Dibenzofuran

1,2,3-Trimethylbenzene, 100 µg/ml, Methanol, 1ml

2,3-Dibromopropyl 2,4,6-tribromophenyl ether, 1.2ml x 50ug/ml, toluene

3,3',4,5'-Tetrachloro[13C12]biphenyl, 1.2ml x 50ug/ml, nonane