pH 7.0 Standard @ 25°C

2,2',3,3',5,6-Hexachlorobiphenyl ,100 µg/mL,isooctane,1mL,

3-Ethylphenol, certified, 0.5g

N-Ethyl-N-(2-hydroxyethyl)perfluorooctylsulphonamide,50 µg/mL,acetonitrile,1mL,