Barium (Ba)

1-(4-Chlorophenyl)urea, 100 µg/ml, Acetonitrile,

o,p'-DDT, 100µg/ml in MeOH, 1ml

Sodium 1H,1H,2H,2H-perfluoro-1-[1,2-13C2]-decane sulfonate (8:2), 50µg/ml in MeOH, 1,2ml