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Chromatograms from selectivity study. Blank plasma chromatograms in purple, blue, red and green; blank hemolyzed plasma chromatogram in pink; blank lipemic plasma chromatogram in orange; PLGA + plasma in yellow; metformin 250 ug mL−1 in black (m/z 130.1 → m/z 60.1) and isoniazide 1000 ng mL−1 in grey (m/z 138.1 → m/z 121.1).
