2,7-Dichlorodibenzo-p-dioxin,50 µg/mL,n-nonane,1mL,

Mass-Labelled PCB Syringe Spike Solution, 1.2ml, nonane

Paraoxon-ethyl, 10 µg/ml, Acetonitrile, 10ml

1,2,3,4-Tetrachloro[13C12]dibenzofuran (97.5%), 1.2ml x 48.75ug/ml, toluene