calibration standard: isocyanate derivatives, 5 μg/mL in acetonitrile blank: 1-(2-pyridyl)piperazine (1-2PP) coated glass fiber filter desorbed in acetonitrile/DMSO, 9:1
ORBO-80 (20811)
SUPELCOSIL LC-8, 25 cm × 4.6 mm I.D., 5 μm particles (58297)
0.05 M ammonium acetate in water:acetonitrile, 70:30 (pH 6-6.2 with acetic acid)
linear gradient, 0.7 mL/min to 2 mL/min in 15 min
UV, 254 nm
10 μL
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