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Verfasst von:Welte, Caroline [VerfasserIn]   i
 Fohlmeister, Jens [VerfasserIn]   i
Titel:Laser ablation - Accelerator mass spectrometry
Titelzusatz:An approach for rapid radiocarbon analyses of carbonate archives at high spatial resolution
Verf.angabe:Caroline Welte, Lukas Wacker, Bodo Hattendorf, Marcus Christl, Jens Fohlmeister, Sebastian F.M. Breitenbach, Laura F. Robinson, Allen H. Andrews, André Freiwald, Jesse R. Farmer, Christiane Yeman, Hans-Arno Synal, and Detlef Günther
E-Jahr:2016
Jahr:16 August 2016
Umfang:7 S.
Titel Quelle:Enthalten in: Analytical chemistry
Ort Quelle:Columbus, Ohio : American Chemical Society, 1947
Jahr Quelle:2016
Band/Heft Quelle:88(2016), 17, Seite 8570-8576
ISSN Quelle:1520-6882
Abstract:A new instrumental setup, combining laser ablation (LA) with accelerator mass spectrometry (AMS), has been investigated for the online radiocarbon (14C) analysis of carbonate records. Samples were placed in an in-house designed LA-cell, and CO2 gas was produced by ablation using a 193 nm ArF excimer laser. The 14C/12C abundance ratio of the gas was then analyzed by gas ion source AMS. This configuration allows flexible and time-resolved acquisition of 14C profiles in contrast to conventional measurements, where only the bulk composition of discrete samples can be obtained. Three different measurement modes, i.e. discrete layer analysis, survey scans, and precision scans, were investigated and compared using a stalagmite sample and, subsequently, applied to terrestrial and marine carbonates. Depending on the measurement mode, a precision of typically 1-5% combined with a spatial resolution of 100 μm can be obtained. Prominent 14C features, such as the atomic bomb 14C peak, can be resolved by scanning several cm of a sample within 1 h. Stalagmite, deep-sea coral, and mollusk shell samples yielded comparable signal intensities, which again were comparable to those of conventional gas measurements. The novel LA-AMS setup allowed rapid scans on a variety of sample materials with high spatial resolution.
DOI:doi:10.1021/acs.analchem.6b01659
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

Volltext: https://doi.org/10.1021/acs.analchem.6b01659
 DOI: https://doi.org/10.1021/acs.analchem.6b01659
Datenträger:Online-Ressource
Sprache:eng
K10plus-PPN:1700655337
Verknüpfungen:→ Zeitschrift

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