Characterization of flavour in dried cocoa beans from various fermentaries in Tawau district

Naida Haruliza Harun, (2007) Characterization of flavour in dried cocoa beans from various fermentaries in Tawau district. Universiti Malaysia Sabah. (Unpublished)

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Abstract

Characterization of flavour profile of samples from 5 different fermentaries in Tawau district were carried out which include moisture content, titrable acidity and fermentation index. Moisture content and titrable acidity show quantity of water and acid in dried beans while fermentation index determine how well the beans had been fermented. Flavour compounds from dried cocoa beans were extracted using Likens-Nickerson apparatus with dichloromethane as solvent before being injected into gas chromatogrammass spectrometer and analyzed. Sample from fermentary A with moisture content of 8.89 %, titrable acidity value of 0.318 mmoles and fermentation index of 1.019 had yielded 14.52 x10² ppm oftetramethylpyrazine. Sample from fermentary B with moisture content of 7.74 %, titrable acidity value of 0.264 mmoles and fermentation index of 1.04 had yielded 55.05 x10² ppm of tetramethylpyrazine. Sample from fermentary C with moisture content of 6.48 %, titrable acidity value of 0.164 mmoles and fermentation index of 0.816 had yielded 6.96 x10² ppm of tetramethylpyrazine. Meanwhile the sample from fermentary D with moisture content of 2.69 %, titrable value of 0.1 mmoles and fermentation index of 0.658 had no tetramethylpyrazine. Sample from fermentary E with moisture content of 8.17 %, titrable acidity value of 0.188 mmoles and fermentation index of 0.518 had yielded 0.987 x10² ppm of tetramethylpyrazine. The results showed that concentration of tetramethylpyrazine had varied with moisture content, titrable acidity and fermentation index. These parameters were greatly affected by different techniques used in the fermentary.

Item Type: Academic Exercise
Uncontrolled Keywords: fermentation index, titrable acidity, moisture content, dried cocoa beans, tetramethylpyrazine, Likens-Nickerson apparatus
Subjects: T Technology > TP Chemical technology
Divisions: SCHOOL > School of Science and Technology
Depositing User: MDM SITI AZIZAH IDRIS
Date Deposited: 22 Apr 2014 01:15
Last Modified: 13 Oct 2017 03:12
URI: http://eprints.ums.edu.my/id/eprint/8802

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