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A New Approach to Carbonate Alkalinity
CERKO Sp. z o.o. Sp. K., Gdynia, Poland
Department of Oncology, The University Hospital in Cracow, Cracow, Poland
Department of Analytical Chemistry, The University of Seville, Seville, Spain
CERKO Sp. z o.o. Sp. K., Gdynia, Poland
CERKO Sp. z o.o. Sp. K., Gdynia, Poland
Faculty of Engineering and Chemical Technology, Cracow University of Technology, Cracow, Poland
- 1 CERKO Sp. z o.o. Sp. K., Gdynia, Poland
- 2 Department of Oncology, The University Hospital in Cracow, Cracow, Poland
- 3 Department of Analytical Chemistry, The University of Seville, Seville, Spain
- 4 CERKO Sp. z o.o. Sp. K., Gdynia, Poland
- 5 CERKO Sp. z o.o. Sp. K., Gdynia, Poland
- 6 Faculty of Engineering and Chemical Technology, Cracow University of Technology, Cracow, Poland
Journal of Analytical Sciences, Methods and Instrumentation·Volume 04 (2014)·Pages 62–69·Published 28 May 2014·DOI10.4236/jasmi.2014.42009
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Abstract
The article provides experimental data applied to the determination of carbonate alkalinity (CAM) according to modified Gran II functions. CAM is related to the mixtures NaHCO 3 + Na 2 CO 3 and Na 2 CO 3 + NaOH. In addition to the determination of equivalence volumes, one of the main novelties of the proposed method is the possibility of determining the activity coefficient of hydrogen ions ( γ ). Moreover, CAM can be used to calculate the dissociation constants (K 1 , K 2 ) for carbonic acid and the ionic product of water (K W ) from a single pH titration curve. The parameters of the related functions are calculated according to the least squares method.
KeywordsCarbonate AlkalinitypH TitrationMathematical Modelling
- Asuero, A.G. and Michalowski, T. (2011) Comprehensive Formulation of Titration Curves Referred to Complex Acid-Base Systems and Its Analytical Implications. Critical Reviews in Analytical Chemistry, 41, 151-187. http://dx.doi.org/10.1080/10408347.2011.559440
- Michalowski, T. and Asuero, A.G. (2012) New Approaches in Modelling the Carbonate Alkalinity and Total Alkalinity. Critical Reviews in Analytical Chemistry, 42, 220-244. http://dx.doi.org/10.1080/10408347.2012.660067
- Pilarski, B., Dobkowska, A., Foks, H. and Michalowski, T. (2010) Modeling of Acid-Base Equilibria in Binary-Solvent Systems: A Comparative Study. Talanta, 80, 1073-1080. http://dx.doi.org/10.1016/j.talanta.2009.07.033
- Sayago, A., Boccio, M. and Asuero, A.G. (2004) Fitting Straight Lines with Replicated Observations by Linear Regression: The Least Squares Postulates. Critical Reviews in Analytical Chemistry, 34, 39-50. http://dx.doi.org/10.1080/10408340490273744
- Asuero, A.G., Sayago, A. and González, A. (2006) The Correlation Coefficient: An Overview. Critical Reviews in Analytical Chemistry, 36, 41-59. http://dx.doi.org/10.1080/10408340500526766
- Michalowski, T., Pilarski, B., Asuero, A.G., Dobkowska, A. and Wybraniec, S. (2011) Determination of Dissociation Parameters of Weak Acids in Different Media According to the Isohydric Method. Talanta, 86, 447-451. http://dx.doi.org/10.1016/j.talanta.2011.09.002
- Inczédy, J. (1976) Analytical Applications of Complex Equilibria. Horwood, Chichester.
- Michalowski, T., Baterowicz, A., Madej, A. and Kochana, J. (2001) An Extended Gran Method and Its Applicability for Simultaneous Determination of Fe(II) and Fe(III). Analytica Chimica Acta, 442, 287-293. http://dx.doi.org/10.1016/S0003-2670(01)01172-2
- Michalowski, T., Toporek, M. and Rymanowski, M. (2005) Overview on the Gran and Other Linearization Methods Applied in Titrimetric Analyses. Talanta, 65, 1241-1253. http://dx.doi.org/10.1016/j.talanta.2004.08.053
- Michalowski, T., Kupiec, K. and Rymanowski, M. (2008) Numerical Analysis of the Gran Methods. A Comparative Study. Analytica Chimica Acta, 606, 172-183. http://dx.doi.org/10.1016/j.aca.2007.11.020
- Ponikvar, M., Michalowski, T., Kupiec, K., Wybraniec, S. and Rymanowski, M. (2008) Experimental Verification of the Modified Gran Methods Applicable to Redox Systems. Analytica Chimica Acta, 628, 181-189. http://dx.doi.org/10.1016/j.aca.2008.09.012