Development of Analytical Method for Ammonium Nitrogen by Continuous Flow Analysis Using a Gas Separator
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- TAKAHASHI Nodoka
- BL TEC K.K.
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- KUMAZAWA Yorihiro
- BL TEC K.K.
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- KANNO Ryosei
- BL TEC K.K.
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- MORIKUBO Satoshi
- Tokyo Metropolitan Industrial Technology Research Institute
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- ENOMOTO Daisuke
- Tokyo Metropolitan Industrial Technology Research Institute
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- TAKUMA Yasuhiko
- Tokyo Metropolitan Industrial Technology Research Institute
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- OKUNISHI Suguru
- Faculty of Fisheries, Kagoshima University
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- MAEDA Hiroto
- Faculty of Fisheries, Kagoshima University
Bibliographic Information
- Other Title
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- 気液分離器を用いたCFA法によるアンモニア態窒素分析手法開発
Abstract
<p>In order to establish a quick and simple analytical method for ammonium nitrogen without using phenol, which is a harmful substance, we developed a method involving continuous flow analysis (CFA). To prevent interference by metal ions in the sample, ethylenediaminetetraacetic acid (EDTA) was added to the flow. A gas separator using a PTFE membrane filter was used to prevent EDTA interfering with the coloring mechanism and to avoid the effects of foreign substances on the measurement. Only ammonia in the sample is separated by the gas separator in the form of gaseous ammonia and is measured by the salicylic acid indophenol method; this enables analysis without using phenol, and with less susceptibility to inhibiting substances. Both this method and the conventional method using phenol were used to measure samples including seawater and industrial wastewater, and equivalent results were obtained. An evaluation of the method itself confirmed that there was no significant difference from the conventional method. These results suggest that our method offers the same measurement performance as the conventional method and can replace it.</p>
Journal
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- Journal of Environmental Conservation Engineering
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Journal of Environmental Conservation Engineering 52 (6), 313-320, 2024-11-20
Society of Environmental Conservation Engineering
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Details 詳細情報について
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- CRID
- 1390580018950718720
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- ISSN
- 18828590
- 03889459
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- Text Lang
- ja
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- Data Source
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- JaLC
- Crossref
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- Abstract License Flag
- Disallowed