Internal Standard

Surfactant Mixture 2 2 Analytes, each 100µg/mL in toluene; unit: 1x5mL 1224.24 Bis(2-ethylhexyl) phthalate BEHP [117-81-7] 1223.24 Di-n-octyl phthalate DNOP [117-84-0]

Thiophene/2-Methylthiophene (2:1) in isooctane/Toluene(3:1); Units: 5x1mL ampoules, 1x10mL screw-capped bottle Chiron No. Concentration µgS/g (ppm) Wt.% S-4056-0 Blank 0 S-4056-5 5

Naltrexone (base, anhydrous), 100µg base/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 16590-41-3