EPA Method 548.1 Analyte Back Catalog number: 30177 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended S274982 Serotonin-d4 Hydrochloride, 2,5mg Price on request 681526 Sulcotrione, 100 µg/ml, Acetonitrile, 5ml Price on request 678003 Fensulfothion, 100 µg/ml, Toluene, 1ml Price on request