Paraoxon-ethyl, 100 µg/ml, Cyclohexane, 5ml

PCB 138, 10.0 µg/ml, Isooctane, 10ml

4-Ethylcatechol, 100 µg/ml, Methanol, 10ml

Perfluoro-n-[1,2,3,4-13C4]heptanoic acid, 1.2ml x 50ug/ml, methanol