Optimization of Sealed Tube Graphitization Method for Environmental C-14 Studies Using MICADAS

Rinyu, László; Molnár, Mihály; Major, István; Nagy, Tamás; Veres, Mihály; Kimák, Ádám; Wacker, Lukas; Synal, Hans-Arno

doi:10.1016/j.nimb.2012.08.042

Cited by 81 publications

(56 citation statements)

References 10 publications

(13 reference statements)

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“…The samples were prepared by the conventional acid-alkali-acid (AAA) treatment. Measured targets were prepared using a sealedtube graphitization method (Moln ar et al, 2013a; Rinyu et al, 2013).…”

Section: Ams Radiocarbon Analysismentioning

confidence: 99%

Bolătău sediment record – Chronology, microsedimentology and potential for a high resolution multimillennial paleoenvironmental proxy archive

Mîndrescu

Németh

Grădinaru

et al. 2016

Quaternary Geochronology

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a b s t r a c tFinely laminated sediment records have been studied from a small landslide-dammed lake (Bol at au) located in Bukovina, Romania. An age-depth model for the Bol at au sediment record was established based on 8 AMS radiocarbon dates from terrestrial macrofossils and the double peaks of the 137 Cs flux (i.e. mid-1960s: global fallout maximum; 1986: Chernobyl accident). The onset of the lacustrine sedimentation is estimated to~5e6.5 ka while the landslide event can be constrained by~6.8e7 ka as an inferior age estimate. The laminated structure is interpreted as organic and clastic type varvite at the lower and upper part of the core, respectively. Major fluctuations found in the coarsely sampled (5 cm) stable carbon isotope data showed remarkable correspondence with nearby palynological records and a lacustrine d 13 C record. It suggests that the sediment record preserves environmental signals with a broader regional relevance. The established timescale provides the necessary chronological basis of the records from Lake Bol at au for further analysis.

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Section: Ams Radiocarbon Analysismentioning

confidence: 99%

Bolătău sediment record – Chronology, microsedimentology and potential for a high resolution multimillennial paleoenvironmental proxy archive

Mîndrescu

Németh

Grădinaru

et al. 2016

Quaternary Geochronology

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“…Long-term stability of the instrument can be demonstrated via the variability of the Oxa-II normalization standard and the processed blank targets during the first half of 2012 ( Figure 5). All the measured targets were prepared using a refined sealed-tube graphitization method (Rinyu et al 2013). …”

Section: Resultsmentioning

confidence: 99%

EnvironMICADAS: A Mini 14C AMS with Enhanced Gas Ion Source Interface in the Hertelendi Laboratory of Environmental Studies (HEKAL), Hungary

Molnár¹

2013

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ABSTRACT.A more developed and modern technology replaced the old radiocarbon measuring methods in Hungary, based on isotope separation by accelerator mass spectrometry (AMS) and not on activity measurements. In summer 2011, the EnvironMICADAS was successfully installed in the Laboratory of HEKAL, Debrecen, Hungary. In this project, a multipurpose gas-handling system was developed for the gas ion source of EnvironMICADAS at ETH Zürich, designed for the measurement of small environmental origin samples (<50 g carbon) with moderate precision requirements. The ultimate aim is an automated device for high sample throughput. Since its final installation and first year of operation, over 2000 graphite targets were analyzed. Long-term stability of the instrument is confirmed through measurements of the Ox-II standard and processed blank targets during the first half of 2012.

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“…The sealed tube zinc-hydrogen reduction (used in combination of titanium-hydride and zinc reagents, TiH 2 -Zn method) graphitization method [6,7] is routinely used in AMS measurements in ATOMKI [8]. Recently we have adopted an alternative sealed tube method for 1 mg carbon sample size, where the zinc reagent is used as sole reduction agent (Zn-method) [9][10][11] and optimized it for the MICADAS AMS instrument (under publication).…”

Section: Methodsmentioning

confidence: 99%

Application of zinc sealed tube graphitization on sub-milligram samples using EnvironMICADAS

Rinyu

Orsovszki

Futó

et al. 2015

Nuclear Instruments and Methods in Physics Research Section B:

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Optimization of Sealed Tube Graphitization Method for Environmental C-14 Studies Using MICADAS

Cited by 81 publications

References 10 publications

Bolătău sediment record – Chronology, microsedimentology and potential for a high resolution multimillennial paleoenvironmental proxy archive

Bolătău sediment record – Chronology, microsedimentology and potential for a high resolution multimillennial paleoenvironmental proxy archive

EnvironMICADAS: A Mini 14C AMS with Enhanced Gas Ion Source Interface in the Hertelendi Laboratory of Environmental Studies (HEKAL), Hungary

Application of zinc sealed tube graphitization on sub-milligram samples using EnvironMICADAS

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