Calibration Standard Mix 4

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

2,2',4-Tribromodiphenyl ether, 1.2ml x 50ug/ml, nonane

4-Nitrophenol, 10.0 µg/ml, Acetonitrile, 10ml