Internal Standard Stock Solution, 1.2ml, nonane

n-Butyl iso-pentyl phthalate (n-Butyl 3-methylbutyl phthalate), 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 144648-76-0

Iopanoic acid,10 µg/mL,water,1mL,

4,4'-DDD, 250mg