Figure 1.
A—BFR mixture standard chromatogram at 50 μg/L. B—chromatograms obtained from an extract of C. annum L. spiked at 0.75 μg/kg using the CL3 (150 MgSO4 + 50 mg PSA + 50 mg C18 + 5 mg carbon) C—chromatograms obtained from an extract of C. annum L. spiked at 0.75 μg/kg using the CL7 (150 MgSO4 + 50 mg PSA +50 mg C18 + 5 mg S-GF) D—chromatograms obtained from an extract of C. annum L. spiked at 0.75 μg/kg using the CL5 (150 MgSO4 + 50 mg PSA + 50 mg C18 + 5 mg rGO).