EPA Method 622 / 8141 - Analytes Back Catalog number: 90378 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 11420.27-K-ME Verapamil,1000 µg/mL,MeOH,1mL, Price on request 1780.10-100-AN 2-Aminonaphthalene,100 µg/mL,acetonitrile,1mL, Price on request 71015 Dibenzothiophene Price on request