25-Hydroxyvitamin D3, 50μg/ml, 1ml

Mirex, 100 µg/ml, Acetonitrile, 5ml

4,4’-DDE

Sulfur Calibration Mixtures: Di-n-butyl sulfide in Heavy 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)