EPA Method 528 Internal Standard Back Catalog number: 93188 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended XA13020100AC Diuron D6, 100 µg/mL in Acetone, 1,1ml Price on request 0272.24-10MG Naphtho[2,3-j]fluoranthene, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 205-83-4 Price on request C16190000 Phthalimide, certified, 0.5g Price on request