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LC-UV chromatograms of (a) CYN analytical standard, 10.5 ng injected; (b) crude BGA extract, 0.125 mg matrix-equivalent injected; (c) crude BGA extract spiked with CYN at 126 μg g−1, 0.125 mg matrix-equivalent injected; and (d) crude BGA extract spiked with CYN at 126 μg g−1, followed by C18 plus PGC clean-up, 0.125 mg matrix-equivalent injected.
