Extraction

Table 1

Effect of the graphene amount on extraction efficacy of the five pesticides from rape oil samples.

Pesticide	Extraction recovery (%),
	9 mg of graphene	12 mg of graphene	15 mg of graphene	18 mg of graphene	21 mg of graphene
Metazachlor	11 ± 3	64 ± 7	68 ± 5	26 ± 5	14 ± 5
Tebuconazole	38 ± 8	72 ± 5	77 ± 5	44 ± 7	29 ± 7
λ-Cyhalothrin	56 ± 7	52 ± 6	60 ± 5	38 ± 11	17 ± 8
Chlorpyrifos	12 ± 7	63 ± 9	66 ± 7	49 ± 7	23 ± 6
Deltamethrin	13 ± 5	63 ± 11	68 ± 9	18 ± 4	14 ± 5
OC^1	26.0 ± 20.3	63.0 ± 7.1	67.0 ± 6.2	35.1 ± 12.6^2	19.4 ± 6.5^2

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