Acetic acid-13C2,2000 µg/mL,MeOH,1mL,

Heptachlor-endo-epoxide (isomer A), 1.2mL x 100ug/mL, nonane

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

Nitrofen, 100 µg/ml, Acetonitrile, 1ml