EPA Method 1664 - Oil & Grease (Sonicate) Back Catalog number: 91958 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 0371.21-200-T 7-Methylbenzo[a]pyrene, 200µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 63041-77-0 Price on request 73312 Methyl cis-11,14,17-eicosatrienoate (C20:3n-3) Price on request 100031-1-100ML Mg, 1000 µg/mL in 2% HNO3, 100ml Price on request