Separation and Determination of Paraquat and Diquat in Human Plasma and Urine by Magnetic Dispersive Solid Phase Extraction Coupled with High-Performance Liquid Chromatography

Table 3

The recoveries and matrix effect of paraquat and diquat.

Sample	Analytes	Concentration (ng/mL)	Recoveries ± RSD (%)	Matrix effect ± RSD (%)
Patient’s plasma	Paraquat	152.5	92.3 ± 2.6	88.7 ± 4.5
	Diquat	255.8	98.7 ± 3.2	95.7 ± 3.7
Patient’s urine	Paraquat	210.6	87.5 ± 4.7	91.7 ± 2.5
	Diquat	356.8	93.5 ± 3.8	103.8 ± 4.3