EPA Method 515.1 - Performance Check Solution

n-Hentriacontane, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 630-04-6

25-Hydroxyvitamin D2-d6 (Dimethyl 26,27-d6)

Thiacloprid, 1000µg/ml in Acetonitrile, 1ml