Photoacoustic study of heated binary mixtures containing whey and skimmed-milk powders

O. Doka, D. Bicanic, R. Frankhuizen

Research output: Contribution to journalArticleProfessional


A novel methodology is proposed to determine the amount of whey powder in a binary mixture containing whey and skimmed-milk powders. This new approach is based on measurement of the amplitude of the photoacoustic (PA) signal obtained when the mixture is exposed to a controlled thermal treatment; the latter was shown to affect the colour of the powder. The limit of detection for the whey powder adulterant was 2% by weight. The PA and reflectance spectra (in the visible region) of the mixtures were also compared.
Original languageUndefined/Unknown
Pages (from-to)1-5
JournalZeitschrift für Lebensmittel-Untersuchung und -Forschung. A, Food research and technology
Publication statusPublished - 1999

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