Journal article
Underway determination of dissolved inorganic carbon in estuarine waters by gas-diffusion flow analysis with C 4D detection
S Pencharee, PA Faber, PS Ellis, P Cook, J Intaraprasert, K Grudpan, ID McKelvie
Analytical Methods | ROYAL SOC CHEMISTRY | Published : 2012
DOI: 10.1039/c2ay25113b
Abstract
The development and evaluation of a gas diffusion flow analysis system for the underway determination of dissolved inorganic carbon in marine and estuarine waters is described. Carbon dioxide produced when sample is injected into an acidic donor stream, diffuses through an efficient hollow fibre microporous membrane into an acceptor stream of ultrapure water, where the resultant changes in electrical conductivity are detected using a contactless capacitively coupled conductivity detector (C 4D). The optimal parameters for the construction and operation of the C 4D system are reported. Under field operational conditions, the flow analysis method had a linear calibration range for DIC of 0.2-1..
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Funding Acknowledgements
Somkid Pencharee gratefully acknowledges support from for his visit to Monash University from the Thai Commission on Higher Education (CHE) under the PhD program "Strategic Scholarship for Frontier Research Network". Peter Faber thanks the Australian Department of Industry, Innovation, Science, Research and Tertiary Education for the support of an Australian Postgraduate Award.