2,2’,5-Trichlorobiphenyl (18)

2-Amino-3-methyl-3H-imidazo[4,5-f]quinoxaline (IQx), 2,5mg

Tetra-n-butyltin, 250mg

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)