Peak Deconvolution Analysis with Photodiode Array Detector

The USEPA Clean Water Act (CWA) requires national approval for all methods used for CWA compliance. There are approved methods for the determination of inorganic nitrogen (NO₃-N, NO₂-N, and NH₃-N), and for organic nitrogen (TKN - NH₃-N). There are no EPA approved methods for the determination of total nitrogen although it is a required parameter in many USEPA permits, including monitoring of nutrient pollution for ambient water criteria. Because Part 136.3 Table 1b methods are required, laboratories have no recourse but to measure total nitrogen as the sum of TKN, NO₃-N , and NO₂-N.