3,3'-Dimethylbenzidine,100 µg/mL,acetonitrile,1mL,

Fenuron, 10 µg/ml, Acetonitrile, 10ml

n-Heneicosane, ?13C: -28.59, 150ug/ml, Solvent-cyclohexane, Unit 1mL, # of units-10, Cas.no. 629-94-7

Surrogate Standard