Articles liés à Determination of Caffeine in Roasted Coffee Using Optical...

Determination of Caffeine in Roasted Coffee Using Optical Method - Couverture souple

Kiros, Alemayehu

 
9783843378628: Determination of Caffeine in Roasted Coffee Using Optical Method

Synopsis

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.

Les informations fournies dans la section « Synopsis » peuvent faire référence à une autre édition de ce titre.

Présentation de l'éditeur

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.

Biographie de l'auteur

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

Les informations fournies dans la section « A propos du livre » peuvent faire référence à une autre édition de ce titre.