1.1 This test method is applicable for the analysis total nitrogen (organic nitrogen + ammonium + nitrate + nitrite) as nitrate and total phosphorus as orthophosphate in unfiltered water samples by alkaline persulfate digestion followed by ion chromatography. The analytical step is equivalent to ASTM D4327. 1.2 Total Kjeldahl nitrogen is determined by subtraction of an undigested sample from a digested sample. (see Summary of Test Methods)
This standard is needed because it is a new, direct injection technique for the simultaneous determination of total nitrogen and total phosphorous.
Keywordsnitrate, phosphate, anions, total nitrogen, total phosphorous
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top