EPA Method 8330 Analyte Back Catalog number: 79252 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 677188 Acrinathrin, 100mg Price on request 2540.7-K-ME Paraxanthine, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 611-59-6 Price on request 11319.13-10MG Melatonin,neat,neat,10mg, Price on request