This test method determines ammonia nitrogen in aqueous samples and extracts by continuous flow analysis. A preliminary, automated gas diffusion step selectively separates ammonia from the sample matrix prior to colorimetric determination by the Berthelot reaction. The gas diffusion step eliminates the need for steam distillation.
This standard will be developed with the intent for inclusion at 40 CFR Part 136.3 allowing its use for compliance reporting of ammonia nitrogen. End users are environmental laboratories.
KeywordsEPA 350.1, ammonium, nutrient
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top