63064 20200221144231.0 doi 10.1007/s00216-016-9331-4 sideral 100314 ART-2016-100314 eng Gomez-Gonzalez, Miguel Ángel Combining single-particle inductively coupled plasma mass spectrometry and X-ray absorption spectroscopy to evaluate the release of colloidal arsenic from environmental samples 2016 Access copy available to the general public Unrestricted Detection and sizing of natural colloids involved in the release and transport of toxic metals and metalloids is essential to understand and model their environmental effects. Single-particle inductively coupled plasma mass spectrometry (SP-ICP-MS) was applied for the detection of arsenic-bearing particles released from mine wastes. Arsenic-bearing particles were detected in leachates from mine wastes, with a mass-per-particle detection limit of 0.64 ng of arsenic. Conversion of the mass-per-particle information provided by SP-ICP-MS into size information requires knowledge of the nature of the particles; therefore, synchrotron-based X-ray absorption spectroscopy (XAS) was used to identify scorodite (FeAsO4·2H2O) as the main species in the colloidal particles isolated by ultrafiltration. The size of the scorodite particles detected in the leachates was below 300–350 nm, in good agreement with the values obtained by TEM. The size of the particles detected by SP-ICP-MS was determined as the average edge of scorodite crystals, which show a rhombic dipyramidal form, achieving a size detection limit of 117 nm. The combined use of SP-ICP-MS and XAS allowed detection, identification, and size determination of scorodite particles released from mine wastes, suggesting their potential to transport arsenic. info:eu-repo/grantAgreement/ES/MINECO/CGL2010-17434 info:eu-repo/grantAgreement/ES/MINECO/CTQ2012-38091-C02-01 info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 3.431 2016 CHEMISTRY, ANALYTICAL 16 / 76 = 0.211 2016 Q1 T1 BIOCHEMICAL RESEARCH METHODS 26 / 77 = 0.338 2016 Q2 T2 0.99 2016 Analytical Chemistry 2016 Q1 Biochemistry 2016 Q2 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion (orcid)0000-0001-5382-0561 Bolea, Eduardo Universidad de Zaragoza O’Day, Peggy A. Garcia-Guinea, Javier Garrido, Fernando (orcid)0000-0002-4169-0357 Laborda, Francisco Universidad de Zaragoza 2009 750 Universidad de Zaragoza Dpto. Química Analítica Área Química Analítica 408, 19 (2016), 5125–5135 Anal. Bioanal. Chem. Analytical and Bioanalytical Chemistry 1618-2642 6505723 http://zaguan.unizar.es/record/63064/files/texto_completo.pdf Postprint 34493 http://zaguan.unizar.es/record/63064/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:63064 articulos driver 2020-02-21-13:19:41 ARTICLE