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Determination and speciation of phosphorus in fertilizers and mineral supplements by cattle by X-ray absorption near edge structure spectroscopy: a simple nondestructive method

Abstract

X-ray absorption near-edge structure (XANES) spectroscopy was an excellent analytical tool for determining the direct speciation of phosphorus in complex matrices as agricultural inputs. The use of linear combination fitting (LCF), principal component analysis (PCA) and partial least squares (PLS) enabled the development of a simple nondestructive method for quantitatively determining different species of phosphorus in fertilizers and mineral supplement for cattle. Three classes of samples containing phosphite, phosphate and both species were classified using PCA. The LCF is an interesting strategy of qualitative and quantitative analysis in chemical speciation by XANES spectroscopy. Using LCF, the trueness of phosphite and phosphate species added in the samples was in the 96-113% range. Strong matrix effects in the mechanism of X-ray absorption for P K-edge XANES prevented the determination of the phosphorus species in the fertilizers (trueness 65-121% range) and mineral supplements for cattle (trueness 12-48% range) using PLS models.

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Publication details

The article was received on 12 Dec 2018, accepted on 10 Feb 2019 and first published on 11 Feb 2019


Article type: Paper
DOI: 10.1039/C8AY02704H
Citation: Anal. Methods, 2019, Accepted Manuscript

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    Determination and speciation of phosphorus in fertilizers and mineral supplements by cattle by X-ray absorption near edge structure spectroscopy: a simple nondestructive method

    D. V. Babos, J. P. Castro, D. Andrade, V. Costa and E. R. Pereira-Filho, Anal. Methods, 2019, Accepted Manuscript , DOI: 10.1039/C8AY02704H

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