Internal Reference Standard

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)

Ethynyl Estradiol-2,4,16,16-d4, 1mg

2,3,4,4'-Tetrachlorobiphenyl ,100 µg/mL,isooctane,1mL,