1.1 These test methods cover the Catalyzed Ozone Hydroxyl Radical Oxidation system for the on-line analysis of total nitrogen and total phosphorus in water, wastewater and industrial wastewater. 1.2 The nitrogen concentrations measured are in the range from 0.02 mg/L up to 15 000 mg/L. The phosphorus concentrations measured are in the range from 0.03 mg/L up to 30 000 mg/L. 1.3 These methods allow the measurement of high nitrogen and phosphorus concentration samples without any filtration and dilution requirement. 1.4 The chemical oxidation process, which is the catalyzed ozone hydroxyl radical oxidation (1) used for the analysis of total nitrogen and total phosphorus, takes place at atmospheric pressure and at ambient temperatures in a high pH environment using hydroxyl radicals. The oxidation process allows the measurement of both total nitrogen and total phosphorus contents of liquid samples, in one analyzer system, after a single oxidation process. The oxidation process is self-cleaning. NOTE 1 ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. 1.5 These methods do not allow any organic and inorganic carbon interference on the total nitrogen and total phosphorus analyses as all carbon present in the samples are removed in the form of CO2 gas prior to measurement. 1.6 The on-line analyses of total nitrogen and total phosphorus, or both, by Catalyzed Ozone Hydroxyl Radical Oxidation technology are utilized in a wide range of industries across the globe, including applications where total nitrogen and total phosphorus analyses were previously considered to be difficult. These methods are alternative test methods for the measurement of total nitrogen and total phosphorus in water. 1.7 The values stated in SI units are to be regarded as standard. 1.8 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see section 10.
The Catalyzed Ozone Hydroxyl Radical Oxidation method is an alternative chemical oxidation method which does not use the traditional oxidation technologies. This method is currently being used in a wide range of industries across the globe as a self-cleaning, low maintenance, accurate and reliable method for total nitrogen and total phosphorus analyses in waters, waste waters and industrial waste waters. The total nitrogen and total phosphorus measurement by Catalyzed Ozone Hydroxyl Radical Oxidation method help solve many problems in the industry and help the user to detect and identify process problems, product losses, wastewater loading etc.
Keywordstotal nitrogen; total phosphorus; hydroxyl radical; oxidation; water analysis; on-line monitoring; total organic carbon; total inorganic carbon; photometer; colorimetric measurement.
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top
Draft Under Development