The desorption isotherms of two durable meat products (sample 1 - durable fermented meat product and sample 2 - unheated durable meat product) by Dynamic Dewpoint Isotherm (DDI) at 20, 25, and 30 °C and Saturated Salt Slurry (SSS) method at 20 °C has been studied. The data acquired from these measurements for 7 models (GAB, DLP, Henderson, Chin, Smith, Oswin, Halsey) were used and statistically evaluated. Based on our collected data, the most suitable model for these types of durable meat products is the DLP model. For the DDI method, DLP model (20-30 °C) reached the R2 = 0.999, P value 3.48-4.22 of sample 1 and R2 = 0.999, P value 1.51-3.24 of sample 2. For SSS method DLP model (20 °C) reached R2 = 0.999, P value 4.23 of sample 1 and R2 = 0.998, P value 3.68 of sample 2. The most commonly used GAB model according to statistical treatment was very accurate only for the DDI method, GAB model (20-30 °C) reached R2 ≥ 0.994, P value 1.93-7.12 of sample 1 and R2 = 0.999, P value 1.76-5.54 of sample 2. In general, for DDI method for both samples have models (DLP, GAB, Halsey, Henderson, and Oswin) a P value of less than 10% for all three measured temperatures. For the SSS method, only the DLP and Henderson models are below 10% for both samples. It has been verified that the DDI method is a suitable and accurate method for measuring desorption isotherms for durable meat products.

University of Chemistry and Technology Faculty of Chemical Engineering Department of Chemical Engineering; Technická 5 166 28 Prague 6 Dejvice Czech Republic

University of Chemistry and Technology Faculty of Food and Biochemical Technology; Department of Food Preservation; Technická 5 166 28 Prague 6 Dejvice Czech Republic

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Ahmat T., Bruneau D., Kuitche A., Aregba A.W. Desorption isotherms for fresh beef: an experimental and modeling approach. Meat Sci. 2014;96:1417–1424. PubMed

Al-Muhtaseb A.H., McMinn W.A.M., Magee T.R.A. Moisture sorption isotherm characteristics of food products: a review. Food Bioprod. Process. 2002;80(2):118–128.

Anderson R.B. Modification of the BET equation. J. Am. Chem. Soc. 1946;68:686–691.

AOAC . thirteenth ed. Association of Official Analytical Chemists; Washington, DC: 1980. Official Methods of Analysis; pp. 376–384.

Astiasarán I., Ansorena D. Encyclopedia of Food and Health; 2016. Sausages and Comminuted Products: Dry Fermented Products.

Aviara N.A. ItechOpen; 2020. Moisture Sorption Isotherms and Isotherm Model Performance Evaluation for Food and Agricultural Products.

Aykin-Dinçer E., Erbaş M. Drying kinetics, adsorption isotherms and quality characteristics of vakuum-dried beef slices with different salt contents. Meat Sci. 2018;145:114–120. PubMed

Berk Z. Elsevier/Academic Press; 2009. Food Process Engineering and Technology.

Boquet R., Chirife J., Iglesias H.A. Equations for fitting water sorption isotherms of food. Part II. Evaluation of various two-parameter models. J. Food Technol. 1978;13:319–328.

Caballero-Cerón C., Guerrero-Beltrán J.A., Mújica-Paz H., Torres J.A., Welti-Chanes J. In: Water Stress in Biological, Chemical, Pharmaceutical and Food Systems. Gutiérrez-López G.F., Alamilla-Beltrán L., del Pilar Buera M., Welti-Chanes J., Parada-Arias E., Barbosa-Cánovas G.V., editors. Springer; New York: 2015. Moisture sorption isotherms of foods: experimental methodology, mathematical analysis, and practical applications; pp. 187–214.

Condon J.B. Elsevier; Amsterdam: 2006. Surface Area and Porosity Determinations by Physisorption: Measurements and Theory.

Costa-Corredor A., Pakowski Z., Lenczewski T., Gou P. Simulation of simultaneous water and salt diffusion in dry fermented sausages by the Stefan-Maxwell equation. J. Food Eng. 2010;97(3):311–318.

de Boer J.H. Clarendon Press; Oxford, UK: 1953. The Dynamical Character of Adsorption.

Delgado A.E., Sun D.W. Desorption isotherms for cooked and cured beef and pork. J. Food Eng. 2002;51:163–170.

Delgado A.E., Sun D.W. Desorption isotherms and glass transition temperature for chicken meat. J. Food Eng. 2002;55:1–8.

Fontana A.J., Carter B.P. 2020. Measurement of water activity, moisture sorption isotherm, and moisture content of foods; pp. 207–226. Barbora-Cánovas, V., Fontana Jr., A.J., Schmidt, S.J., Labuza T.P. (Eds.), Water Activity in Foods.

Grandison A., Brennan J.G. second ed. Vol. 1. 2011. Food Processing Handbook.

Guggenheim E.A. Clarendon Press; Oxford, UK: 1966. Application of Statistical Mechanics.

Halsey G. Physical adsorption on non-uniform surfaces. J. Chem. Phys. 1948;16:931–937.

Henderson S.M. A basic concept of equilibrium moisture content. Agric. Eng. 1952;33(2):931–937.

Jena S., Das H. Moisture sorption studies on vacuum dried coconut presscake. J. Food Sci. Technol. 2012;49(5):638–642. PubMed PMC

Kabil E., Aktaş N., Balcı E. Effect of sodium chloride, sodium nitrite and temperature on desorption isotherms of previously frozen beef. Meat Sci. 2012;90:932–938. PubMed

Leroy F., Verluyten J., De Vuyst L. Functional meat starter cultures for improved sausage fermentation. Int. J. Food Microbiol. 2006;106(3):270–285. PubMed

Lewicki P.P., Pomaranska-Lazuka W. Errors in static desiccator method of water sorption isotherms estimation. Int. J. Food Prop. 2003;6(3):557–563.

Lin J., Nurtama B. Moisture sorption isotherm characteristics of taro flour. World J. Dairy Food Sci. 2010;5(1):1–6.

Marcos B., Gou P., Arnau J., Dolors Guàrdia M., Comaposada J. Co-extruded alginate as an alternative to collagen casings in the production of dry-fermented sausages: impact of coating composition. Meat Sci. 2020;169:108–184. PubMed

Marques R.C.D., Oliveira É.R., Coutinho G.S.M., Ribeiro A.E. Ch., Teixeira C.S., Soares Júnior M., Caliari M. Modeling sorption properties of maize by-products obtained using the Dynamic Dewpoint Isotherm (DDI) method. Food Biosci. 2020;38:725–738.

Mathlouthi M., Rogé B. Water vapour sorption isotherms and the caking of food powders. Food Chem. 2003;82(1):61–71.

Muñoz I., Arnau J., Costa-Corredor A., Gou P. Desorption isotherms of salted minced pork using K-lactate as a substitute for NaCl. Meat Sci. 2009;83(4):642–646. PubMed

Ndob A.M., Lebert A. Prediction of pH and aw of pork meat by a thermodynamic model: new developments. Meat Sci. 2018;138:59–67. PubMed

Nielsen S.S. Springer US; 2010. Food Analysis Laboratory Manual.

Decree No. 69/2016 Coll. Czech republic, 2016. Decree on requirements for meat, meat product, fishery and aquaculture products and products thereof, eggs and products thereof; Ministry of Agriculture: Prague, Czech Republic. Collection of laws Czech Republic. 2016;26:714–759. http://www.eagri.cz/public/web/mze/[2021-09-11 Also available at:

Oswin C.R. The kinetics of package life. III. The isotherm. J. Chem. Ind. 1946;65:419–421. London.

Polatoğlu B., Beşe A.V., Kaya M., Aktaş N. Moisture adsorption isotherms and thermodynamics properties of sucuk (Turkish dry-fermented sausage) Food Bioprod. Process. 2011;89(4):449–456.

Romani S., Rocculi P., Tappi S., Dalla Rosa M. Moisture adsorption behaviour of biscuit during storage investigated by using a new Dynamic Dewpoint method. Food Chem. 2016;195:97–103. PubMed

Ščetar M., Kovačić E., Kurek M., Galić K. Shelf life of packaged sliced dry fermented sausage under different temperature. Meat Sci. 2013;93:802–809. PubMed

Schmidt S.J., Lee J.W. Comparison between water vapor sorption isotherms obtained using the new dynamic Dewpoint isotherm method and those obtained using the standard saturated salt Slurry method. Int. J. Food Prop. 2012;15(2):236–248.

Smith S.E. The sorption of water vapour by high polymers. J. Am. Chem. Soc. 1947;69:646–651. PubMed

Toldrá F. Food & Nutrition Press; 2004. Dry-cured Meat Products.