Nitrite (NO2-) as N Back Catalog number: 50120 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended MPFAC-HIF-ES Mass-Labelled PFAS Extraction Standard, in MeOH, 1,2ml Price on request C11705000 Corticosterone, certified, 0.1g Price on request 52145 Method 200.8 / 1638 / 1640 Internal Standard, in 2%-HNO3/Water, 4x25ml Price on request