Paper Type |
Contributed Paper |
Title |
Effect of Grain Coating by Natural Materials on the Aroma Quality of KDML105 Rice |
Author |
Woraluk Angsuwarangoon, Patcharee Pripdeevech, Chonlada Bennett, Phumon Sookwong and Sugunya Mahatheeranont |
Email |
woraluk.a@cmu.ac.th |
Abstract: This study evaluated the effectiveness of different coating formulas in preserving the aroma quality of Khao Dawk Mali 105 (KDML 105) rice grains, particularly focusing on the key aroma compound, 2-acetyl-1-pyrroline (2AP). Initially, thirteen coating formulas were tested, and gum arabic was found to be the most effective in maintaining rice appearance and preventing mold growth during storage. In a subsequent experiment, rice coated with carnauba wax, gum arabic, and a 1:1 mixture of both was analyzed for 2AP content over 10 weeks using SHS-GC, under storage conditions of ambient temperature (25 °C) and 4 °C in polyethylene and laminated bags. The 10% gum arabic coating was the most effective at retaining 2AP after 10 weeks. Additionally, the study included a comparison with a 5% rice gel coating and a mixture of 5% gum arabic and 5% rice gel. The results indicated rice stored at 4 °C in laminated bags exhibited a 2-3% reduction in 2AP content after 6 weeks, while at ambient temperature, a reduction of 44-64% was observed. After 10 weeks, the 2AP contents in the 10% gum arabic coated rice were the highest at an average of 38-40% compared to those of the control group. Furthermore, the rancid compounds, including hexanal, heptanal, octanal, nonanal, and 2-pentylfuran, increased significantly in all coated rice samples at ambient temperature, with the highest hexanal content found in rice coated with a mixture of 5% gum arabic and 5% rice gel, showing approximately 22-55% increase compared with those of the uncoated rice. Overall, gum arabic coating was the most effective in preserving 2AP for at least 10 weeks, and storage at 4 °C provided the best conditions for aroma retention and rancid prevention. |
|
Article ID |
e2024084 |
Received Date |
2024-09-19 |
Revised Date |
2024-09-26 |
Accepted Date |
2024-09-26 |
Full Text |
Download |
Keyword |
2-acetyl-1-pyrroline, grain coating, hexanal, rancid compound, SHS-GC |
Volume |
Vol.51 No.5 (September 2024) |
DOI |
https://doi.org/10.12982/CMJS.2024.084 |
Citation |
Angsuwarangoon W., Pripdeevech P., Bennett C., Sookwong P. and Mahatheeranont S., Effect of Grain Coating by Natural Materials on the Aroma Quality of KDML105 Rice , Chiang Mai J. Sci., 2024; 51(5): e2024084. DOI 10.12982/CMJS.2024.084. |
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