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

n-Hexane, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 110-54-3

D5-Propachlor OA, 100 µg/ml, Acetonitrile, 1ml

Phenylacetic acid