EPA Method 8240A Sys Perf Check Cmpds

3-Ethyl-2-methylthiopyrazine, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-, Cas.no.

Formothion, 100µg/ml in Acetonitrile

Carbophenothion-methyl, 10.0 µg/ml, Cyclohexane,