Influence on the Chemistry Quenching of Low Level Tritium in Natural Water by the Solid Polymer Electrolysis Enrichment Method
The Solid Polymer Electrolysis (SPE) enrichment method is a practical way to measure low level tritium (<1 Bq/m3) in natural water samples. However, the concentrated liquid samples are acidified by impurity ions from water samples or the process of water sample pretreatment with a SPE electrolysi...
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| Format: | Article |
| Language: | English |
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Science Press, PR China
2016-08-01
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| Series: | Yankuang ceshi |
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| Online Access: | http://www.ykcs.ac.cn/en/article/doi/10.15898/j.cnki.11-2131/td.2016.04.013 |
| _version_ | 1811168544332709888 |
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| author | LAN Gao-yong WANG Hua YU Jian-guo YING Qi-he TANG Wei YANG Hui |
| author_facet | LAN Gao-yong WANG Hua YU Jian-guo YING Qi-he TANG Wei YANG Hui |
| author_sort | LAN Gao-yong |
| collection | DOAJ |
| description | The Solid Polymer Electrolysis (SPE) enrichment method is a practical way to measure low level tritium (<1 Bq/m3) in natural water samples. However, the concentrated liquid samples are acidified by impurity ions from water samples or the process of water sample pretreatment with a SPE electrolysis device, which results in perturbation when liquid scintillation is added progressively to the concentrated liquid. Consequently, the radioactive activity of tritium will be lower than the reference value because of the chemistry quenching effect occurring in the measurement process. The influence of chemistry quenching caused by impurity ions, pH value and electrical conductivity of the low level tritium samples in the tritium measurement results are discussed in this paper. The results show that, to avoid the chemistry quenching caused by impurity ions deposited in SPE electrolysis device and improve the accuracy of measurement counting, it is necessary to keep the pH value neutral and the electrical conductivity ≤1 μS/cm. Using the ion and acid-base hybrid exchange resin column separates impurity ions for high electrical conductivity (>1 μS/cm) or acidification pH samples. For water samples the impurity ions taken by the polymer film, can be used to adjust the pH value with tiny amounts of ammonia to avoid chemistry quenching and thus reduce the low counting of the tritium natural water samples. |
| first_indexed | 2024-04-10T16:27:56Z |
| format | Article |
| id | doaj.art-59a56d1b25da46ddae5475991ac81a77 |
| institution | Directory Open Access Journal |
| issn | 0254-5357 |
| language | English |
| last_indexed | 2024-04-10T16:27:56Z |
| publishDate | 2016-08-01 |
| publisher | Science Press, PR China |
| record_format | Article |
| series | Yankuang ceshi |
| spelling | doaj.art-59a56d1b25da46ddae5475991ac81a772023-02-09T01:25:55ZengScience Press, PR ChinaYankuang ceshi0254-53572016-08-0135441541910.15898/j.cnki.11-2131/td.2016.04.013ykcs-35-4-415Influence on the Chemistry Quenching of Low Level Tritium in Natural Water by the Solid Polymer Electrolysis Enrichment MethodLAN Gao-yong0WANG Hua1YU Jian-guo2YING Qi-he3TANG Wei4YANG Hui5Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin 541004, ChinaInstitute of Karst Geology, Chinese Academy of Geological Sciences, Guilin 541004, ChinaInstitute of Karst Geology, Chinese Academy of Geological Sciences, Guilin 541004, ChinaInstitute of Karst Geology, Chinese Academy of Geological Sciences, Guilin 541004, ChinaInstitute of Karst Geology, Chinese Academy of Geological Sciences, Guilin 541004, ChinaInstitute of Karst Geology, Chinese Academy of Geological Sciences, Guilin 541004, ChinaThe Solid Polymer Electrolysis (SPE) enrichment method is a practical way to measure low level tritium (<1 Bq/m3) in natural water samples. However, the concentrated liquid samples are acidified by impurity ions from water samples or the process of water sample pretreatment with a SPE electrolysis device, which results in perturbation when liquid scintillation is added progressively to the concentrated liquid. Consequently, the radioactive activity of tritium will be lower than the reference value because of the chemistry quenching effect occurring in the measurement process. The influence of chemistry quenching caused by impurity ions, pH value and electrical conductivity of the low level tritium samples in the tritium measurement results are discussed in this paper. The results show that, to avoid the chemistry quenching caused by impurity ions deposited in SPE electrolysis device and improve the accuracy of measurement counting, it is necessary to keep the pH value neutral and the electrical conductivity ≤1 μS/cm. Using the ion and acid-base hybrid exchange resin column separates impurity ions for high electrical conductivity (>1 μS/cm) or acidification pH samples. For water samples the impurity ions taken by the polymer film, can be used to adjust the pH value with tiny amounts of ammonia to avoid chemistry quenching and thus reduce the low counting of the tritium natural water samples.http://www.ykcs.ac.cn/en/article/doi/10.15898/j.cnki.11-2131/td.2016.04.013natural watertritiumsolid polymer electrolysis enrichmentchemistry quenching effectph valueelectrical conductivity |
| spellingShingle | LAN Gao-yong WANG Hua YU Jian-guo YING Qi-he TANG Wei YANG Hui Influence on the Chemistry Quenching of Low Level Tritium in Natural Water by the Solid Polymer Electrolysis Enrichment Method Yankuang ceshi natural water tritium solid polymer electrolysis enrichment chemistry quenching effect ph value electrical conductivity |
| title | Influence on the Chemistry Quenching of Low Level Tritium in Natural Water by the Solid Polymer Electrolysis Enrichment Method |
| title_full | Influence on the Chemistry Quenching of Low Level Tritium in Natural Water by the Solid Polymer Electrolysis Enrichment Method |
| title_fullStr | Influence on the Chemistry Quenching of Low Level Tritium in Natural Water by the Solid Polymer Electrolysis Enrichment Method |
| title_full_unstemmed | Influence on the Chemistry Quenching of Low Level Tritium in Natural Water by the Solid Polymer Electrolysis Enrichment Method |
| title_short | Influence on the Chemistry Quenching of Low Level Tritium in Natural Water by the Solid Polymer Electrolysis Enrichment Method |
| title_sort | influence on the chemistry quenching of low level tritium in natural water by the solid polymer electrolysis enrichment method |
| topic | natural water tritium solid polymer electrolysis enrichment chemistry quenching effect ph value electrical conductivity |
| url | http://www.ykcs.ac.cn/en/article/doi/10.15898/j.cnki.11-2131/td.2016.04.013 |
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