Journal Article10.1007/S00604-006-0496-Y
A Fast Sequential Injection Analysis System for the Simultaneous Determination of Ammonia and Phosphate
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TL;DR: A flow system based on sequential injection analysis (SIA) and suitable for the fast determination of ammonia and phosphate in river and marine waters is described in this article, which is applicable to nutrient mapping in inhomogeneous coastal areas like the Wadden Sea, and was optimised on several cruises on the North Sea.
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Abstract: A flow system is described that is based on sequential injection analysis (SIA) and is suitable for the fast determination of ammonia and phosphate in river and marine waters. It is applicable to nutrient mapping in inhomogeneous coastal areas like the Wadden Sea, and was optimised on several cruises on the North Sea. The high sample throughput of 120 samples per analyte per hour and the low reagent consumption (ammonia: 62.5 µL; phosphate: 60 µL) were achieved using a home made programme written in the python programming language. The determination of free reactive phosphate is based on the reaction of phosphate with acidic molybdate to phosphomolybdate which forms nonfluorescent ion pairs with rhodamine 6G. The remaining rhodamine fluorescence is detected at 550 nm with an excitation at 470 nm. Ammonia is determined with the help of o-phthaldialdehyde and sodium sulfite. At 85 °C and a reaction time of at least one minute a fluorescent species (exc. 365 nm, em. 425 nm) is formed. The detection limits are (3σ) 0.3 µmol L−1 for phosphate and 1 µmol L−1 for ammonia.
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Citations
Handbook of Water Analysis
Leo M.L. Nollet
- 29 Jul 2013
TL;DR: In this paper, the authors present a sampling and data treatment method for water analysis, which is based on the analysis of water samples collected by the National Institute of Water and Environmental Sciences.
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Analytical challenges and advantages of using flow-based methodologies for ammonia determination in estuarine and marine waters
Lenka O'Connor Šraj,M. Inês G.S. Almeida,Stephen E. Swearer,Spas D. Kolev,Ian D. McKelvie,Ian D. McKelvie +5 more
TL;DR: In this paper, the importance of the analysis of ammonia in estuarine and marine water samples and the challenges facing the analytical chemist are discussed. But, the presence of the analyte at trace concentrations (nanomolar) and the high salinity of the water make its analysis a real challenge.
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Development of analytical methods for ammonium determination in seawater over the last two decades
Yong Zhu,Jianfang Chen,Dongxing Yuan,Dongxing Yuan,Zhi Yang,Xiaolai Shi,Hongliang Li,Haiyan Jin,Lihua Ran +8 more
TL;DR: In this article, a review of the most commonly used ion-selective electrode, spectrophotometric, fluorometric and matrix separation methods for ammonium detection and analysis of seawater is presented.
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The Coastal Observing System for Northern and Arctic Seas (COSYNA)
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TL;DR: The Coastal Observing System for Northern and Arctic Seas (COSYNA) as discussed by the authors was established in order to better understand the complex interdisciplinary processes of northern seas and the Arctic coasts in a changing environment.
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- 01 Jan 2016
TL;DR: In this article, the authors focus on the German Bight in the North Sea as a prime example for a heavily used coastal area, and Svalbard as an example of an arctic coast that is under strong pressure due to global change.
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