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Zurich University of Applied Science

 

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NIRS of chocolate and its chemometric analysis

11 January 2013 | By Jürgen Stohner, Brenno Zucchetti, Fabian Deuber and Fabian Hobi, ZHAW Zurich University of Applied Sciences, ICBC Institute of Chemistry and Biological Chemistry and Bernhard Lukas and Manfred Suter, Max Felchlin AG

In today’s modern society, chocolate has been established as a premium lifestyle food product. Besides oil and coffee, cocoa is one of the most valuable commodities of global trade. About four per cent of cocoa beans traded on the world market originate from the noble criollo bean and are the…

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Progress on coffee roasting: A process control tool for a consisten roast degree – roast after roast

4 July 2012 | By Chahan Yeretzian, Flurin Wieland & Alexia N. Gloess, Zurich University of Applied Science, Institute of Chemistry and Biological Chemistry and Marco Keller, Andreas Wetzel & Stefan Schenker, Bühler AG

A real-time automated process control tool for coffee roasting was developed to consistently and accurately achieve a targeted roast degree. It is based on timeresolved on-line monitoring of volatile organic compounds (VOC) in the off-gas of a drum roaster, using Proton-Transfer-Reaction Time-of-Flight Mass-Spectrometry (PTR-TOF-MS). These experiments provide a detailed, real-time…