Transcription of Chemical Test for Caffeine
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Chemical Test for Caffeine
1 Christian Alliance S C Chan Memorial College/2013-14 Chemistry Olympiad/ Caffeine Hong Kong Chemistry Olympiad for Secondary Schools (2013-14) Chemical Test for Caffeine Christian Alliance S C Chan Memorial College Ho Chun Lok ( ) Kwok Man Kit ( ) Chan Kam Tung ( ) Tse Sze Ho ( ) 2 Christian Alliance S C Chan Memorial College/2013-14 Chemistry Olympiad/ Caffeine Contents Abstract .. 3 Objective .. 4 Principle .. 5-7 Solvent Extraction .. 5 Thin Layer Chromatography .. 5 Iodometric Back Titration .. 6 Spike Apparatus and Chemicals .. 8 Experimental Methods and Procedure .. 9-13 Solvent Extraction .. 9 Thin Layer Chromatography .. 11 Iodometric Back Titration .. 12 Spike test ..13 Result .. 14-18 Solvent Extraction.
hot water which is the normal concentration in brewing drinkable coffee). There is caffeine loss during the extraction process. Thus we carry out spike test to find out the percentage recovery of caffeine in raw coffee solution and distilled water after the solvent extraction process.
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