Metribuzin-diketo, 100 µg/ml, Acetonitrile, 1ml

Etirazetam, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no.

2,3-Dichloro[13C12]dibenzofuran, 1.2ml x 50ug/ml, toluene

Method 200.8/1638/1640 Internal Standard