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 454950
Title Direct estimate of cocoa powder content in cakes by colorimetry and photoacoustic spectroscopy
Author(s) Doka, O.; Bicanic, D.D.; Kulcsar, R.
Source International Journal of Thermophysics 35 (2014)12. - ISSN 0195-928X - p. 2206 - 2214.
DOI https://doi.org/10.1007/s10765-014-1590-8
Department(s) Biophysics
VLAG
Publication type Refereed Article in a scientific journal
Publication year 2014
Keyword(s) phenolic content - theobroma-cacao - antioxidant - quantification - polyphenols - chocolate - capacity - beans - fat
Abstract Cocoa is a very important ingredient in the food industry and largely consumed worldwide. In this investigation, colorimetry and photoacoustic spectroscopy were used to directly assess the content of cocoa powder in cakes; both methods provided satisfactory results. The calibration curve was constructed using a series of home-made cakes containing varying amount of cocoa powder. Then, at a later stage, the same calibration curve was used to quantify the cocoa content of several commercially available cakes. For self-made cakes, the relationship between the PAS signal and the content of cocoa powder was linear while a quadratic dependence was obtained for the colorimetric index TeX (brightness) and total color difference
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