117334 20230519145454.0 doi 10.1039/D1JA00046B sideral 125117 ART-2021-125117 eng Alvarez Penanes, P. Direct determination of Pb isotope ratios in archaeological materials by coupling liquid chromatography to multicollector ICP-MS 2021 Access copy available to the general public Unrestricted A procedure for the determination of Pb isotope ratios by coupling liquid chromatography to a multicollector ICP-MS has been developed. The procedure allows the direct injection of samples after dissolution without resorting to time-consuming off-line separation procedures. The separation of Pb from concomitant elements is carried out by anionic exchange as ethylenediamine tetraacetic acid (EDTA) chelates using EDTA and ammonium nitrate as a mobile phase. A flow injection system allows the injection of NIST 981 Pb isotopic standard, before and after the Pb peak from the sample, and the on-line addition of Tl for mass bias correction and bracketing. The procedure was validated by injecting NIST 981 into the chromatographic system and by comparing the results for real samples with the classical off-line separation procedure using Pb spec resins. The optimised procedure was applied to archaeological samples containing different concentrations of Pb. It was observed that the only limitation to the accuracy of the procedure was the concentration of Pb in the samples as no preconcentration is performed. Solid archaeological samples containing at least 500 μg g−1 of Pb can be studied using the proposed procedure. info:eu-repo/grantAgreement/ES/AEI/PGC2018-097961-B100 info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 4.351 2021 SPECTROSCOPY 7 / 43 = 0.163 2021 Q1 T1 CHEMISTRY, ANALYTICAL 23 / 87 = 0.264 2021 Q2 T1 0.795 2021 Spectroscopy 2021 Q1 Analytical Chemistry 2021 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Moldovan, M. Mederos, A. Martín Ramos, P. Universidad de Zaragoza (orcid)0000-0003-2713-2786 García Alonso, J. I. 5011 500 Universidad de Zaragoza Dpto. CC.Agrar.y Medio Natural Area Ingeniería Agroforestal 36, 8 (2021), 1694-1703 J. anal. at. spectrom. Journal of Analytical Atomic Spectrometry 0267-9477 1049052 http://zaguan.unizar.es/record/117334/files/texto_completo.pdf Postprint 2013594 http://zaguan.unizar.es/record/117334/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:117334 articulos driver 2023-05-18-14:48:42 ARTICLE