Metazachlor ethane sulfonic acid, 100µg/ml in Acetonitrile, 1ml

PCB No. 206, 10ug/ml in Isooctane, 10ml

4,4'-DDD (=TDE), 100µg/mL, Solvent-dichloromethane, Unit 1mL, # of units-1, Cas.no. 72-54-8

Nitrate (NO3-) as N