HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Ahlgren, J. Articles by Waldebäck, M. Search for Related Content PubMed PubMed Citation Articles by Ahlgren, J. Articles by Waldebäck, M. Agricola Articles by Ahlgren, J. Articles by Waldebäck, M. Related Collections Nuclear Magnetic Resonance, NMR Phosphorus

TECHNICAL REPORTS

Wetlands and Aquatic Processes

Sediment Phosphorus Extractants for Phosphorus-31 Nuclear Magnetic Resonance Analysis

A Quantitative Evaluation

^a Dep. of Physical and Analytical Chemistry, Analytical Chemistry, Uppsala Univ., Box 599, 751 24 Uppsala, Sweden
^b Inst. of Biology, Univ. of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark
^c Dep. of Biochemistry and Organic Chemistry, Organic Chemistry, Uppsala Univ., Box 599, 751 24 Uppsala, Sweden
^d Dep. of Ecology and Evolution, Limnology, Uppsala Univ., Box 573, 751 23 Uppsala, Sweden

^* Corresponding author (Monica.Waldeback{at}kemi.uu.se)

Received for publication June 20, 2006. 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.