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

Table 5

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

Pesticide	Extraction recovery (%),
	2 g NaCl	1 g NaCl	Without addition of NaCl
Metazachlor	68 ± 5	69 ± 6	22 ± 6
Tebuconazole	74 ± 8	73 ± 8	19 ± 4
λ-Cyhalothrin	60 ± 7	63 ± 4	9 ± 5
Chlorpyrifos	66 ± 7	70 ± 9	24 ± 5
Deltamethrin	66 ± 7	68 ± 7	20 ± 5
OC^1	66.8 ± 5.5	68.5 ± 4.2	19.0 ± 6.5^2

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