QC Standard 4

D4-4-n-Nonylphenol, 100 µg/ml, Acetone, 10ml

2,2',3',4,4',5,6'-Heptachloro-3-methoxybiphenyl, 1.2ml x 50ug/ml, nonane

1,3,4,6,8-Pentachloro[13C12]dibenzofuran, 1.2ml x 50ug/ml, toluene