In Situ Synthesis of a Magnetic Graphene Platform for the Extraction of Benzimidazoles from Food Samples and Analysis by High-Performance Liquid Chromatography

Table 2

Analysis of BMZs in food samples using the magnetic solid-phase extraction coupled to HPLC .

Samples	Analytes	Original amount (ng/g)	RSD (%)	Spiked concentration (ng/g)
				0.80 ng/g		8.0 ng/g
				Recovery (%)	RSD (%)	Recovery (%)	RSD (%)
Chicken	OXF	13.0	3.9	84.1	4.2	94.8	3.4
	MEB	3.00	7.2	83.0	4.9	105	3.4
	FLU	4.56	6.2	84.8	5.9	105	5.1
	ALB	0.450	6.3	89.6	5.8	107	4.8
	FEN	1.04	8.7	84.7	7.9	92.4	6.4
Chicken blood	OXF	17.5	3.7	93.0	3.9	93.6	4.2
	MEB	1.62	5.1	95.7	3.0	101	2.9
	FLU	1.94	6.4	102	4.7	102	4.1
	ALB	N.Q.	—	95.7	4.3	112	3.5
	FEN	0.292	8.9	87.2	6.0	94.6	4.5
Chicken liver	OXF	20.2	3.5	85.9	4.2	90.9	3.5
	MEB	4.64	5.6	88.7	5.1	115	4.3
	FLU	6.42	4.3	91.8	3.4	108	2.7
	ALB	0.342	5.7	97.8	3.9	112	3.4
	FEN	1.01	6.9	95.0	4.0	97.3	3.6

Note. N.Q.: not quantified.