000			02013nam a2200253 a 4500
001			vtls000067873
003			KUKTEM
005			20251114204526.0
008			121219t2012 my a f m 000 0 eng d
020			_aTHE0004057(Local)
039		9	_a201905160858 _bfauzi _y201212191633 _zFida
040			_aUMP
090			_aTP156.E8 N67 2012 rs Bc.
100	0		_aNorhamizah Johari
245	1	0	_aBatch extraction of 1,3,7-trymethylxanthine from KKM22 cocoa seeds / _cNorhamizah Johari
260			_aKuantan, Pahang : _bUMP, _c2012
300			_axiii, 38 p. : _bill. ; _c30 cm. + _e1 CD-ROM
502			_aProject paper (Bachelor of Chemical Engineering) -- Universiti Malaysia Pahang - 2012
504			_aBibliography : p. 27-29
520	3		_a1,3,7- 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.
650		0	_aExtraction (Chemistry)
650		0	_aCaffeine
999			_aVIRTUA40 _c3542 _d3548
999			_aVTLSSORT0080*0200*0400*0900*1000*2450*2600*3000*5020*5040*5200*6500*6501*9992