EPA Method 552,552.1,552.2 Internal Std Back Catalog number: 30105 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended A15987120MW-100 Perfluorooctane sulfonic acid, 100µg/mL in MeOH:Water, 1ml Price on request C14232800 5-Hydroxymethyl-2-furfural, certified, 0.1g Price on request CFN98784 Luteolin, >98%, 20mg Price on request