4-n-Octylphenol-di-ethoxylate, 10.0 µg/ml, Aceton

2,3,4-Tribromodiphenyl ether, 1.2ml x 50ug/ml, nonane

Dalapon acid

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)