Fig. 2.

LC-DAD/FLD chromatograms (DAD: 310 nm, FLD: excitation 310 nm, emission 390 nm) showing baseline separation of all of the rodenticides (coumafuryl (1), warfarin (2), phenprocoumon (3), acenocoumarol (4), coumatetralyl (5), coumachlor (6), diphacinone (7), dicoumarol (8), tioclomarol (cis: 9a, trans: 9b), chlorophacinone (10), ferulenol (11), bromadiolone (cis: 12a, trans: 12b), difenacoum (13), flocoumafen (cis: 14a, trans: 14b), brodifacoum (15), difethialone (16); 0.01 µg/mL: 5; 0.1 µg/mL: 1–3, 6, 9a/b, 11–15; 1 µg/mL: 4, 7, 8, 10, 16) by ion-pair chromatography using a biphenyl column (150 mm × 4.6 mm, 2.6 µm) and gradient elution (solvent A: 10 mmol/L acetic acid/DIPEA in water, solvent B: 10 mmol/L acetic acid/DIPEA in methanol, flow rate: 0.7 mL/min, min/% B: 0/48, 10/78, 25/98, 30/48, 40 °C)