EPA Method 8240A Calibration Check Compounds

Metazachlor ESA sodium salt, 100µg/ml in Acetonitrile, 1ml

d2 C27 alpha alpha alpha (20R)-Cholestane, 100µg/mL in Isooctane, 5 x 1ml

Benzyl benzoate, 2000µg/mL, Solvent-hexane, Unit 1mL, # of units-1, Cas.no. 120-51-4