Ammonium bicarbonate as (NH4+)

2,3,4',4'-Tetachlorobiphenyl,100 µg/mL,isooctane,1mL,

Iodofenphos, 100 µg/ml, Acetonitrile, 1ml

2,2',3,3',4,5,5',6,6'-Nonachloro[13C12]biphenyl, 1.2ml x 50ug/ml, nonane