Multi-Element Internal Standard

2,3,5,6-Tetrabromo-p-xylene, 50µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no.

Perfluoropropanoic acid, 50µg/ml in MeOH, 1,2ml

Endosulfan-sulfate, 100 µg/ml, Cyclohexane, 1ml