LIBROS DEL AUTOR: alemayehu kiros

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  • Determination of Caffeine in Roasted Coffee Using Optical Method
    Alemayehu Kiros
    Shorttitle In this work a simultaneous determination of caffeine content was performed in sample of Sidama (Ethiopia) coffee, before and after roasting at either different temperature (140-2100c) or different exposure time (4-10min). A UV/VIS spectrophotometer method is used. A modest loss of caffeine was verified both in the roasting time and roasting temperature. Rate constan...
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