02013nam a2200253 a 4500 vtls000067873 KUKTEM 20251114204526.0 121219t2012 my a f m 000 0 eng d THE0004057(Local) 201905160858 fauzi 201212191633 Fida UMP TP156.E8 N67 2012 rs Bc. Norhamizah Johari Batch extraction of 1,3,7-trymethylxanthine from KKM22 cocoa seeds / Norhamizah Johari Kuantan, Pahang : UMP, 2012 xiii, 38 p. : ill. ; 30 cm. + 1 CD-ROM Project paper (Bachelor of Chemical Engineering) -- Universiti Malaysia Pahang - 2012 Bibliography : p. 27-29 1,3,7- trymethylxanthine (caffeine) is a naturally occurring substance found in cocoa seeds. The purpose of this research is to extract caffeine from Klon Koko Malaysia (KKM)22, to investigate the effect of particle size, solvent/feed ratio and extraction time, and also to determine the kinetic model for extraction of 1,3,7-trymethylxantine. The sample was prepared by grinding and sieving, followed by solid-liquid extraction using water by heat reflux extracting technique, liquid-liquid extraction with ethyl acetate, drying of caffeine by rotary evaporator, and finally analysis of the caffeine yield. The analysis of the caffeine yield was done using UV/Vis Spectrophotometric method. The caffeine yield was highest at sample particle size of 315 μm (0.22 % w/w caffeine or 2.1724 mg/g cocoa), solvent/feed ratio of 1:1 (0.22 % w/w caffeine or 2,2102 mg/g cocoa), and extraction time of 90 minutes (0.23 % w/w caffeine or 2.288 mg/g cocoa). The best conditions for the highest yield of caffeine from KKM22 were 315 μm of sample particle size, 1:1 of solvent/feed ratio, and 90 minutes of extraction time. Extraction (Chemistry) Caffeine 0 0 0 1 10000 10000 2019-09-04 0 TP156.E8 N67 2012 rs Bc. 0000068540 2019-09-04 00:00:00 1 2019-09-04 PSM 0 0 0 1 10000 10000 2019-09-04 0 CD 6486 | TP156.E8 N67 2012 rs Bc. 0000068541 2019-09-04 00:00:00 1 2019-09-04 PSM VIRTUA40 3542 3548 VTLSSORT0080*0200*0400*0900*1000*2450*2600*3000*5020*5040*5200*6500*6501*9992