Atrazine-2-hydroxy, 100 µg/ml, Methanol, 1ml

Aqueous ethanol control EtOH AQ (1.0g/L), 10 x 3.0ml

Dibenz[a,h]anthracene-d14, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-10, Cas.no. 13250-98-1

EPA Method 508 - Performance Check Solution