%0 Journal Article
%A Colocho Hurtarte, Luis Carlos
%A Santana Amorim, Helen Carla
%A Kruse, Jens
%A Criginski Cezar, Julio
%A Klysubun, Wantana
%A Prietzel, Jörg
%T A Novel Approach for the Quantification of Different Inorganic and Organic Phosphorus Compounds in Environmental Samples by P L 2,3 -Edge X-ray Absorption Near-Edge Structure (XANES) Spectroscopy
%J Environmental science & technology
%V 54
%N 5
%@ 1520-5851
%C Columbus, Ohio
%I American Chemical Society
%M FZJ-2020-04425
%P 2812 - 2820
%D 2020
%X Phosphorus (P) is an essential element for life on Earth, with an important and oftentimes unaccounted organic biogeochemical component. Current methods for the quantification of different organic P compounds in environmental samples (e.g., soils, sediments) are based on extraction techniques and often associated with incomplete P recovery or sample changes. In this study, we present a protocol for the quantification of different organic and inorganic P species in soils using synchrotron-based X-ray absorption near-edge structure (XANES) spectroscopy at the P L2,3-edge. Its accuracy and precision was evaluated by analyzing 40 standard mixtures composed of seven different inorganic and organic P compounds (with a mean of R2 = 0.85). In addition, we quantified the P species of two soils and two agro-industrial byproducts using P L2,3-edge XANES spectroscopy and the results were compared with those obtained by P K-edge XANES or 31P NMR spectroscopy. Using the P L2,3-edge, we identified different organic P species, including those not identified by the common P K-edge XANES. However, there is a consistent underestimation of organic polyphosphates. Overall, the application of P L2,3-edge XANES provides a higher level of information than by P K-edge XANES, although the ubiquitous use of this novel methodology is still limited to samples with a phosphorus content above 3 mg g–1.
%F PUB:(DE-HGF)16
%9 Journal Article
%$ 32068384
%U <Go to ISI:>//WOS:000518235100027
%R 10.1021/acs.est.9b07018
%U https://juser.fz-juelich.de/record/887795