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| Titel |
Determination of total carbonates in soil archaeometry using a new pressure method with temperature compensation |
| VerfasserIn |
Pantelis Barouchas, Vasilios Koulos, Vasilios Melfos |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250148555
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| Publikation (Nr.) |
 EGU/EGU2017-12820.pdf |
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| Zusammenfassung |
| For the determination of total carbonates in soil archaeometry a new technique was applied
using a multi-sensor philosophy, which combines simultaneous measurement of pressure and
temperature. This technology is innovative and complies with EN ISO 10693:2013, ASTM
D4373-02(2007) and Soil Science Society of America standard test methods for calcium
carbonate content in soils and sediments. The total carbonates analysis is based on a pressure
method that utilizes the FOGII Digital Soil CalcimeterTM, which is a portable apparatus.
The total carbonate content determined by treating a 1.000 g (+/- 0.001 g) dried
sample specimens with 6N hydrochloric acid (HCL) reagent grade, in an enclosed
reaction vessel. Carbon dioxide gas evolved during the reaction between the acid
and carbonate fraction of the specimen, was measured by the resulting pressure
generated, taking in account the temperature conditions during the reaction. Prior to
analysis the procedure was validated with Sand/Soil mixtures from BIPEA proficiency
testing program with soils of different origins. For applying this new method in
archaeometry a total number of ten samples were used from various rocks which are
related with cultural constructions and implements in Greece. They represent a large
range of periods since the Neolithic times, and were selected because there was an
uncertainty about their accurate mineralogical composition especially regarding the
presence of carbonate minerals. The results were compared to the results from ELTRA
CS580 inorganic carbon analyzer using an infrared cell. The determination of total
carbonates for 10 samples from different ancient sites indicated a very good correlation
(R2 >0.97) between the pressure method with temperature compensation and the
infrared method. The proposed method is quickly and accurate in archaeometry
and can replace easily other techniques for total carbonates testing. The FOGII
Digital Soil CalcimeterTM is portable and easily can be carried for field work in
archaeology. |
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