Heptachlor-exo-epoxide, 10 µg/ml, Cyclohexane, 1

2,3,7-Trichloro[13C12]dibenzo-p-dioxin, 1.2ml x 50ug/ml, toluene

d4 C28 alpha alpha alpha (20R)/C29 alpha alpha alpha (20R)-Methyl/Ethylcholestane, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no.

Ciprofloxacin, 1000µg/ml in 0,1mol/l HCl, 1ml