(-)-Captopril,1000 µg/mL,MeOH,1mL,

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

Mixed Alcohols, Butanol/Methanol (63:37)

2,7/2,8-Dibromodibenzo-p-dioxin mix, 1.2ml x 50ug/ml, toluene