Sediment Phosphorus Extractants for Phosphorus-31 Nuclear Magnetic Resonance Analysis: A Quantitative Evaluation
2007 (English)In: Journal of Environmental Quality, ISSN 0047-2425, Vol. 36, no 3, 892-898 p.Article in journal (Refereed) Published
The influence of pre-extractant, extractant, and post-extractant on total extracted amounts of P and organic P compound groups measured with 31P nuclear magnetic resonance (31P-NMR) in lacustrine sediment was examined. The main extractants investigated were sodium hydroxide (NaOH) and sodium hydroxide ethylenediaminetetraacetic acid (NaOH-EDTA) with bicarbonate buffered dithionite (BD) or EDTA as pre-extractants. Post extractions were conducted using either NaOH or NaOH-EDTA, depending on the main extractant. Results showed that the most efficient combination of extractants for total P yield was NaOH with EDTA as pre-extractant, yielding almost 50% more than the second best procedure. The P compound groups varying the most between the different extraction procedures were polyphosphates and pyrophosphates. NaOH with BD as pre-extractant was the most efficient combination for these compound groups.
Place, publisher, year, edition, pages
2007. Vol. 36, no 3, 892-898 p.
IdentifiersURN: urn:nbn:se:uu:diva-94217DOI: 10.2134/jeq2006.0235ISI: 000246430500028PubMedID: 17485721OAI: oai:DiVA.org:uu-94217DiVA: diva2:167992