Nitrate as (NO3-)

Sodium perfluoro-1-hexane[18O2]sulfonate, 1.2ml x 50ug/ml, methanol

n-Tetradecane, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 629-59-4

EPA Method 525 - Tuning Standard