Ammonia Nitrogen Speciation Analysis in Aquatic Environments

Abstract

Abstract-The accurate measurement of different species of ammonia nitrogen is essential to understanding of the selfpurification and pollution status of water system as well as revealing the aquatic ecological environment. In the paper, the analytical methods for ammonia nitrogen species in aquatic environments on spectrophotometry, distillation-titration method, chromatographic analysis, gas phase molecular absorption spectrometry, electrode method, flow-injection analysis were systematically summarized. The principle of the mentioned methods, scope of applications and the different influence factors were discussed, and the new trend in the future was also pointed out.

Gold Nanoparticle-Modified Electrodes for Electrochemical Sensing of Ammonia Nitrogen in Water

“…6 The determination of aN is indeed the primary task of water quality management and water source protection. At present, several methods including spectroscopy (e.g., colorimetry and fluorometry), 7,8 chromatography, 9 titrimetry, 10 and electrochemistry, have been reported for the quantitative analysis of aN. The instruments used in the first two techniques are relatively expensive to acquire and maintain, and too bulky to leave a laboratory.…”

An Electrochemical Enzyme Biosensor for Ammonium Detection in Aquaculture Using Screen-Printed Electrode Modified by Gold Nanoparticle/Polymethylene Blue

“…Ammonia nitrogen is an important index of aquaculture water, which refers to the sum of molecular ammonia (NH 3 ) and ammonium ion (NH 4 + ) in water. Ammonia nitrogen in aquaculture water mainly comes from feces and other excrement of aquaculture animals, residual bait, plankton debris and sludge at the bottom of the pond [1,2]. When water is anoxic, denitrification of organic matter, nitrate and nitrite will also produce a part of ammonia nitrogen under the action of anaerobic bacteria.…”