0.1M KH2PO4

1,1-Dichloroethene, 20mg/ml in MeOH, 1ml

2,3,3',4,5,5'-Hexachlorobiphenyl,100 µg/mL,isooctane,1mL,

2-n-Octylphenol-mono-ethoxylate, 100 µg/ml, Aceto