EPA Method 1664 - Oil & Grease (Sonicate) Back Catalog number: 91958 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 673696 S421, 100 µg/ml, Ethyl acetate, 5ml Price on request 50193 Arsenic (As) Price on request 3481.7-100 Phorate-oxon , 100µg/mL, Solvent-c.hexane or ac.nitrile, Unit 1mL, # of units-1, Cas.no. 2600-69-3 Price on request