VPH Calibration Check Standard Rev 1.1

2,8-Dihydroxyadenine, 2,5mg

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

2-Nitrofluorene, 200ug/mL in Toluene, 1ml