1,2,3,6,7,8-Hexachlorodibenzofuran

2,4-Dibromophenol-3,5,6-d3,1000 µg/mL,isopropanol,1mL,

1,2,3,4,6,7,8-Heptachloro[13C12]dibenzo-p-dioxin, 1.2ml x 50ug/ml, toluene

EPA Method 1664 - Oil & Grease (Sonicate)