EPA Method 8240A/1666 - Purgeable Internal Std

D7-Propranolol hydrochloride, 100 µg/ml, Water,

Methanol QC Reference Mixture III n-Butyl sulfide, 0.5 ppm (weight S by weight) in 99.9 % methanol; units: 1x10mL, 5x10mL

(24R)-24-Methylcholest-5-ene and (24R)-24-Ethylcholest-5-ene, 200µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 76866-89-2 / 76866-91-6