EPA Method 507 - Performance Check Solution

4,4'-Dichlorobenzhydrol, 250mg

n-Hexatriacontane-d74, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 16416-34-5

Quinine hemisulfate,1000 µg base/mL,MeOH,1mL