1,4,5,8-Tetrachloronaphthalene (96%), 1.2ml x 48ug/ml, nonane

Phorate, 100 µg/ml, Toluene, 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)

Diisobutyl phthalate, 250mg