EPA Method 507/1656 Nitrogen Phosphorus

JWH-370,1000 µg/mL,MeOH,1mL,

1,2-Dibromoethylbenzene,1000 µg/mL,isooctane,1mL,

Perfluoro-n-[1,2,3,4-13C4]heptanoic acid, 50µg/ml in MeOH, 1,2ml