Passive Sampling for Accurate 87Sr/86Sr Isotope Ratio Analysis by MC-ICP-MS in Amazonian Rivers

Antonia Siebenbrunner; Stefan Wagner; Amauri Antonio Menegário; Thomas Prohaska; José Lucas Martins Viana; Luiz Felipe Pompeu Prado Moreira; Ézio Sargentini Jr.; Johanna Irrgeher

Passive Sampling for Accurate ⁸⁷Sr/⁸⁶Sr Isotope Ratio Analysis by MC-ICP-MS in Amazonian Rivers

Antonia Siebenbrunner
, Stefan Wagner
, Amauri Antonio Menegário
, Thomas Prohaska
, José Lucas Martins Viana
, Luiz Felipe Pompeu Prado Moreira
, Ézio Sargentini Jr.
, Johanna Irrgeher

Lehrstuhl für Allgemeine und Analytische Chemie (120)

São Paulo State University (UNESP)
Instituto Nacional de Pesquisas da Amazônia (INPA)

Publikation: Konferenzbeitrag › Poster › Forschung › Begutachtung

Abstract

The Amazon river basin presents challenging conditions for strontium (Sr) isotope ratio analysis due to extremely low Sr concentrations, high Rb/Sr ratios, and low ionic strength. This contribution applies a diffusive gradients in thin films (DGT) passive sampling method to assess Sr concentrations and ⁸⁷Sr/⁸⁶Sr isotope ratios in Amazonian rivers. Laboratory tests and in situ deployments in the Rio Negro, Solimões, and Amazon River show that DGT enables accurate Sr quantification and ⁸⁷Sr/⁸⁶Sr isotope ratio assessment, achieving up to 16-fold Sr preconcentration
without inducing detectable isotopic fractionation. The method captures large spatial and seasonal ⁸⁷Sr/⁸⁶Sr isotope ratio variability linked to Amazon basin geodiversity. Binary mixing at the confluence of Rio Negro and Solimões was confirmed. DGT passive sampling proved to be a robust tool for ⁸⁷Sr/⁸⁶Sr analysis in dynamic freshwater environments, even under extreme hydrochemical conditions.

Originalsprache	Englisch
Publikationsstatus	Veröffentlicht - März 2026
Veranstaltung	57th Annual Conference of the DGMS: Including ICP-MS User's Meeting - University of Leipzig, Leipzig, Deutschland Dauer: 10 März 2026 → 13 März 2026 https://dgms-conference.com/

Konferenz

Konferenz	57th Annual Conference of the DGMS
Land/Gebiet	Deutschland
Ort	Leipzig
Zeitraum	10/03/26 → 13/03/26
Internetadresse	https://dgms-conference.com/

Passive Sampling for Accurate ⁸⁷Sr/⁸⁶Sr Isotope Ratio Analysis by MC-ICP-MS in Amazonian Rivers
Siebenbrunner, A., Wagner, S., Menegário, A. A., Prohaska, T., Viana, J. L. M., Pompeu Prado Moreira, L. F., Sargentini Jr., É. & Irrgeher, J., 30 Jan. 2026.
Publikation: Konferenzbeitrag › Abstract/Zusammenfassung › Begutachtung

57th Annual Conference of the DGMS
Wagner, S. (Gastredner/-in), Irrgeher, J. (Sitzungsleiter/-in), Siebenbrunner, A. (Redner/-in) & Trimmel, S. (Redner/-in)
10 März 2026 → 13 März 2026
Aktivität: Teilnahme an oder Organisation einer Veranstaltung › Konferenzteilnahme

Dieses zitieren

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title = "Passive Sampling for Accurate 87Sr/86Sr Isotope Ratio Analysis by MC-ICP-MS in Amazonian Rivers",

abstract = "The Amazon river basin presents challenging conditions for strontium (Sr) isotope ratio analysis due to extremely low Sr concentrations, high Rb/Sr ratios, and low ionic strength. This contribution applies a diffusive gradients in thin films (DGT) passive sampling method to assess Sr concentrations and 87Sr/86Sr isotope ratios in Amazonian rivers. Laboratory tests and in situ deployments in the Rio Negro, Solim{\~o}es, and Amazon River show that DGT enables accurate Sr quantification and 87Sr/86Sr isotope ratio assessment, achieving up to 16-fold Sr preconcentration without inducing detectable isotopic fractionation. The method captures large spatial and seasonal 87Sr/86Sr isotope ratio variability linked to Amazon basin geodiversity. Binary mixing at the confluence of Rio Negro and Solim{\~o}es was confirmed. DGT passive sampling proved to be a robust tool for 87Sr/86Sr analysis in dynamic freshwater environments, even under extreme hydrochemical conditions.",

author = "Antonia Siebenbrunner and Stefan Wagner and Meneg{\'a}rio, \{Amauri Antonio\} and Thomas Prohaska and Viana, \{Jos{\'e} Lucas Martins\} and \{Pompeu Prado Moreira\}, \{Luiz Felipe\} and \{Sargentini Jr.\}, {\'E}zio and Johanna Irrgeher",

year = "2026",

month = mar,

language = "English",

note = "57th Annual Conference of the DGMS ; Conference date: 10-03-2026 Through 13-03-2026",

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T1 - Passive Sampling for Accurate 87Sr/86Sr Isotope Ratio Analysis by MC-ICP-MS in Amazonian Rivers

AU - Siebenbrunner, Antonia

AU - Wagner, Stefan

AU - Menegário, Amauri Antonio

AU - Prohaska, Thomas

AU - Viana, José Lucas Martins

AU - Pompeu Prado Moreira, Luiz Felipe

AU - Sargentini Jr., Ézio

AU - Irrgeher, Johanna

PY - 2026/3

Y1 - 2026/3

N2 - The Amazon river basin presents challenging conditions for strontium (Sr) isotope ratio analysis due to extremely low Sr concentrations, high Rb/Sr ratios, and low ionic strength. This contribution applies a diffusive gradients in thin films (DGT) passive sampling method to assess Sr concentrations and 87Sr/86Sr isotope ratios in Amazonian rivers. Laboratory tests and in situ deployments in the Rio Negro, Solimões, and Amazon River show that DGT enables accurate Sr quantification and 87Sr/86Sr isotope ratio assessment, achieving up to 16-fold Sr preconcentration without inducing detectable isotopic fractionation. The method captures large spatial and seasonal 87Sr/86Sr isotope ratio variability linked to Amazon basin geodiversity. Binary mixing at the confluence of Rio Negro and Solimões was confirmed. DGT passive sampling proved to be a robust tool for 87Sr/86Sr analysis in dynamic freshwater environments, even under extreme hydrochemical conditions.

AB - The Amazon river basin presents challenging conditions for strontium (Sr) isotope ratio analysis due to extremely low Sr concentrations, high Rb/Sr ratios, and low ionic strength. This contribution applies a diffusive gradients in thin films (DGT) passive sampling method to assess Sr concentrations and 87Sr/86Sr isotope ratios in Amazonian rivers. Laboratory tests and in situ deployments in the Rio Negro, Solimões, and Amazon River show that DGT enables accurate Sr quantification and 87Sr/86Sr isotope ratio assessment, achieving up to 16-fold Sr preconcentration without inducing detectable isotopic fractionation. The method captures large spatial and seasonal 87Sr/86Sr isotope ratio variability linked to Amazon basin geodiversity. Binary mixing at the confluence of Rio Negro and Solimões was confirmed. DGT passive sampling proved to be a robust tool for 87Sr/86Sr analysis in dynamic freshwater environments, even under extreme hydrochemical conditions.

M3 - Poster

T2 - 57th Annual Conference of the DGMS

Y2 - 10 March 2026 through 13 March 2026

ER -

Passive Sampling for Accurate 87Sr/86Sr Isotope Ratio Analysis by MC-ICP-MS in Amazonian Rivers

Abstract

Konferenz

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