2,4'-DDD, 100 µg/ml, Acetonitrile, 5ml

2,2',4,4',5,5'-Hexachloro[13C12]biphenyl, 1.2ml x 50ug/ml, nonane

Tri-m-tolyl phosphate , 1.2ml x 50ug/ml, toluene

VOC Mix #2