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The assessment of aroma active compounds in elderberry juice
Lukačková, Adéla ; Divišová, Radka (referee) ; Vítová, Eva (advisor)
This work deals with the assessment of aroma active compounds in elderberry juice. In the theoretical part, the characteristic of elderberry, including species, varieties of elderberries, content compounds and use is described. The production of fruit juices and SPME-GC method, which has been chosen for assessment, is shortly summarized here. In the experimental part, identification and quantification of aroma active compounds in 11 samples with various content of elderberry juice combined with other type of fruit juice, diluted or not diluted with water, was made. The fiber CARTM/PDMS 85 µm was used for extraction of aroma compounds. 43 aromatic compounds were identified in total 5 aldehydes, 7 ketones, 18 alcohols, 5 esters and 8 fatty acids. The most of all aroma active compounds were determined in sample containing 10% of elderberry juice with 50% of apple juice and 40% of water, but some of them were not identified. The most of all compounds identified were determined in commercially acquired concentrated elderberry juice sample from Austria.
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The possibilities of the assessment of aroma active compounds in elderberry juice
Kolibačová, Silvie ; Vránová, Dana (referee) ; Vítová, Eva (advisor)
This bachelor thesis is a literature research, which deals with the characteristics of black elderberry, its occurrence, types and how to use it particularly in medicine and food industry. The next section describes the production of fruit juices and methodologies for the determination of aromatic compounds in elderflower juice, which were selected for future measurements. This is the method solid phase microextraction (SPME) and gas chromatography (GC). Almost a hundred different volatile compounds are given in the literature, which are located in different cultures of elderberry and their presence and quantity are dependent not only on the culture, but also on the season, the environment and the method that was used for extraction and determination of aromatic compounds.
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