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

Menthol, certified, 0.25g

4-Chloromethyl-2,2-dimethyl-1,3-dioxolane, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 4362-40-7

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)