PTR-MS system allows for real-time online VOCs monitoring at ultra-low concentration as a few ppt v in real-time. The PTR-MS technique was invented in 1998 by Lindinger et al. Moreover, GC is characterized by a relatively long time of analysis therefore, alternative methods for the analysis of volatile compounds are sought.Īnother advanced analytical technique which might be used to determine VOCs in the fruit samples is a proton transfer reaction mass spectrometry (PTR-MS). The application of gas chromatography technique is time-consuming and labour-intensive. The pulp and juices squeezed out of these fruits are analyzed less frequently. The research is carried out mainly on samples of fruit peels or extracted essential oils. The chemical aroma of citrus fruit is mainly evaluated by gas chromatography (GC) techniques. Based on the aromas of food products (including fruit), their taste and quality can be pre-determined. The higher antioxidant capacity and sweet flavour of sweetie could make these new kinds of citrus fruit preferable in human diets.įruit aroma is an extremely important factor influencing the attractiveness of a given product to the consumer. And including it in the daily human diet can positively affect the levels of serum lipids, albumin, and fibrinogen. Based on research of juice squeezed from sweetie fruit, it was found that this juice contains large amounts of bioactive compounds and has a high antioxidant potential. Phenol content and the antioxidant potential are also significantly higher in sweetie than in grapefruit. The taste of the sweetie resembles the taste of grapefruit, but it is much sweeter, because it contains almost twofold higher content of sugars compared to ‘Marsh’ grapefruit. This fruit is also known as ‘Oroblanco’ grapefruit. It is a hybrid between white grapefruit (‘Marsh’ Citrus paradisi Macfadyen) and pummelo ( Citrus grandis ‘Osbeck’) invented in 1962. In recent years, sweetie fruit ( Citrus maxima × Citrus paradisi) has become more and more popular. A high intake of these fruits may reduce the risk of degenerative diseases. proved a protective effect of high citrus fruit in the risk of stomach cancer. Furthermore, it has been found that many of the chemical substances, determined in citrus fruit, have antioxidant properties, which can promote the elimination of cancer cells. Moreover, these kind of fruit is a good source of many vitamins and minerals necessary for the proper functioning of the human body. Citrus fruit have a high content of ascorbic acid, phenolic compounds, and flavonoids. This is due to the high content of antioxidant compounds. In addition to very good taste, these fruits are also characterized by pro-health properties. Experts at the Organization for Economic Co-operation and Development estimate that in 2017 over 90 million tons of citrus fruit were produced. Graphical abstractĬitrus fruit are one of the most commonly consumed fruit varieties in the world. Principal component analysis was performed to evaluate the differences between the groups. The chemical formula of these VOC masses was tentatively identified. Proton transfer reaction Time-of-Flight mass spectrometry (PTR-TOF-MS) was utilized to obtain the mass-resolved fingerprints of VOCs. The aim of this study was to verify the unique volatile compositional traits of three species of citrus fruit. Sweetie fruit is characterized by high antioxidant potential and a positive effect on human health. Sweetie is a hybrid of grapefruit and pummelo. Such situations are often found for hybrid fruit. In the case where several fruit have similar aromas and only one of them has specific health properties, it is very important to find the differences in the volatile organic compounds (VOCs) composition to distinguish these samples. The quality of the fruit is affected by several main ingredients and the aroma plays a fundamental role during the selection of fruit by consumers.
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