Oil & Grease Calibration Back Catalog number: 97835 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2193.8-50-ME Perfluorooctane sulfonic acid, potassium salt,50 µg/mL,MeOH,1mL, Price on request ACQ-AQ40-115 Ethanol standard in water,4.0g/L,water, 1.5mL Price on request 93782 Pesticide Standard Price on request