|
|
Assessment of aroma active compounds in elderberries
Kolibačová, Silvie ; Ürgeová,, Eva (referee) ; Vítová, Eva (advisor)
The aim of this diploma thesis was to determine the aroma active compounds in different varieties of black elderberry (Sambucus nigra L.) and in elder juices that were mixed in different proportions with grape juice. The sensory analysis of these juices was subsequently performed with focusing on their tastiness. The theoretical part deals with the description of the black elderberry, its occurrence, composition and use at home and in industrial processing, as well as a description of aroma active compounds, which have been previously identified in elder by various authors. In the experimental part aroma active substances were identified and quantified in seven selected varieties of elder. Solid Phase Microextraction method was used for their isolation and subsequent analysis was performed by gas chromatography. 39 aroma active compounds were identified totally in fruits of the black elderberry, of which 15 alcohols, 11 aldehydes, 7 ketones, 5 esters and 1 acid. 45 aroma active compounds were identified totally in elderberry juices, of which 19 alcohols, 8 aldehydes, 5 ketones, 7 esters and 6 acids. The sensory analysis of elder juices was performed using ranking test and evaluation using the scales.
|
|
|
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.
|
|
|
Assessment of aroma active compounds in elderberries
Kolibačová, Silvie ; Ürgeová,, Eva (referee) ; Vítová, Eva (advisor)
The aim of this diploma thesis was to determine the aroma active compounds in different varieties of black elderberry (Sambucus nigra L.) and in elder juices that were mixed in different proportions with grape juice. The sensory analysis of these juices was subsequently performed with focusing on their tastiness. The theoretical part deals with the description of the black elderberry, its occurrence, composition and use at home and in industrial processing, as well as a description of aroma active compounds, which have been previously identified in elder by various authors. In the experimental part aroma active substances were identified and quantified in seven selected varieties of elder. Solid Phase Microextraction method was used for their isolation and subsequent analysis was performed by gas chromatography. 39 aroma active compounds were identified totally in fruits of the black elderberry, of which 15 alcohols, 11 aldehydes, 7 ketones, 5 esters and 1 acid. 45 aroma active compounds were identified totally in elderberry juices, of which 19 alcohols, 8 aldehydes, 5 ketones, 7 esters and 6 acids. The sensory analysis of elder juices was performed using ranking test and evaluation using the scales.
|
|
|
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.
|
guest ::
