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dc.contributor.authorKamonthip Sereenonchaien_US
dc.contributor.authorSaowapak Teerasongen_US
dc.contributor.authorSumonmarn Chan-Eamen_US
dc.contributor.authorPhoonthawee Saetearen_US
dc.contributor.authorNathawut Choengchanen_US
dc.contributor.authorKanchana Uraisinen_US
dc.contributor.authorNatchanon Amornthammarongen_US
dc.contributor.authorShoji Motomizuen_US
dc.contributor.authorDuangjai Nacaprichaen_US
dc.contributor.otherMahidol Universityen_US
dc.contributor.otherKing Mongkut's Institute of Technology Ladkrabangen_US
dc.contributor.otherNational Oceanic and Atmospheric Administrationen_US
dc.contributor.otherOkayama Universityen_US
dc.identifier.citationTalanta. Vol.81, No.3 (2010), 1040-1044en_US
dc.description.abstractThis work presents a flow analysis method for direct quantitation of calcium carbonate in cement without pretreatment of the sample. The method is based on online vaporization of CO2gas following acidification of the sample inside a small chamber that has a flow of acceptor solution passing around it. Solubilization of the CO2gas into the acceptor stream changes the conductivity of the acceptor solution causing an increase of signal at the capacitively coupled contactless conductivity detection (C4D) placed at the outlet of the vaporization chamber. This chamber is an adaption from previous work reported on 'membraneless vaporization' (MBL-VP). The method can be used in the quality control of production of mixed cement. These cement materials usually have calcium carbonate contents at high concentration range (e.g., 33-99% (w/w) CaCO3). Analysis of samples by this method is direct and convenient as it requires no sample pretreatment. The method is low-cost with satisfactory accuracy and acceptable precision. © 2010 Elsevier B.V.en_US
dc.rightsMahidol Universityen_US
dc.titleA low-cost method for determination of calcium carbonate in cement by membraneless vaporization with capacitively coupled contactless conductivity detectionen_US
Appears in Collections:Scopus 2006-2010

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