GFAA Initial Calibration Verification Back Catalog number: 52315 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 681491 13C3-Caffeine, 100 µg/ml, Methanol, 1ml Price on request 9884.0-1-05ME Azaspirazide 2, 1.5 µmol/L , Solvent-methanol, Unit 0.5mL, # of units-1, Cas.no. Price on request 71752 alpha-Terpineol Price on request