EPA Method 551.1 Internal Standard Back Catalog number: 30103 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 93087 Volatile Standard Price on request L10360000IO Azinphos-ethyl, 10µg/mL in Isooctane, 10ml Price on request 675890 Pesticide-Mix 41, 10.0 µg/ml, Acetonitrile, 10ml Price on request