Nitrate (NO3-) as N Back Catalog number: 50286 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 79149 4,4’-DDE Price on request 10561.19-50-T 9-Methylbenz[a]anthracene Price on request L429-IS Method 429 Internal Standard Solution, 100µg/ml in Isooctane/25% toluene, 1,2ml Price on request