{"product_id":"determination-of-caffeine-in-roasted-coffee-using-optical-method-paperback","title":"Determination of Caffeine in Roasted Coffee Using Optical Method - Paperback","description":"\u003cp\u003eby \u003cb\u003eAlemayehu Kiros\u003c\/b\u003e (Author)\u003c\/p\u003e\u003cp\u003eShorttitle 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.\u003c\/p\u003e\u003cdiv\u003e\n\u003cstrong\u003eNumber of Pages:\u003c\/strong\u003e 56\u003c\/div\u003e\u003cdiv\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 0.13 x 9 x 6 IN\u003c\/div\u003e\u003cdiv\u003e\n\u003cstrong\u003ePublication Date:\u003c\/strong\u003e November 26, 2010\u003c\/div\u003e","brand":"Books by splitShops","offers":[{"title":"Default Title","offer_id":42164958298247,"sku":"9783843378628","price":76.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0601\/2623\/2711\/files\/ef1c9f91e8c709851648f98d0603e1f3.webp?v=1733309867","url":"https:\/\/booksby.splitshops.com\/products\/determination-of-caffeine-in-roasted-coffee-using-optical-method-paperback","provider":"Books by splitShops","version":"1.0","type":"link"}