{"product_id":"determination-of-caffeine-in-roasted-alemayehu-kiros-9783843378628","title":"Determination of Caffeine in Roasted Coffee Using Optical Method","description":"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.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eAuthor:\u003c\/b\u003e Alemayehu Kiros\u003cbr\u003e\u003cb\u003eISBN-10:\u003c\/b\u003e 3843378622\u003cbr\u003e\u003cb\u003eISBN-13:\u003c\/b\u003e 9783843378628\u003cbr\u003e\u003cb\u003ePublisher:\u003c\/b\u003e LAP Lambert Academic Publishing\u003cbr\u003e\u003cb\u003eLanguage:\u003c\/b\u003e English\u003cbr\u003e\u003cb\u003ePublished:\u003c\/b\u003e 11\/26\/2010\u003cbr\u003e\u003cb\u003ePages:\u003c\/b\u003e 56\u003cbr\u003e\u003cb\u003eFormat:\u003c\/b\u003e Paperback\u003cbr\u003e\u003cb\u003eWeight:\u003c\/b\u003e 0.21lbs\u003cbr\u003e\u003cb\u003eSize:\u003c\/b\u003e 9.00h x 6.00w x 0.13d","brand":"Alemayehu Kiros","offers":[{"title":"Paperback","offer_id":44079447802111,"sku":"9783843378628","price":52.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/2982\/9887\/files\/img_0361cac1-0aa9-4fd8-8013-82b4c70e4a5b.jpg?v=1685481197","url":"https:\/\/www.whiterainbookhouse.com\/products\/determination-of-caffeine-in-roasted-alemayehu-kiros-9783843378628","provider":"WR Book House","version":"1.0","type":"link"}