o-Toluidine, 100 µg/ml, Acetonitrile, 1ml

Terbufos, 10µg/ml in Cyclohexane, 10ml

2,2',3,4',6-Pentachlorobiphenyl,100 µg/mL,isooctane,1mL,

Oxalic Acid (C2H2O4)