Research Article
Separation and Determination of Paraquat and Diquat in Human Plasma and Urine by Magnetic Dispersive Solid Phase Extraction Coupled with High-Performance Liquid Chromatography
Figure 14
The UV spectra of PQ (a) and DQ (b) at different concentrations from 0.2 to 2.0 μg/mL. The colorimetric responses to different concentrations of PQ (c) and DQ (d) from 0.2–2.0 μg/mL.
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