Continuous-flow analysis of nitrogen compounds in environmental water using a copper–zinc reduction coil
The copper–cadmium reduction method has been applied to determine nitrogen compounds in heavily contaminated environmental water. However, there is an international demand to reduce the use of cadmium because it is harmful to humans and environment. Hence, a copper–zinc reduction continuous flow ana...
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| Language: | English |
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Elsevier
2024-12-01
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| Series: | Talanta Open |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666831924000924 |
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| author | Satoshi Morikubo Nodoka Takahashi Yorihiro Kumazawa Yasuhiko Takuma Daisuke Enomoto Takashi Nishimura Ryosei Kanno Suguru Okunishi Hiroto Maeda |
| author_facet | Satoshi Morikubo Nodoka Takahashi Yorihiro Kumazawa Yasuhiko Takuma Daisuke Enomoto Takashi Nishimura Ryosei Kanno Suguru Okunishi Hiroto Maeda |
| author_sort | Satoshi Morikubo |
| collection | DOAJ |
| description | The copper–cadmium reduction method has been applied to determine nitrogen compounds in heavily contaminated environmental water. However, there is an international demand to reduce the use of cadmium because it is harmful to humans and environment. Hence, a copper–zinc reduction continuous flow analysis system without using cadmium was developed for nitrogen-compound determination. However, the effects of seawater contaminants on this analytical method remains unknown. Therefore, in this study, the effects of contaminants on the developed method are investigated, and the applicability of the method to environmental water analysis is examined. Resultantly, interference due to magnesium precipitation is confirmed; however, this could be prevented by adjusting the concentration of the analytical reagent, i.e.,. ethylenediaminetetraacetic acid disodium. The measurement of certified reference materials under the new conditions, with precipitation countermeasures, show good results, with an accuracy of over 96 %. Additionally, a recovery study using actual environmental water afforded good results, with recovery of >95 % for all samples. These results indicate that the proposed method is an excellent, cadmium-free analytical method capable of analyzing environmental water as effectively as conventional methods. |
| format | Article |
| id | doaj-art-42513374a8304bcb99aae5abc0da5a52 |
| institution | DOAJ |
| issn | 2666-8319 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Talanta Open |
| spelling | doaj-art-42513374a8304bcb99aae5abc0da5a522025-08-20T02:50:13ZengElsevierTalanta Open2666-83192024-12-011010037810.1016/j.talo.2024.100378Continuous-flow analysis of nitrogen compounds in environmental water using a copper–zinc reduction coilSatoshi Morikubo0Nodoka Takahashi1Yorihiro Kumazawa2Yasuhiko Takuma3Daisuke Enomoto4Takashi Nishimura5Ryosei Kanno6Suguru Okunishi7Hiroto Maeda8Department of Research and Development, Tokyo Metropolitan Industrial Technology Research Institute, 2-4-10, Aomi, Koutou-ku, Tokyo 135-0064, Japan; The United Graduate School of Agricultural Sciences, Kagoshima University, 1-21-24, Korimoto, Kagoshima 890-8580, Japan; Corresponding author at: Department of Research and Development, Tokyo Metropolitan Industrial Technology Research Institute, 2-4-10, Aomi, Koutou-ku, Tokyo 135-0064, Japan.BL TEC K.K., 14-15 Nihonbashi-odemmacho, Chuo-ku, Tokyo 103-0011, JapanBL TEC K.K., 14-15 Nihonbashi-odemmacho, Chuo-ku, Tokyo 103-0011, JapanDepartment of Research and Development, Tokyo Metropolitan Industrial Technology Research Institute, 2-4-10, Aomi, Koutou-ku, Tokyo 135-0064, JapanDepartment of Research and Development, Tokyo Metropolitan Industrial Technology Research Institute, 2-4-10, Aomi, Koutou-ku, Tokyo 135-0064, JapanBL TEC K.K., 14-15 Nihonbashi-odemmacho, Chuo-ku, Tokyo 103-0011, JapanBL TEC K.K., 14-15 Nihonbashi-odemmacho, Chuo-ku, Tokyo 103-0011, JapanThe United Graduate School of Agricultural Sciences, Kagoshima University, 1-21-24, Korimoto, Kagoshima 890-8580, Japan; Faculty of Fisheries, Kagoshima University, 4-50-20 Shimoarata, Kagoshima City, Kagoshima 890-0056, JapanFaculty of Fisheries, Kagoshima University, 4-50-20 Shimoarata, Kagoshima City, Kagoshima 890-0056, JapanThe copper–cadmium reduction method has been applied to determine nitrogen compounds in heavily contaminated environmental water. However, there is an international demand to reduce the use of cadmium because it is harmful to humans and environment. Hence, a copper–zinc reduction continuous flow analysis system without using cadmium was developed for nitrogen-compound determination. However, the effects of seawater contaminants on this analytical method remains unknown. Therefore, in this study, the effects of contaminants on the developed method are investigated, and the applicability of the method to environmental water analysis is examined. Resultantly, interference due to magnesium precipitation is confirmed; however, this could be prevented by adjusting the concentration of the analytical reagent, i.e.,. ethylenediaminetetraacetic acid disodium. The measurement of certified reference materials under the new conditions, with precipitation countermeasures, show good results, with an accuracy of over 96 %. Additionally, a recovery study using actual environmental water afforded good results, with recovery of >95 % for all samples. These results indicate that the proposed method is an excellent, cadmium-free analytical method capable of analyzing environmental water as effectively as conventional methods.http://www.sciencedirect.com/science/article/pii/S2666831924000924Nitrogen compoundsEnvironmental waterContinuous flow analysisCopper–zinc reduction methodCadmium-free |
| spellingShingle | Satoshi Morikubo Nodoka Takahashi Yorihiro Kumazawa Yasuhiko Takuma Daisuke Enomoto Takashi Nishimura Ryosei Kanno Suguru Okunishi Hiroto Maeda Continuous-flow analysis of nitrogen compounds in environmental water using a copper–zinc reduction coil Talanta Open Nitrogen compounds Environmental water Continuous flow analysis Copper–zinc reduction method Cadmium-free |
| title | Continuous-flow analysis of nitrogen compounds in environmental water using a copper–zinc reduction coil |
| title_full | Continuous-flow analysis of nitrogen compounds in environmental water using a copper–zinc reduction coil |
| title_fullStr | Continuous-flow analysis of nitrogen compounds in environmental water using a copper–zinc reduction coil |
| title_full_unstemmed | Continuous-flow analysis of nitrogen compounds in environmental water using a copper–zinc reduction coil |
| title_short | Continuous-flow analysis of nitrogen compounds in environmental water using a copper–zinc reduction coil |
| title_sort | continuous flow analysis of nitrogen compounds in environmental water using a copper zinc reduction coil |
| topic | Nitrogen compounds Environmental water Continuous flow analysis Copper–zinc reduction method Cadmium-free |
| url | http://www.sciencedirect.com/science/article/pii/S2666831924000924 |
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