Parathion-ethyl, 100 µg/ml, Cyclohexane, 1ml

3,3'-Dichlorobenzidine,100 µg/mL,acetonitrile,1mL

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)

2,3,6-Trichlorophenol