Internal Standard

Terbutryn D5, 100µg/ml in Acetone, 1ml

Tri-n-butyl phosphate, 1.2ml x 50ug/ml, toluene

Butylcyclohexyl phthalate (Mixture with dibutyl and dicyclohexyl phthalates),1000 µg/mL,isooctane,1mL,