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Öğe Aroma components of Iranian dried Heracleum persicum fruit (golpar) using solvent-assisted flavour evaporation technique(Food Reseach Institute, 2016) Amanpour, Asghar; Kelebek, Haşim; Selli, SerkanAroma composition obtained from Iranian dried Heracleum persicum Desf. ex Fisch. was analysed by the gas chromatography- mass spectrometry (GC-MS) technique. For the first time in this plant aroma, the solvent-assisted flavour evaporation (SAFE) extraction method with dichloromethane was used prior to GC-MS. A total of 26 aroma compounds comprising esters, terpenes, acids, alcohol and aldehyde were identified and quantified in dried H. persicum fruit. Among the detected compounds, esters were present on highest levels, followed by terpenes. Hexyl butyrate was quantitatively the main aroma compound in this fruit, representing 65.6% of the total aroma compounds analysed, followed by octyl acetate (18.2%), hexyl isobutanoate (5.6%), ?-terpinene (1.6%) and o-cymene (1.3%). © 2016 National Agricultural and Food Centre (Slovakia).Öğe Aroma components of Iranian dried Heracleum persicum fruit (golpar) using solvent-assisted flavour evaporation technique(Vup Food Research Inst, Bratislava, 2016) Amanpour, Asghar; Kelebek, Haşim; Selli, SerkanAroma composition obtained from Iranian dried Heracleum persicum Desf. ex Fisch. was analysed by the gas chromatography- mass spectrometry (GC-MS) technique. For the first time in this plant aroma, the solvent-assisted flavour evaporation (SAFE) extraction method with dichloromethane was used prior to GC-MS. A total of 26 aroma compounds comprising esters, terpenes, acids, alcohol and aldehyde were identified and quantified in dried H. persicum fruit. Among the detected compounds, esters were present on highest levels, followed by terpenes. Hexyl butyrate was quantitatively the main aroma compound in this fruit, representing 65.6% of the total aroma compounds analysed, followed by octyl acetate (18.2%), hexyl isobutanoate (5.6%), gamma-terpinene (1.6%) and o-cymene (1.3%).Öğe Aroma constituents of shade-dried aerial parts of Iranian dill (Anethum graveolens L.) and savory (Satureja sahendica Bornm.) by solvent-assisted flavor evaporation technique(Springer, 2017) Amanpour, Asghar; Kelebek, Haşim; Selli, SerkanThe aroma profile of shade-dried aerial part from Iranian dill (Anethum graveolens L.) and Savory (Satureja sahendica Bornm.) plants was analyzed by the gas chromatography-mass spectrometry (GC-MS) and gas chromatography-flame ionization detector (GC-FID). For the first time in these aromatic plants, the solvent-assisted flavour evaporation (SAFE) extraction method with dichloromethane was used prior to GC-MS. A total of 40 and 26 aroma compounds was identified in dill and savory. Dill contained 271.52 mu g/g total amount of aroma compounds, which included terpenes (28), aldehydes (3), alcohol (1), acids (3), volatile phenols (3), ketone (1) and norisoprenoid (1). Savory possessed 10,547.16 mu g/g total amount of aroma compounds, including terpenes (20), alcohol (1) and volatile phenols (5). Of all aroma compounds detected in both plants, terpenes were quantitatively the most dominant aroma volatiles. In the overall aroma volatiles, alpha-phellandrene (160.0 mu g/g) together with sabinene (26.5 mu g/g), D-carvone (16.2 mu g/g), DL-limonene (12.3 mu g/g) and dill ether (7.8 mu g/g) in dill and gamma-terpinene (6236.83 mu g/g) along with carvacrol (3239.19 mu g/g), alpha-pinene (267.08 mu g/g), alpha-thujene (219.36 mu g/g) and beta-bisabolene (130.8 mu g/g) in savory were the major compounds.Öğe Characterization of aroma, aroma-active compounds and fatty acids profiles of cv. Nizip Yaglik oils as affected by three maturity periods of olives(Wiley, 2019) Amanpour, Asghar; Kelebek, Haşim; Selli, SerkanBACKGROUND The present study aimed to investigate how olive maturity indices (MI) (2.5, 3.5 and 4.5 MI) affect the aroma, aroma-active compounds, fatty acid profiles and color properties of cv. Nizip Yaglik olive oils. Various techniques for extracting volatiles from oil materials are available in the literature. Aroma compounds were extracted by the solvent-assisted flavor evaporation extraction method for the first time in olive oil. RESULTS The type and number of aroma-active compounds varied according to maturity periods of olives. A total of 22, 21 and 20 different key odorants were found in aromatic extracts of samples with 2.5, 3.5 and 4.5 MI, respectively. The most potent aroma-active compounds based on flavor dilution (FD) factor values were hexanal (green) for 2.5 MI (FD: 1024) and 3.5 MI (FD: 512), as well as 1-penten-3-ol (green-leafy) for 4.5 MI (FD: 512). CONCLUSION Overall, olive oils obtained from unripe and medium-ripe olives had stronger green and fruity odours compared to ripe olives. Principal component analysis demonstrated that oils were clearly discriminated according to their general physicochemical analysis, fatty acids, aroma profiles and key odorants. The results of the present study show that the olive maturity period has a significant influence on the quality parameters of olive oil. (c) 2018 Society of Chemical IndustryÖğe Characterization of Aroma-Active Compounds in Iranian cv. Mari Olive Oil by Aroma Extract Dilution Analysis and GC–MS-Olfactometry(Springer Verlag, 2016) Amanpour, Asghar; Kelebek, Haşim; Kesen, Songul; Selli, SerkanAroma, aroma-active compounds and fatty acid profiles of Iranian olive oil obtained from the cv. Mari were investigated for the first time in the current study. Aroma extracts were isolated from the oil by using a purge and trap extraction system and their compositions were analyzed by gas chromatography-mass spectrometry-olfactometry (GC–MS-O). A total of 35 aroma compounds comprising alcohols, aldehydes, acids, esters, ketones, terpenes and volatile phenols were identified and quantified in the assayed samples. Aldehydes were present at the highest levels, followed by ketones and alcohols. (E)-2-Hexenal was quantitatively (1589 µg kg?1) the main aroma compound in the analyzed oils, followed by hexanal and (E)-2-heptenal. The aroma-active volatiles were elucidated in the aromatic extract by applying aroma extract dilution analysis (AEDA). The results of AEDA revealed 17 aroma-active compounds. Under these condition it was possible to completely identify 16 of these compounds. Regarding to the flavor dilution (FD) factor, the most potent odorants with the highest FD factor were (E)-2-hexenal (512), followed by hexanal, 6-methyl-5-hepten-2-one, (E)-2-decenal and one unknown compound (LRI = 1871). The fatty acid profile of the tested oils was composed of thirteen compounds. Oleic acid was the main fatty acid (76.01 %) followed by palmitic acid. © 2016, AOCS.Öğe Characterization of Key Odorants in Moroccan Argan Oil by Aroma Extract Dilution Analysis(Wiley-VCH Verlag, 2019) Sevindik, Onur; Amanpour, Asghar; Tsouli Sarhir, Salwa; Kelebek, Haşim; Selli, SerkanThe aroma-active compounds of Moroccan argan oil are sensorily and instrumentally analyzed via gas chromatography-mass spectrometry-olfactometry (GC-MS-O). The purge and trap extraction (PTE) method is used for the extraction of volatile components. A total of 35 aroma compounds are determined including mostly alcohols and pyrazines, and some carboxylic acids, pyrroles, furans, lactones, volatile phenols, an aldehyde, and a ketone. An aroma extract dilution analysis of the aromatic fraction of argan oil isolated by the PTE method reveals 19 key odorants with flavor dilution (FD) factors ranging from 4 to 512, among which nonanal, 2,5-dimethyl-3-ethylpyrazine and 2,3-diethyl-5-methylpyrazine show the highest FD factors of 512. As for the principal scents perceived by all panelists, characteristic odor notes in argan oil are found to be roasty, nutty, fatty, earthy, and cheesy. Practical Applications: Nut oil is one of the most widely consumed oils in many countries. The outcomes of this investigation provide valuable information for elucidation of the key odorants and aroma composition of the well-known and expensive Moroccan argan oil. Aroma is a crucial quality parameter of a foodstuff which directly influences customer preferences. Therefore, determining the key odorants of argan oil's aromatic extract isolated by purge and trap methodology is of major importance for the argan oil sector. The purge and trap extraction set for separation followed by analysis and characterization of those compounds via gas chromatography–mass spectrometry-olfactometry (GC-MS-O) is an effective practical application tool for aroma description in valuable and expensive oil samples. It is observed that the characteristic odor notes of argan oil are related to the few most powerful aroma-active compounds using the aroma extract dilution analysis technique. The aroma-active compounds of Moroccan argan oil are sensorily and instrumentally analyzed via gas chromatography-mass spectrometry-olfactometry (GC-MS-O). The purge and trap extraction (PTE) method is used for the extraction of volatile components. A total of 19 aroma compounds are detected as aroma active by AEDA method among 35 volatiles. Characteristic odor notes in argan oil are found to be roasty, nutty, fatty, earthy, and cheesy. © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, WeinheimÖğe Elucidation of Infusion-Induced Changes in the Key Odorants and Aroma Profile of Iranian Endemic Borage (Echium amoenum) Herbal Tea(Amer Chemical Soc, 2019) Amanpour, Asghar; Zannou, Oscar; Kelebek, Haşim; Selli, SerkanInfusion-induced changes in the aroma and key odorants and their odor activity values of Iranian endemic herbal (Gol-Gavzaban) tea obtained from shade-dried violet-blue petals of borage (Echium amoenum) were studied for the first time. Two hot teas and one cold tea were investigated and coded as 4MN (4 min/98 degrees C), 16MN (16 min/98 degrees C), and 24HR (24 h/ambient temperature), respectively. Aromatic extracts of the tea samples were isolated by the liquid-liquid extraction method and analyzed by gas chromatography-mass spectrometry-olfactometry (GC-MS-O) for the first time. According to the results of the aroma profiling, a total of 35 common aroma compounds comprising alcohols, acids, volatile phenols, lactones, aldehydes, ketone, pyrroles, and furans were identified and quantified in the tea samples. Indeed, it is worth noting that the aroma profiles of the borage teas were similar. However, the effects of the infusion techniques were clearly different as observed on the content of each individual and total compounds in the samples. The highest mean total concentration was detected in 24HR (266.0 mg/kg), followed by 16MN (247.1 mg/kg) and 4MN (216.1 mg/kg). 1-Penten-3-ol was the principal volatile component in all borage teas. On the basis of the result of the flavor dilution (FD) factors, a combined total of 22 different key odorants was detected. The potential key odorants with regard to FD factors in all samples were prevailingly alcohols, acids, and terpenes. The highest FD factors were observed in 2-hexanol (2048 in 4MN and 24HR; 1024 in 16MN) and 1-penten-3-ol (2048 in 24HR; 1024 in 4MN and 16MN) in samples providing herbal and green notes. Principal component analysis (PCA) showed that the tea samples could clearly be discriminated in terms of their aroma profiles and key odorants. The findings of the current study demonstrate that the tea preparation conditions have a significant impact on the organoleptic quality of borage tea.Öğe Gas Chromatography-Mass Spectrometry-Olfactometry To Control the Aroma Fingerprint of Extra Virgin Olive Oil from Three Tunisian Cultivars at Three Harvest Times(Amer Chemical Soc, 2018) Ben Brahim, Samia; Amanpour, Asghar; Chtourou, Fatma; Kelebek, Haşim; Selli, Serkan; Bouaziz, MohamedGas chromatography-mass spectrometry-olfactometry was used for the analysis of volatile compounds and key odorants of three less studied Tunisian olive oil cultivars for the first time. A total of 42 aroma compounds were identified and quantified in extra virgin olive oils. The present study revealed that the most dominant volatiles in olive oil samples qualitatively and quantitatively were aldehydes and alcohols, followed by terpenes and esters. Indeed, chemometric analysis has shown a correlation between chemical compounds and sensory properties. The determination of aroma-active compounds of olive oil samples was carried out using aroma extract dilution analysis. A total of 15 aroma-active compounds were detected in the aromatic extract of extra virgin olive oil, of which 14 were identified. On the basis of the flavor dilution (FD) factor, the most potent aromatic active compound was hexanal (FD = 512) in Fakhari olive oil, (FD = 256) in Touffehi oils, and (FD = 128) in Jemri olive oil.Öğe GC-MS-Olfactometric Differentiation of Aroma-Active Compounds in Turkish Heat-Treated Sausages by Application of Aroma Extract Dilution Analysis(Springer, 2019) Ozkara, Kevser Tuba; Amanpour, Asghar; Güçlü, Gamze; Kelebek, Haşim; Selli, SerkanAroma and aroma-active compounds of the heat-treated Turkish sausages obtained from beef, turkey, and chicken meats were studied. Aroma compounds were isolated by using solvent-assisted flavor evaporation and analyzed by gas chromatography/mass spectrometry-olfactometry (GC-MS-O) for the first time. A total of 47, 63, and 64 aroma compounds, including esters, terpenes, terpenols, aldehydes, phenols, ketones, acids, alcohols, lactones, furans, sulfur compounds, and pyrazines, were identified and quantified in the beef, turkey, and chicken sausages, respectively. The most prominent differences between the sausage samples were as follows: (E)-sabinene hydrate, beta-cubebene, 2-hexanol, 5-methyl-2-heptanol, 2-heptanol, 2-nonanol, 4-methyl-3-hexanol, and heptanoic acid were detected only in chicken sausage samples; (Z)-p-mentha-1(7)8-dien-2-ol, dimethylallyl alcohol, 1,2-ethanediol, furfuryl alcohol, furfural, 2-ethyl-6-methylpyrazine, trimethyl pyrazine, and 2(5H)-furanone were detected only in turkey sausage samples; and 2-butoxyethanol, octanoic acid, and nonanoic acid were detected only in beef sausage samples. The aroma-active compounds of sausages were elucidated by using aroma extract dilution analysis (AEDA) for the first time. A combined total of 31 different aroma-active compounds were detected. The aroma-actives with the greatest flavor dilution (FD) factors in beef (FD 1024 and odor activity value (OAV) 178.07), and chicken (FD 2048 and OAV 262.63) sausages were gamma-terpinene, and in turkey (FD 2048 and OAV 353.86) sausages were linalool.Öğe GLC/HPLC Methods for Saffron (Crocus sativus L.)(Springer Science and Business Media B.V., 2019) Amanpour, Asghar; Kelebek, Haşim; Selli, SerkanSaffron (Crocus sativus L.) is provided from the dried and dark-red stigmas of flowers belonging to the family of Iridaceae. Concerning the total content of saffron production, the biggest producer territory in the world is Iran, followed by Spain, India, Italy, Greece, and Morocco. Crocetin, crocin, picrocrocin, and safranal are the four main bioactive compounds in saffron which contribute both organoleptic profile of saffron (pigment, pigment, taste, and odor, respectively) and the health-progressing features. Isolation, identification, and quantification of bioactive compounds from complex and natural matrix of food stuffs are a main and common trouble of initial interest in food quality measurement and characterization. Chromatography is a set of constituents’ separation techniques in a complex mixture. Recently, chromatographic methods were widely used for the isolation, identification, quantification, and analysis of saffron components. Although there are various kinds of chromatographic techniques, more recently a gas chromatography (GC) with a mass spectrometer (MS) detector for the volatile compounds and reversed-phase high-performance liquid chromatography (RP-HPLC) coupled with a UV-Vis detector are the techniques of choice, permitting the isolation on an analytical value and the quantification and identification of the metabolites of interest in saffron. However, this chapter principally conducted the analysis of saffron compounds comprising the aroma and most aroma-active compounds using GC-MS and GC-MS-olfactometry setups and bioactive compounds such as carotenoids, flavonoids, and phenolic compounds using HPLC techniques. © 2019, Springer Nature Switzerland AG.Öğe LC-DAD-ESI-MS/MS and GC-MS profiling of phenolic and aroma compounds of high oleic sunflower oil during deep-fat frying(Wiley, 2019) Sönmezdağ, Ahmet Salih; Kesen, Songul; Amanpour, Asghar; Güçlü, Gamze; Kelebek, Haşim; Selli, SerkanSunflower oils obtained after frying potatoes for different times (1, 5, and 10) and non-fried oils were analyzed. In total, 43 aroma substances were identified by GC-MS analyses and aldehydes were detected as the main chemical group. The concentration of aldehydes increased with the frying process and among them, (E,E)-2,4-decadienal, (E)-2-heptenal, and hexanal were found to be the major aroma compounds. High performance liquid chromatography with diode array detector, coupled with mass in tandem mode, were employed for quantitative and qualitative analysis of phenolic compounds. Rutin was the major phenolic compound in sunflower oils followed by chlorogenic acid, and they constituted the largest proportion of the total phenolic content in all oil samples. The concentration of phenolic compounds of sunflower oil revealed essential changes during several thermal processes and underwent degradation during heating. Only about 2% of its initial content presented after 10 frying process. Practical applications The present study explores the effects of the deep-fat frying process on aroma and phenolic compositions of sunflower oil. The cooking technique plays a significant role in the expanding global food industry. The findings of the research could be helpful for standardizing and preserving the taste, aroma, and nutritional value of the used oils and foods. Additionally, for the researchers, this study would give insight for identification and qualification phenolic and aroma compounds of sunflower oil.Öğe LC-DAD-ESI-MS/MS-based phenolic profiling and antioxidant activity in Turkish cv. Nizip Yaglik olive oils from different maturity olives(Wiley, 2019) Amanpour, Asghar; Kelebek, Haşim; Selli, SerkanThe current study was designed to find out how olive maturity indices (2.5, 3.5, and 4.5) affect the individual phenolic compounds and antioxidant potencies of olive oils produced from cv. Nizip Yaglik olives. Liquid chromatography coupled to diode array detection and electrospray ionization tandem mass spectrometry in multiple reaction monitoring mode was utilized for the determination of phenolic composition qualitatively and quantitatively. Findings asserted a quite similar phenolic profile (14 phenols) depending on the various phenolic groups in all oils, while the concentration of total and individual phenolic compounds revealed significant differences between the samples statistically (p < 0.05). Among the individual phenolic classes in all samples, secoiridoids were the most prevailing group and their total content showed a clear significant decline as the olive fruits get ripened. Antioxidant potency values showed a clear diminution attitude during the maturation of the olives. The principal component analysis revealed that oils were discriminated from each other according to phenolic compounds and antioxidant potencies. Moreover, oils obtained from the unripe and medium-ripe fruits possessed a very good quality marked by their elevated phenolic levels.
