Development of analytical methods for ammonium determination in seawater over the last two decades

Y Zhu, J Chen, D Yuan, Z Yang, X Shi, H Li… - TrAC Trends in …, 2019 - Elsevier
Ammonium plays an important role in the nitrogen cycle in marine environments. There is no
universal method for ammonium analysis that can be applied to all types of seawater and …

High-frequency underway analysis of ammonium in coastal waters using an integrated syringe-pump-based environmental-water analyzer (iSEA)

P Li, Y Deng, H Shu, K Lin, N Chen, Y Jiang, J Chen… - Talanta, 2019 - Elsevier
Accurate methods and related robust analytical instruments for sensitive shipboard
determination of ammonium in coastal waters are highly desirable for both oceanographers …

Development of a sequential injection gas diffusion system for the determination of ammonium in transitional and coastal waters

RA Segundo, RBR Mesquita, MTSOB Ferreira… - Analytical …, 2011 - pubs.rsc.org
This work describes the development of a sequential injection system for the ammonium
determination in transitional and coastal waters with a wide salinity range. Estuarine waters …

Determination of ammonium using a microplate-based fluorometric technique

P Poulin, É Pelletier - Talanta, 2007 - Elsevier
The determination of ammonium (NH4+) in concentrations ranging from nanomolar to
micromolar in fresh and brackish waters often loaded in high suspended particulate matter …

Determination of ammonium in seawater by purge-and-trap and flow injection with fluorescence detection

Y Zhu, D Yuan, H Lin, T Zhou - Analytical Letters, 2016 - Taylor & Francis
An improved method for the determination of ammonium in seawater was established using
purge-and-trap pretreatment coupled with flow injection fluorescence. An appropriate …

Selective determination of ammonium in water based on HPLC and chemiluminescence detection

S Meseguer-Lloret, C Molins-Legua… - Analytica chimica …, 2005 - Elsevier
A selective and sensitive method has been developed for liquid chromatographic
determination of ammonium in water samples. The analyte is derivatized with Dansyl …

On-line solid phase extraction and spectrophotometric detection with flow technique for the determination of nanomolar level ammonium in seawater samples

G Chen, M Zhang, Z Zhang, Y Huang, D Yuan - Analytical letters, 2011 - Taylor & Francis
The determination of low-level ammonium in seawaters suffers from low sensitivity and high
contamination; therefore, it is desirable to develop highly sensitive methods for automatic …

Review of separation methods for the determination of ammonium/ammonia in natural water

M Zhang, X Dong, X Li, Y Jiang, Y Li, Y Liang - Trends in Environmental …, 2020 - Elsevier
Abstract Ammonium (NH 4+) and ammonia (NH 3) in aquatic ecosystems are of great
interest to environmental scientists because they can be used to study the nitrogen cycle …

Determination of ammonia nitrogen in natural waters: Recent advances and applications

K Lin, Y Zhu, Y Zhang, H Lin - Trends in environmental analytical chemistry, 2019 - Elsevier
Ammonia nitrogen, consisting of un-ionized ammonia and ammonium, is a key parameter for
studying the nitrogen cycle and indicating water quality. The measurement of these …

Ammonium determination in water samples by using OPA-NAC reagent: a comparative study with Nessler and ammonium selective electrode methods

S Meseguer-Lloret, C Molins-Legua… - … of Environmental & …, 2002 - Taylor & Francis
A selective and sensitive method based on the ammonium derivatisation with o-
phthaldialdehyde (OPA) and N-acetyl-cysteine (NAC) has been developed for ammonium …