Isofetamid, 100 µg/ml, Acetone, 1ml

2-Methylnaphthalene, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 91-57-6

Tebutam, 10.0 µg/ml, Ethyl acetate, 10ml

EPA Method 502.2 Internal Standard