Mass-Labelled PCB Extraction Standards, 1.2ml, nonane

[13C12]Dibenzo-p-dioxin, 1.2ml x 50ug/ml, toluene

2,4-Dibromophenol-PFB, 1000µg/mL, Solvent-isopropanol, Unit 1mL, # of units-1, Cas.no.

4-Bromophenylurea, 100µg/ml in Acetonitrile, 1ml