Statistical Evaluation of Water Activity Measurements Obtained with the Vaisala Humicap Humidity Meter

Authors

  • GUILLERMO FAVETTO,

    1. Authors Favetto and Chirife are affiliated with Depto. de Industrias and Author Ferro Fontán with Depto. de Fisica, Facultad de Ciencias Exactas y Naturales, Univ. de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina. Authors Favetto and Ferro Fontán are also members of Consejo National de Investigaciones Cientificas y Técnicas de la Republica Argentina. Author Resnik is a member of Comision de Investigaciones Cientificas de la Provincia de Buenos Aires.
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  • SILVIA RESNIK,

    1. Authors Favetto and Chirife are affiliated with Depto. de Industrias and Author Ferro Fontán with Depto. de Fisica, Facultad de Ciencias Exactas y Naturales, Univ. de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina. Authors Favetto and Ferro Fontán are also members of Consejo National de Investigaciones Cientificas y Técnicas de la Republica Argentina. Author Resnik is a member of Comision de Investigaciones Cientificas de la Provincia de Buenos Aires.
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  • JORGE CHIRIFE,

    1. Authors Favetto and Chirife are affiliated with Depto. de Industrias and Author Ferro Fontán with Depto. de Fisica, Facultad de Ciencias Exactas y Naturales, Univ. de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina. Authors Favetto and Ferro Fontán are also members of Consejo National de Investigaciones Cientificas y Técnicas de la Republica Argentina. Author Resnik is a member of Comision de Investigaciones Cientificas de la Provincia de Buenos Aires.
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  • CONSTANTINO FERRO FONTAN

    1. Authors Favetto and Chirife are affiliated with Depto. de Industrias and Author Ferro Fontán with Depto. de Fisica, Facultad de Ciencias Exactas y Naturales, Univ. de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina. Authors Favetto and Ferro Fontán are also members of Consejo National de Investigaciones Cientificas y Técnicas de la Republica Argentina. Author Resnik is a member of Comision de Investigaciones Cientificas de la Provincia de Buenos Aires.
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  • The authors acknowledge the financial support from the Subsecretaria de Estado de Ciencia y Tecnología de la República Argentina (Programa Nacional de Tecnología de Alimentos).

ABSTRACT

The objective of this study was to determine the suitability, precision and accuracy of the Vaisala Humicap electric hygrometer for aw measurements in the range 0.752-0.974 (at 25°C). Results of the statistical evaluation indicated that this hygrometer, when calibrated and operated as described here, provides a convenient and fast means of aw measurement having adequate accuracy and precision for most food applications.

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