2020
DOI: 10.1590/1413-7054202044015820
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Do Aqua Regia and EPA 3051A methods underestimate the pseudo-total P content in clay soil fraction?

Abstract: It is common the use of 3051A and aqua regia methods to assess the pseudo-total and total P contents in soil and in its fractions. However, previous study has shown the formation of large amounts of short-range order materials (SRO) in the residues of these extractions. The objective of this work was to evaluate whether phosphate resorb in the SRO formed in the residue of 3051A and aqua regia extractions in clay soil fraction. Residues obtained from the 3051A and aqua regia were recovered from filter papers. T… Show more

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Cited by 3 publications
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“…Perchloric acid is known to be quite dangerous due to a chance of explosions caused by a buildup of perchloric acid or reactions with organic materials (Grimshaw, 1987;Idera et al, 2014;O' Halloran & Cade-Menun, 2008;Zhang & Kovar, 2000). All these methods can liberate the phosphorus trapped in silicate minerals which are rare and are not bioavailable for plant uptake (Church et al, 2017;Link et al, 1998;Melo & Guedes, 2020).…”
Section: Methods For Extracting Total Phosphorus In Soilmentioning
confidence: 99%
“…Perchloric acid is known to be quite dangerous due to a chance of explosions caused by a buildup of perchloric acid or reactions with organic materials (Grimshaw, 1987;Idera et al, 2014;O' Halloran & Cade-Menun, 2008;Zhang & Kovar, 2000). All these methods can liberate the phosphorus trapped in silicate minerals which are rare and are not bioavailable for plant uptake (Church et al, 2017;Link et al, 1998;Melo & Guedes, 2020).…”
Section: Methods For Extracting Total Phosphorus In Soilmentioning
confidence: 99%