1-(4-Chlorophenyl)urea, 100 µg/ml, Acetonitrile,

Tritosulfuron, 100mg

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)

Phenanthrene, 10µg/ml in Acetonitrile, 10ml