6:2 Di-PAPS-d4, neat, Solvent-neat, Unit 5mg, # of units-1, Cas.no.

Ametryn, 100 µg/ml, Acetonitrile, 5ml

1-Tetracosanol, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 506-51-4

EPA Method 8260B Purgeable Internal Standard