{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,27]],"date-time":"2026-09-27T09:37:27Z","timestamp":1790501847643,"version":"4.1.0"},"reference-count":50,"publisher":"International Union of Crystallography (IUCr)","issue":"6","license":[{"start":{"date-parts":[[2018,10,22]],"date-time":"2018-10-22T00:00:00Z","timestamp":1540166400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/journals.iucr.org\/services\/copyrightpolicy.html"},{"start":{"date-parts":[[2018,10,22]],"date-time":"2018-10-22T00:00:00Z","timestamp":1540166400000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/journals.iucr.org\/services\/copyrightpolicy.html#TDM"}],"funder":[{"DOI":"10.13039\/501100001659","name":"Deutsche Forschungsgemeinschaft","doi-asserted-by":"publisher","award":["Pr 534\/6-2"],"award-info":[{"award-number":["Pr 534\/6-2"]}],"id":[{"id":"10.13039\/501100001659","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["iucr.org","wiley.com","iucrj.org"],"crossmark-restriction":true},"short-container-title":["J Synchrotron Rad","J Synchrotron Radiat"],"published-print":{"date-parts":[[2018,11,1]]},"abstract":"<jats:p>Phosphorus (P) <jats:italic>K<\/jats:italic>-edge X-ray absorption near-edge structure (XANES) spectra of orthophosphate (oPO<jats:sub>4<\/jats:sub>) bound to soil Fe<jats:sup>III<\/jats:sup> minerals (<jats:italic>e.g.<\/jats:italic> ferrihydrite, goethite) show a pre-edge signal at 2148\u20132152\u2005eV. It is unknown whether organic P bound to Fe<jats:sup>III<\/jats:sup> oxyhydroxides also show this feature. Otherwise, Fe-bound soil P may be underestimated by P <jats:italic>K<\/jats:italic>-edge XANES spectroscopy, because a large portion of Fe oxyhydroxide-bound P in soils is organic P. <jats:italic>K<\/jats:italic>-edge XANES spectra were obtained for different organic P compounds present in soils [inositol hexaphosphate (IHP), glucose-6-phosphate (G6P), adenosine triphosphate (ATP)] after sorption to ferrihydrite or goethite and compared with spectra of oPO<jats:sub>4<\/jats:sub> adsorbed to these minerals. P sorption to ferrihydrite increased in the sequence IHP \u226a G6P &lt; oPO<jats:sub>4<\/jats:sub> &lt; ATP. P sorption to goethite increased in the sequence G6P &lt; oPO<jats:sub>4<\/jats:sub> \u226a ATP = IHP. Pre-edge signals in P <jats:italic>K<\/jats:italic>-edge XANES spectra of organic P adsorbed to Fe oxyhydroxides were markedly smaller compared with those of oPO<jats:sub>4<\/jats:sub> adsorbed to these minerals and absent for Fe<jats:sup>III<\/jats:sup> oxyhydroxide-bound ATP as well as goethite-bound IHP. Linear combination fitting (LCF) performed on spectra of IHP, G6P or ATP adsorbed to ferrihydrite or goethite, using only spectra of Fe<jats:sup>III<\/jats:sup> oxyhydroxide-bound oPO<jats:sub>4<\/jats:sub> as reference compounds for Fe-bound P, erroneously assigned &gt;93% (ferrihydrite) or &gt;41% (goethite) of Fe-bound P to non-Fe-bound P species. Inclusion of Fe<jats:sup>III<\/jats:sup> oxyhydroxide-bound IHP as reference compounds markedly increased the recovery of oxyhydroxide-bound organic P. Thus, Fe-bound soil P has probably often been underestimated by LCF in soil XANES studies where IHP adsorbed to ferrihydrite and to goethite were not included as reference compounds.<\/jats:p>","DOI":"10.1107\/s1600577518013334","type":"journal-article","created":{"date-parts":[[2018,10,22]],"date-time":"2018-10-22T15:35:16Z","timestamp":1540222516000},"page":"1736-1744","update-policy":"https:\/\/doi.org\/10.1107\/cm_01","source":"Crossref","is-referenced-by-count":22,"title":["Phosphorus <i>K<\/i>-edge XANES spectroscopy has probably often underestimated iron oxyhydroxide-bound P in soils"],"prefix":"10.1107","volume":"25","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5536-5777","authenticated-orcid":true,"given":"J\u00f6rg","family":"Prietzel","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wantana","family":"Klysubun","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"329","published-online":{"date-parts":[[2018,10,22]]},"reference":[{"key":"hf5935_bb1","doi-asserted-by":"crossref","first-page":"255","DOI":"10.1007\/s10533-015-0178-0","volume":"127","author":"Achat","year":"2016","journal-title":"Biogeochemistry"},{"key":"hf5935_bb2","doi-asserted-by":"crossref","first-page":"1079","DOI":"10.2136\/sssaj2016.10.0342","volume":"81","author":"Adam","year":"2017","journal-title":"Soil Sci. 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