EPA Method 524 & 624 - Internal Standard Back Catalog number: 19494 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 97911 Paraquat Price on request L20795100AC Fluoranthene D10, 10µg/mL in Acetone, 10ml Price on request 677050 Tributyl O-acetylcitrate, 250mg Price on request