Possible Influences on Ammonia Nitrogen Determination by Nessler's Reagent Spectrophotometry

Cheng-Yuan Hu, Qin-yi Gu, Hao Guo, Ying-li Yao, Can-xu Yao, Jing-ping Wang, Jian Chen


Nessler's reagent spectrophotometry is the traditional method for ammonia nitrogen (NH3-N) determination, which is adopted in the national standard of the People's Republic of China (HJ 535-2009). In order to improve the accuracy of such method, possible influences, Nessler's Reagent preparation, pH value of the solution, metal ions, organic solvents and natural organic matters, on NH3-N determination were discussed. The results suggested that the method B, employing KI, HgI2 and NaOH, is preferred in Nessler's Reagent preparation. And the Nessler's Reagent Spectrophotometry may be executed over a wide pH range (4-11). The metal ions, organic solvents and natural organic matters have significant influences in NH3-N detection.

Keywords Nessler's Reagent, Ammonia Nitrogen, pH, Metal Ion, Organic Solvent, Natural Organic Matter.

DOI: 10.7176/JNSR/11-24-02

Publication date: December 31st 2020

Full Text: PDF
Download the IISTE publication guideline!

To list your conference here. Please contact the administrator of this platform.

Paper submission email: JNSR@iiste.org

ISSN (Paper)2224-3186 ISSN (Online)2225-0921

Please add our address "contact@iiste.org" into your email contact list.

This journal follows ISO 9001 management standard and licensed under a Creative Commons Attribution 3.0 License.

Copyright © www.iiste.org