Native PCB Solution, 1.2ml, nonane

Crotoxyphos, 10.0 µg/ml, Isooctane, 10ml

Toluene

EPA 528 rev. 1.0 Internal Standard Solution 2 200µg/mL in dichloromethane; unit: 1x5mL 2081.6 2,3,4,5-Tetrachlorophenol [4901-51-3]