Atrazine-2-hydroxy D5, 100µg/mL in MeOH, 1,1ml

n-Pentacosane, ?13C: -28.21, 150µg/mL, Solvent-cyclohexane, Unit 1mL, # of units-1, Cas.no. 629-99-2

3-Methylphenol, 100 µg/ml, Acetonitrile, 1ml

EPA Method 552 Internal Standard