Nitrite as NO2-

Perfluorooctane sulfonic acid , 50ug/ml, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 1763-23-1

2-Methylfluorene, 1000µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 1430-97-3

Sodium 1H,1H,2H,2H-[1,2-13C2]perfluorodecylphosphate, 1.2ml x 50ug/ml, methanol