EPA Method 8250/8250A Cal Check BNS

d4 C28 alpha alpha alpha (20R)/C29 alpha alpha alpha (20R)-Methyl/Ethylcholestane, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no.

Arochlor 1254, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 11097-69-1

Phenyl sulfide