D3-Methiocarb, 100 µg/ml, Cyclohexane, 1ml

2,3,4,5-Tetrachloro-4'-methoxy[13C12]biphenyl, 1.2ml x 50ug/ml, toluene

Ethion, 1000µg/ml in MeOH, 1ml

EPA Method 8260 Internal Standard - Revised