Chlorthal-dimethyl, 100 µg/ml, Acetonitrile, 5ml

d4 C29 alpha alpha alpha (20R)-Ethylcholestane, 100µg/mL in Isooctane, 1ml

2-Phenylphenol, 100 µg/ml, Ethyl acetate, 5ml

0.020 N Sodium Hydroxide