EPA-8280IS - Internal Standard Solution - 1.2 ml in toulene which contains;

INTERNAL STANDARDS (ng/ml)

2,3,7,8-Tetrachloro[13C12]dibenzo-p-dioxin (5)

2,3,7,8-Tetrachloro[13C12]dibenzofuran (5)

1,2,3,6,7,8-Hexachloro[13C12]dibenzo-p-dioxin (5)

1,2,3,4,6,7,8-Heptachloro[13C12]dibenzofuran (10)

Octachloro[13C12]dibenzo-p-dioxin (10)