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Radiocarbon 50 (3)
Title
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Title:
Radiocarbon 50 (3)
Series
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Series:
Radiocarbon
Volume
Volume number and part
Volume:
50 (3)
Number of Pages
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Number of Pages:
185
Publication Type
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Publication Type:
Journal
Year of Publication
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Year of Publication:
2008
Source
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Source:
BIAB (biab_online)
Relations
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Relations:
URI:
https://journals.uair.arizona.edu/index.php/radiocarbon/issue/view/162
Created Date
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Created Date:
12 Apr 2010
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Article Title
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Abstract
Sample dilution for AMS ¹â´C analysis of small samples (30'“150 μg C)
M De Rooij
Johannes Van der Plicht
H A J Meijer
413 - 436
By diluting samples up to a total weight of 200 μg, reliable AMS measurements can still be performed, and the success rate for targets that are difficult to measure can be significantly improved. A disadvantage of this dilution technique is a loss of measurement precision. In addition, calculations of the ¹â´C/¹²C isotope ratios and the uncertainties therein are not straightforward because of peculiarities in isotope fractionation processes in the AMS system. Therefore, to make sample dilution a routine method in our laboratory, extensive theoretical and experimental research to find the optimum conditions for all relevant parameters was carried out. Reports on the first detailed study dealing with all aspects of sample dilution. As an illustrative test case ¹â´C data for CO2 extracted from an ice core, from which samples of 35 μg C or less are available, is analysed.