D7-Atenolol, 100 µg/ml, Acetonitrile, 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)

Aromatic Hydrocarbons Mix 11, 2000 ng/µl, 1ml

Atrazine D5 (ethylamino D5), 1000 µg/mL in Acetonitrile, 1ml