Paraoxon-methyl, 100 µg/ml, Ethyl acetate, 5ml

Fluorene, 10µg/ml in Acetonitrile, 10ml

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)

2,2',4-Trichlorobiphenyl (17)