Nitrite (NO2-) as N

n-Tetracontane, certified, 0.1g

4-Chlorophenol-2,3,5,6-d4, OD,1000 µg/mL,isopropanol,1mL,

3-Perfluoropentyl propanoic acid (5:3), 50µg/ml in MeOH, 1,2ml