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| Titel: |
Método higrométrico rápido para determinar actividad del agua |
| Auteur: |
Alemán , M.P. Placido , M. |
| Verschenen in: |
Ciencia y tecnologia alimentaria |
| Paginering: | Jaargang 3 (2002) nr. 4 pagina's 229-235 |
| Jaar: |
2002 |
| Inhoud: |
The kinetic to reach the equilibrium of relative humidity (ERH) in the atmosphere of an assay system was used to estimate the water activity of saturated solutions and fishery products. Relative humidity (RH) was controlled using a Thermohygrometer. Linearity was observed 20 min after the test started and corresponds to the following equation: 100/ RH=i+m(1/t); where "i" is intercept and "t" is time. For infinite time at equilibrium, equation changes to: 100/ERH=i; where ERH/100 is Aw value estimated. Accuracy and precision were evaluated using saturated solutions and fishery products. The difference between Aw obtained by the hygrometric method and by the interpolation method, ranged from -0.057 and 0.039 units of Aw. The mean absolute error was for hygrometric method 3.15% and 3.59% for the solutions and products, respectively. Accuracy of the hygrometric method is improved with appropriated sample weights for each type of product. © 2002 Altaga. All rights reserved. |
| Uitgever: |
Sociedad Mexicana de Nutrición y Tecnología de Alimentos (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 5 van 9 gevonden artikelen
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