TY  - BOOK
AU  - Norhamizah Johari
TI  - Batch extraction of 1,3,7-trymethylxanthine from KKM22 cocoa seeds
SN  - THE0004057(Local)
PY  - 2012///
CY  - Kuantan, Pahang
PB  - UMP
KW  - Extraction (Chemistry)
KW  - Caffeine
N1  - Project paper (Bachelor of Chemical Engineering) -- Universiti Malaysia Pahang - 2012; Bibliography : p. 27-29
N2  - 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
ER  -