Articoli correlati a Determination of Caffeine in Roasted Coffee Using Optical...

Determination of Caffeine in Roasted Coffee Using Optical Method: Effect of roasting time on caffeine content, effect of roasting temperature on ... effect of temperature on pure caffeine - Brossura

Kiros, Alemayehu

 
9783843378628: Determination of Caffeine in Roasted Coffee Using Optical Method: Effect of roasting time on caffeine content, effect of roasting temperature on ... effect of temperature on pure caffeine

Sinossi

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 constant for chemical reactions at 2000 c were determined. The result shows weight loss increases during roasting. For pure caffeine molar decadic absorption coefficient and translational dipole moment were calculated.

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L'autore

Alemayehu Kiros Embaye, M.Sc degree in physics (Laser spectroscopy) from Addis Ababa University in 2007 and teaching undergraduate students at Dilla University department of physics and currently a PhD student at Addis Ababa University

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