EPA-1668IS Internal Standard Stock Solution - 1.2 ml in nonane

INTERNAL STANDARDS IUPAC (ng/ml)

2,2',5,5'-Tetrachloro[13C12]biphenyl 52L (1000)

2,2',4,5,5'-Pentachloro[13C12]biphenyl 101L (1000)

2,2',3,4,4',5'-Hexachloro[13C12]biphenyl 138L (1000)

2,2',3,3',5,5',6-Heptachloro[13C12]biphenyl 178L (1000)