期刊文献+

Determination of cosmogenic ^(32)P and ^(33)P in environmental samples

Determination of cosmogenic ^(32)P and ^(33)P in environmental samples
下载PDF
导出
摘要 Understanding phosphorus dynamics in marine environment is of great importance, and appropriate trac- ers for phosphorus cycling in oceans are invaluable. In this study, two methods were developed for extrac- tion, 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 spectrome- ter (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. Understanding phosphorus dynamics in marine environment is of great importance, and appropriate trac- ers for phosphorus cycling in oceans are invaluable. In this study, two methods were developed for extrac- tion, 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 spectrome- ter (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.
出处 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2013年第6期18-25,共8页 海洋学报(英文版)
基金 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
关键词 ^32p ^33P RAINWATER PLANKTON SEDIMENTS ^32p, ^33P, rainwater, plankton, sediments
  • 相关文献

参考文献2

二级参考文献32

  • 1李学刚,宋金明,李宁,袁华茂,高学鲁.胶州湾沉积物中氮与磷的来源及其生物地球化学特征[J].海洋与湖沼,2005,36(6):562-571. 被引量:59
  • 2[1]Armstrong F. A. J. (1965) Phosphorus. In: Chemical Oceanography, Academic Press, London, pp. 56~87.
  • 3[2]Chen Qihuan, Yang Jiadong (1989) In: The Comprehensive Investigation and Research Report on Environmental Resource in the Central Part of the South China Sea, China Ocean Press, Beijing, pp.453~544.
  • 4[3]Claudia R. B. (2000) The bingeochemical cycling of phosphorus in marine system. Earth-Science Reviews, 51, 109~ 135.
  • 5[4]Fan Jiwei (1995) In: The Comprehensive Investigation and Research Report of the South China Sea (Ⅱ), China Ocean Press, Beijing, pp.317~329.
  • 6[5]Fonselius S. H. (1974) Phosphorus in the Black Sea. In: Black Sea-Geology, Chemistry and Biology, American Association of Petroleum Geologists, Tulsa, Okla. , 144pp.
  • 7[6]Han Wuying (1989) In: The Comprehensive Investigation and Research Report of Nansha Archipelago and Adjacent Area in the South China Sea (I), China Science Press, Beijing, pp. 402 ~ 407 .
  • 8[7]Han Wuying ( 1998 ) The Marine Chemistry of the South China Sea, China Science Press, Beijing, pp. 180~ 183.
  • 9[8]Karl D. M., K. Bjorkman, J. E. Dore, et al. (2001) Ecological nitrogen to phosphorous stoichiometry at Station ALOHA.Deep-Sea Res., 48(8-9), 1 529~1 566.
  • 10[9]Matheja J., E. T. Degens (1971) Structural Molecular Biology of Phosphates. G.Fischer, Stutgart. 4~105.

共引文献7

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部