EPA Method 509 Internal Standard Back Catalog number: 30097 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 679562 D8-Sarafloxacin hydrochloride hydrate, 10mg Price on request A17270400AL-100 Terbufos-sulfone, 100µg/mL in Acetonitrile, 1ml Price on request 679389 D3-Flubendazole, 10mg Price on request