Clethodim-sulfone, 100 µg/ml, Acetonitrile, 1ml

2,2',3,4,5',6-Hexachlorobiphenyl ,100 µg/mL,isooctane,1mL,

alpha-BHC-13C6,100 µg/mL,n-nonane,1mL,

N-Nitrosodi-n-propylamine