Fig. 3

Representative chromatograms of cannabinoid (A and C) and pesticide (B and D) test samples. Chromatograms A and B used the instrument method reported in "Instrument method" section. The large peak occurring at 11.1Â min is likely unresolved late-eluting species such as CBTC and permethrin. Chromatograms C and D used a flow rate of 1.0 mL/min, causing peaks to elute earlier