p-Benzoquinone

4-Chloro-3-methylnitrobenzene,100mg/mL,acetonitrile,1mL,

Iopamidol, 100µg/ml in MeOH, 1ml

2,2',3,3',4,5,5'-Heptachloro-4'-methoxy[13C12]biphenyl, 1.2ml x 50ug/ml, toluene