EPA Method 8021B Internal Standard

2-(4-[Methylsulfonyl]phenyl)-1H-benzimidazole, neat, Solvent-neat, Unit 10MG, # of units-22, Cas.no. 143426-39-5

n-Perfluorododecanoic acid, 50µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 307-55-1

Cyclosulfamuron, 100mg