European Food Research and Technology

, Volume 219, Issue 4, pp 403–408 | Cite as

Kinematic viscosity and water activity of aqueous solutions of glycerol and sodium chloride

Original Paper


During osmotic dehydration, a removal of water from foodstuffs is achieved with a decrease in the water activity of the food sample. This dehydration process involves the utilization of highly concentrated solutions with one or several solutes that increase considerably the viscosity of the liquid phase. This property is fundamental in the studies of mass and momentum transfer processes. Glycerol and sodium chloride are studied as systems employed in this type of process due to the advantages for the final dehydrated product. Kinematic viscosities of binary and ternary aqueous solutions of these solutes were measured at various concentrations (from 0 to up 5.0 mol kg−1) and temperatures (from 20 up to 50 °C). Water activities for each indicated solution at 25 °C are also reported. Experimental data for both physical properties were simultaneously correlated with concentration and temperature for binary and ternary solutions with a suitable accuracy. Additionally, relationships between kinematic viscosities and water activities were established.


Binary and ternary solutions Rheology Water activity Equation of correlation 


  1. 1.
    Panagiotou N, Karathanos V, Maroulis Z (1999) Drying Technol 17(1–2):175–189Google Scholar
  2. 2.
    Falade K, Akinwale T, Adedokun O (2003) Eur Food Res Technol 216:500–504Google Scholar
  3. 3.
    Medina M, Sobral P, Hubinger M (2002) Chem Eng J 86:199–205CrossRefGoogle Scholar
  4. 4.
    Biswal R, Bozorgmerh K (1992) Trans ASAE 35(1):257–262Google Scholar
  5. 5.
    Sereno A, Moreira R, Martínez E (2001) J Food Eng 47:43–49CrossRefGoogle Scholar
  6. 6.
    Lerici C, Pinnavaia T, Dalla Rosa M, Bartolucci L (1985) J Food Sci 50:1217–1219, 1226Google Scholar
  7. 7.
    Ade-Omowaye B, Rastogi N, Angersbach A, Knorr D (2003) J Food Eng 60:89–98CrossRefGoogle Scholar
  8. 8.
    Tedjo W, Taiwo K, Eshtiaghi M, Knorr D (2002) J Food Eng 53:133–142CrossRefGoogle Scholar
  9. 9.
    Mavroudis N, Gekas V, Sjöholm I (1998) J Food Eng 35:191–209CrossRefGoogle Scholar
  10. 10.
    Giraldo G, Talens P, Fito P, Chiralt A (2003) J Food Eng 58:33–43CrossRefGoogle Scholar
  11. 11.
    Favetto G, Chirife J, Bartholomai G (1981) J Food Technol 16(6):609–619Google Scholar
  12. 12.
    Barbosa-Cánovas G, Vega-Mercado H. (1996) Dehydration of Foods. Champan & Hall, New York.Google Scholar
  13. 13.
    Chenlo F, Moreira R, Pereira G, Ampudia A (2002) J Food Eng 54:347–352CrossRefGoogle Scholar
  14. 14.
    Moreira R, Chenlo F, Pereira G (2003) J Food Eng 57:173–177CrossRefGoogle Scholar
  15. 15.
    Mazurkiewicz J, Tomasik P, Zaplotny J (2001) Food Hydrocolloid 15(1):43–46CrossRefGoogle Scholar
  16. 16.
    Anese M, Shtylla I, Torregiani D, Maltini E (1996) Thermochim Acta 275(1):131–137CrossRefGoogle Scholar
  17. 17.
    Chenlo F, Moreira R, Pereira G, Vázquez M.J (1997) J Chem Eng Data 42:93–97CrossRefGoogle Scholar
  18. 18.
    Stamp J, Linscott S, Lomauro C, Labuza T (1984) J Food Sci 49:1139–1142Google Scholar
  19. 19.
    Weast R (1987) CRC handbook of chemistry and physics, 67th edn. Chemical Rubber Company, Boca Raton, Fla.Google Scholar
  20. 20.
    Lide D (1992) CRC handbook of chemistry and physics, 73rd edn. Chemical Rubber Company, New YorkGoogle Scholar
  21. 21.
    Shankar P, Kumar M (1994) Proc R Soc London Ser A Math Phys Sci 444:573–581Google Scholar
  22. 22.
    Torok T, Rard J, Miller D (1993) Fluid Phase Equilibria 88:263–275CrossRefGoogle Scholar
  23. 23.
    Chirife J, Resnik S (1984) J Food Sci 49:1486–1488Google Scholar
  24. 24.
    Lerici C, Riva M, Dalla Rosa M (1983) J Food Sci 48:1667–1669Google Scholar
  25. 25.
    Lin D, Zhu Z, Mei L, Yang L (1996) J Chem Eng Data 41:1040–1042CrossRefGoogle Scholar
  26. 26.
    Comesaña J, Correa A, Sereno A (1999) J Chem Eng Data 44:1132–1134CrossRefGoogle Scholar

Copyright information

© Springer-Verlag 2004

Authors and Affiliations

  1. 1.Departamento de Enxeñería QuímicaUniversidade de Santiago de CompostelaSantiago de CompostelaSpain

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