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Assessing the CIO Automatic CO₂ Extractor

Siepman, D. (2012) Assessing the CIO Automatic CO₂ Extractor. Bachelor's Thesis, Physics.

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The Automatic CO₂ Extractor setup is designed to extract CO₂ from globally collected (sea)water samples. Extractions are performed by acidification and subsequent sparging of each sample with pure nitrogen. The CO₂ yield is measured in a calibrated volume and the CO₂ is stored for further isotope analysis. In the pursuit of an optimal extraction and storage sequence, elements of the ACE setup were subjected to tests. This thesis reports on several subjects concerning the operation of ACE. The latest design of the CO₂ cold trap turns out to be highly effective with regard to full capture of CO₂. Sparging rate and duration are recommended to be increased to respectively 20 litres/hour for 900 seconds. Advised is to adjust the amount of acidification to 1 ml of 85% orthophosphoric acid for each 250 ml of sample volume. ACE shows consistent yields when extracting from identical samples, both in absolute quantities as in isotope occurrence. The hardware was improved after detection of water vapour in the CO₂ calibration volume, by installing an extra water trap.

Item Type: Thesis (Bachelor's Thesis)
Degree programme: Physics
Thesis type: Bachelor's Thesis
Language: English
Date Deposited: 15 Feb 2018 07:52
Last Modified: 15 Feb 2018 07:52

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