EPA Method 531.1 - Performance Check Solution

Fensulfothion-sulfone, 100 µg/ml, Cyclohexane, 1

2,5-Dichloro-o-terphenyl, 100µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no.

3,3'-Dimethylbenzidine, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 119-93-7