Studies on the effects of microwave drying and cabinet tray drying on the chemical composition of volatile oils of garlic powders

Prabhakara Rao, Pamidighantam and Nagender, Allani and Jaganmohan Rao, L. and Dubasi Govardhana , Rao (2007) Studies on the effects of microwave drying and cabinet tray drying on the chemical composition of volatile oils of garlic powders. European Food Research and Technology, 224. pp. 791-795.

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Abstract

Garlic cloves in the form of bits were dried in a cabinet tray dryer and a microwave dryer, and pulverized to obtain free flowing powder. The volatile oil was obtained by hydro-steam distillation method. Fresh cloves and the powders resulting from the two drying methods were used for obtaining the volatile oil, which was analyzed by GCMS. The studies were mainly restricted to comparing the effect of drying methods on the volatile oil composition of the powders. Although the drying time was reduced considerably from 8 h in a cabinet dryer to 0.25 h in a microwave dryer, essential oil yield and color values were lower, and flavor quality varied considerably. The relative concentrations of major peaks such as diallyl disulfide, diallyl tetrasulfide increased in both the drying methods, and it was more so in microwave-dried samples. However, the concentrations of the other two major peaks, diallyl trisul- fide and allyl methyl trisulfide, decreased in both drying methods, and they were lower in microwave-dried samples. Hunter values of L and b were lower for samples obtained by microwave drying as compared to those of cabinet-dried samples.

Item Type:	Article
Uncontrolled Keywords:	Garlic cloves . Drying . Hunter values . Essential oil . GC-MS analyses
Subjects:	600 Technology > 08 Food technology > 06 Preservation and Storage > 02 Drying and Dehydration 600 Technology > 08 Food technology > 30 Spices/Condiments
Divisions:	Plantation Products Spices and Flavour Technology CFTRI Resource Centres > Hyderabad
Depositing User:	Food Sci. & Technol. Information Services
Date Deposited:	09 Aug 2008 10:13
Last Modified:	07 May 2012 05:06
URI:	http://ir.cftri.res.in/id/eprint/8678

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