Methylcyclohexane

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

2,5-Dinitrotoluene, 100µg/ml in MeOH, 5ml

Tributylacetylcitrate,1000 µg/mL,isooctane,1mL,