Initial Check Verif. Standard 4, in 4%HNO3, 100ml

Acetochlor, 1000µg/ml in MeOH, 1ml

1,1-Dichloro-2,2-bis[4-chloro(13C6)phenyl]ethane, 1.2mL x 100ug/mL, nonane

Doxepin hydrochloride