Czech J. Food Sci., 2010, 28(1):36-43 | DOI: 10.17221/218/2009-CJFS

Comparison of hazes in freshly bottled and aged beers by multiple angle turbidimetry

Petr Sladký, Robert Koukol
Department of Chemical Physics and Optics, Faculty of Mathematics and Physics, Charles University in Prague, Prague, Czech Republic

The hazes of freshly bottled and aged pale lager beers determined with the 12° and 90° dual angle laboratory hazemeters and 10° to 90° range photogoniometer were compared and evaluated. The instruments were standardised in EBC formazin units. In freshly bottled beer, the forward (12°-25°) haze values were smaller approximately by a factor of three than the nephelometric (90°) values which yielded 0.33 EBC units. In aged beer, the forward haze was greater than the nephelometric one. Whereas the aged beer showed the greatest and the fresh beer the lowest intensity of scattered light, the formazin suspension intensity was in between. Due to the standardisation of the beer scattered intensities by relation to that of formazin, the standardised nephelometric haze in non-aged beer was greater than the forward haze, and vice versa in aged beer. The greater forward than the nephelometric haze in aged beer was caused by the growth of haze particles above the mean size of formazin particles which was larger than 2 μm as confirmed by the particle size distribution measurement.

Keywords: beer; ageing; haze; multi-angle turbidimetry

Published: February 28, 2010  Show citation

ACS AIP APA ASA Harvard Chicago Chicago Notes IEEE ISO690 MLA NLM Turabian Vancouver
Sladký P, Koukol R. Comparison of hazes in freshly bottled and aged beers by multiple angle turbidimetry. Czech J. Food Sci. 2010;28(1):36-43. doi: 10.17221/218/2009-CJFS.
Share...
Download citation
  • BibTeX (.bib)
  • Bookends (.ris)
  • EasyBib (.ris)
  • EndNote (.enw)
  • EndNote 8 (.xml)
  • ISI WoS (.isi)
  • Medlars (.medlars)
  • Mendeley (.ris)
  • MODS (.xml)
  • Papers (.ris)
  • RefWorks (.txt)
  • RefManager (.ris)
  • RIS (.ris)
  • MS Word (.xml)
  • Zotero (.ris)
    • Open full article

    References

    1. Analytica-EBC (1997): Method 9.29, Haze in beer: calibration of haze meters; 9.30, Prediction of shelf-life of beer. Brauerei und Getränke Rundschau. 5th Ed. Fachverlag Hans Carl, Nürenberg.
    2. Buckee G.K., Morris T.M., Bailey T.P. (1986): Calibration and evaluation of haze meters. Journal of the Institute of Brewing, 92: 475-482. Go to original source...
    3. Clark D.T., Bamforth Ch.W. (2007): Realistic haze specifications for beer. MBAA - Technical Quarterly, 44(3): 160-163. Go to original source...
    4. Čejka P., Kellner V., Čulík J., Horák T., Jurková M. (2004): Characterizing a Czech-type beer. Kvasný Průmysl, 50: 3-11. Go to original source...
    5. Ebie K., Yamaguchi D., Hoshikava H., Shirozu T. (2006): New measurement principle and basic performance of high-sensitivity turbidimeter with two optical systems in series. Water Research, 40: 683-691. Go to original source... Go to PubMed...
    6. Jones A.R. (1999): Light scattering for particle characterization. Progress in Energy and Combustion Science, 25: 1-53. Go to original source...
    7. Klimowitz R.J., Byrnes J. (1994): Frühzeitige Erkennung der späterer Flocken Bildung in Bier Einsatz eines Zweiwinkel Trübungs-Messgaretes. Brauwelt, 134: 2052-2055.
    8. Kratochvil P. (1987): Classical Light Scattering from Polymer Solutions. Elsevier, Amsterdam, Oxford, New York.
    9. Morris T.M. (1984): Particle size analyses of beer solids using a Coulter Counter. Journal of the Institute of Brewing, 90: 162-166. Go to original source...
    10. Morris T.M. (1987): The relationship between haze and the size of particles in beer. Journal of the Institute of Brewing, 93: 13-17. Go to original source...
    11. Mundy A.P., Boley N. (1999): A survey of instrumentation used for the determination of haze in beer. Journal of the Institute of Brewing, 105: 75-78. Go to original source...
    12. Sladký P. (2005): Improvements of the EBC-Analytica Methods for the prediction of shelf-life of beer. In: Proceedings of the European Brewery Convention 30th Congress, Prague (CD-ROM). Fachverlag Heinz Carl, Nürenberg: 860-876.
    13. Sladký P., Císařová H., Kellner V. (2004): Measurement of HGB beer colloidal ageing and tannoid content development using complex turbidimetric analysis. Kvasný Průmysl, 50: 130-134. Go to original source...
    14. Smythe J.E., O'Mahony M.A., Bamforth C.W. (2002): The impact of the appearance of beer on its perception. Journal of the Institute of Brewing, 108(1): 37-42. Go to original source...
    15. Webster R.D.J. (1983): Haze measurements. In: Proceedings of the European Brewery Convention 19th Congress, London. Fachverlag Heinz Carl, Nürenberg: 579-586.
    16. Wyatt P.J. (1993): Light scattering and the absolute characterization of macromolecules. Analytica Chimica Acta, 272: 1-40. Go to original source...

    This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International (CC BY NC 4.0), which permits non-comercial use, distribution, and reproduction in any medium, provided the original publication is properly cited. No use, distribution or reproduction is permitted which does not comply with these terms.


    Return to the content