| CHEN Min,YANG Zhi,ZHANG Lei,QIU Yusheng,MA Qiang,HUANG Yipu. 2013. Determination of cosmogenic 32P and 33P in environmental samples. Acta Oceanologica Sinica, 32(6):18－25 |
| Determination of cosmogenic 32P and 33P in environmental samples |
| Determination of cosmogenic 32P and 33P in environmental samples |
| Received:March 09, 2012 Revised:May 14, 2012 |
| DOI：10.1007/s13131-013-0305-5 |
| Key words:32P 33P rainwater plankton sediments |
| 中文关键词: 32P 33P rainwater plankton sediments |
| 基金项目:The National Natural Science Foundation of China under contract No. 41125020; a special scientific research project for public welfare supported by the State Oceanic Administration under contract No. 2010050012-3. |
| Author Name | Affiliation | E-mail | | CHEN Min | College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China
State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361005, China | mchen@xmu.edu.cn | | YANG Zhi | College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China | | | ZHANG Lei | College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China | | | QIU Yusheng | College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China
State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361005, China | | | MA Qiang | College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China | | | HUANG Yipu | College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China | |
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| Abstract: |
| Understanding phosphorus dynamics in marine environment is of great importance, and appropriate tracers for phosphorus cycling in oceans are invaluable. In this study, two methods were developed for extraction, purification, and determination of naturally occurring 32P and 33P in rainwater, marine plankton and sediments using both a low-level beta counter (LBC) and an ultra-low-level liquid scintillation spectrometer (LSS). Blanks, chemical yields and counting efficiencies were quantified for both methods. The chemical purification of 32P and 33P separated by both procedures was validated by their decay curves. The absorber thickness of aluminum for LBC was assessed as 39.2 mg/cm2. 32P and 33P specific activities in some rain samples were determined by both methods and showed good consistent results. The advantage of the LSS over the LBC is apparent in its high counting efficiency and in determining samples with high concentration of stable phosphorus. However, when measuring environmental samples with low concentration of stable phosphorus, such as rainwater, both methods can be used and each has its distinct advantage. |
| 中文摘要: |
| Understanding phosphorus dynamics in marine environment is of great importance, and appropriate tracers for phosphorus cycling in oceans are invaluable. In this study, two methods were developed for extraction, purification, and determination of naturally occurring 32P and 33P in rainwater, marine plankton and sediments using both a low-level beta counter (LBC) and an ultra-low-level liquid scintillation spectrometer (LSS). Blanks, chemical yields and counting efficiencies were quantified for both methods. The chemical purification of 32P and 33P separated by both procedures was validated by their decay curves. The absorber thickness of aluminum for LBC was assessed as 39.2 mg/cm2. 32P and 33P specific activities in some rain samples were determined by both methods and showed good consistent results. The advantage of the LSS over the LBC is apparent in its high counting efficiency and in determining samples with high concentration of stable phosphorus. However, when measuring environmental samples with low concentration of stable phosphorus, such as rainwater, both methods can be used and each has its distinct advantage. |
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