2-Nitrophenol, 100 µg/ml, Methanol, 1ml

Parathion-ethyl, 100 µg/ml, Toluene, 1ml

1,2,3,7,8-Pentachloro(13C10)naphthalene, 1.2mL x 50ug/mL, nonane

13C4-Fipronil, 100 µg/ml, Acetonitrile, 1ml