2,4'-DDT, 100 µg/ml, Ethyl acetate, 5ml

1-Chloro-1,1-difluoroethane, 20mg/mL in MeOH, 1ml

Triphenylphosphate-d15

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)