WS Disinfection By-Products - Cal Check 4

2-Perfluorooctyl ethanoic acid (8:2), 50µg/ml in Isopropanol, 1,2ml

4-Chlorophenyl phenyl ether

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)