Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 342149
Title Photoacoustic and optothermal studies of tomato ketchup adulterated by the Red Beet (Beta vulgaris)
Author(s) Bicanic, D.D.; Westra, E.; Setters, J.; Houten, S. van; Huberts, D.; Colic-Baric, I.
Source Journal de Physique IV France 125 (2005). - ISSN 1155-4339 - p. 807 - 811.
Department(s) Biophysics
Publication type Refereed Article in a scientific journal
Publication year 2005
Abstract Photoacoustic (PA) spectroscopy and optothermal window (OW) technique were used to explore their potential to detect red beet added as a colorant to tomato ketchup. The associated changes of colour resulting in the changes of absorbance (and hence of PA and OT signals) were monitored in the 500 nm region corresponding to the absorption maximum of lycopene. Both methods were shown capable of quantifying about 1% of red beet (by mass) in the mixture of ketchup and red beet.
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