Oxytetracycline, 96%,1000 µg/mL,acetonitrile,1mL,

2-Naphthylamine, 100mg

(6)Helicene, racemic mixture of two enantiomers, neat, Solvent-neat, Unit ca. 10µg , # of units-1, Cas.no. 187-83-7

Extraction Standard Solution, in nonane/3.2% toluene, 1,2ml