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Sediment Phosphorus Extractants for Phosphorus‐31 Nuclear Magnetic Resonance Analysis
Author(s) -
Ahlgren Joakim,
De Brabandere Heidi,
Reitzel Kasper,
Rydin Emil,
Gogoll Adolf,
Waldebäck Monica
Publication year - 2007
Publication title -
journal of environmental quality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 171
eISSN - 1537-2537
pISSN - 0047-2425
DOI - 10.2134/jeq2006.0235
Subject(s) - chemistry , ethylenediaminetetraacetic acid , sodium hydroxide , extraction (chemistry) , phosphorus , nuclear chemistry , sodium dithionite , sodium bicarbonate , sodium , hydroxide , yield (engineering) , inorganic chemistry , chelation , chromatography , organic chemistry , metallurgy , materials science
The influence of pre‐extractant, extractant, and post‐extractant on total extracted amounts of P and organic P compound groups measured with 31 P nuclear magnetic resonance ( 31 P‐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.