Nitrite (NO2-) as N

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

Resmethrin, 1000µg/ml in MeOH, 1ml

2,2-Bis(4-hydroxy-13C6-phenyl)propane, 1.2ml x 50ug/ml, methanol