BHC (epsilon isomer), 100ug/ml in Toluene, 1ml

Sulfur Calibration Mixtures: Di-n-butyl sulfide in Light White Oil (less than 20mg/kg S) Unit : 10mL screw-capped bottle Light White Mineral Oil Heavy White Mineral Oil (20 cSt at 40°C) (70 cSt at 40°C)

2,4,4'-Trichlorobiphenyl-2',3',5',6'-d4, 100 µg/mL in Isooctane, 1mL

2,3,6,7-Tetrachloro(13C10)naphthalene, 1.2mL x 50ug/mL, nonane