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Characterization of...
Characterization of phosphorus in sequential extracts from lake sediments using P-31 nuclear magnetic resonance spectroscopy
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Reitzel, Kasper (author)
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- Ahlgren, Joakim (author)
- Uppsala universitet,Analytisk kemi
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- Gogoll, Adolf (author)
- Uppsala universitet,Organisk kemi I
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Jensen, Henning S. (author)
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- Rydin, Emil (author)
- Uppsala universitet,Limnologi
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(creator_code:org_t)
- Univ So Denmark, Inst Biol, DK-5230 Odense M, Denmark. Univ Uppsala, Dept Analyt Chem, S-75124 Uppsala, Sweden. Univ Uppsala, Dept Organ Chem, S-75124 Uppsala, Sweden. Uppsala Univ, Dept Ecol & Evolut, EBC, S-75236 Uppsala, Sweden. 2006
- 2006
- English.
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In: Canadian Journal of Fisheries and Aquatic Sciences. - Univ So Denmark, Inst Biol, DK-5230 Odense M, Denmark. Univ Uppsala, Dept Analyt Chem, S-75124 Uppsala, Sweden. Univ Uppsala, Dept Organ Chem, S-75124 Uppsala, Sweden. Uppsala Univ, Dept Ecol & Evolut, EBC, S-75236 Uppsala, Sweden.. - 0706-652X .- 1205-7533. ; 63:8, s. 1686-1699
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https://doi.org/10.1...
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Abstract
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- Phosphorus (P) compounds in three different lake surface sediments were extracted by sequential P extraction and identified by P-31 nuclear magnetic resonance (P-31 NMR) spectroscopy. The extraction procedure primarily discriminates between inorganic P-binding sites but most extraction steps also contained P not reacting (nrP) with the molybdenum complex during P analyses. In all three lakes, the nrP dominated in the NaOH extracts. Nonreactive P from the dystrophic lake was dominated by potentially recalcitrant P groups such as orthophosphate monoesters, while the nrP in the two more productive lakes also contained polyphosphates, pyrophosphate, and organic P groups such as P lipids and DNA-P that may be important in remineralization and recycling to the water column. In addition, polyphosphates showed substantial dynamics in settling seston. The Humic-P pools (P associated with humic acids) showed strong signals of orthophosphate monoesters in all three lakes, which supported the assumption that P-containing humic compounds are indeed recovered in this fraction, although other organic P forms are also present. Thus, in addition to expanding the understanding of which organic P forms that are present in lake sediments, the P-31 NMR technique also demonstrated that the chemical extraction procedure may provide some quantification of recalcitrant versus labile organic P forms.
Subject headings
- NATURVETENSKAP -- Biologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences (hsv//eng)
Keyword
- limnologi
- Limnology
- Biology
Publication and Content Type
- ref (subject category)
- art (subject category)
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