Alachlor, 1.0mg/mL in MeOH, 1ml

gamma-HCH, 100 µg/ml, Ethyl acetate, 5ml

Sodium 1H,1H,2H,2H-perfluorooctylphosphate, 1.2ml x 50ug/ml, methanol

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)