Naproxen, 100 µg/ml, Methanol, 1ml

2,3,8-Trichlorodibenzofuran, 1.2ml x 50ug/ml, nonane

Ammonia as (NH4+)

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