Composition and Characteristics of Benifuji Grape Aroma
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摘要:
目的 检测分析天津产区红富士葡萄果实香气,研究其葡萄果实的活性呈香成分及香气特征。 方法 采用顶空固相微萃取(HS-SPME)及气相色谱-质谱技术(GC-MS)提取检测果实香气,内标-标准曲线法定量,结合气味活性值及果实香气轮廓,分析葡萄果实活性呈香成分及香气特征。 结果 天津产区红富士葡萄果实中共定性定量39种香气化合物(总浓度9737.05 μg·L−1),酯类浓度最高,醇类次之;乙酸乙酯、1-己醇、反式-2-己烯-1-醇、丁酸乙酯和反式-2-己烯-1-醛是5种主要香气成分,它们的浓度之和(9461.79 μg·L−1)与检出化合物总浓度的比值高达97.17%,其中乙酸乙酯浓度(9036.53 μg·L−1)最为突出,分别占酯类浓度、总浓度的98.53%和92.81%;气味活性值结果显示,其果实香气主要由丁酸乙酯、2-甲基丁酸乙酯、己酸乙酯和异丁酸乙酯等12种活性呈香成分贡献;香气轮廓直观地显示,其果实香气主要由花卉类、水果类、植物类、脂肪类、化学类和香料类气味构成,其中水果类气味最为突出。 结论 天津产区红富士葡萄果实香气主要由酯类、醇类和醛类成分构成,含量最为丰富的酯类化合物贡献了突出的水果类气味。 Abstract:Objective Aromatic compounds and characteristics of Benifuji grapes grown in Tianjin were analyzed. Method Headspace solid phase microextraction (HS-SPME) and gas chromatography-mass spectrometry (GC-MS) were used to extract, determine, and quantify by internal standards and standard curves on the aromatics in Benifuji grapes. Olfactory property of the grapes was characterized according to the odor activity value (OAV) and aroma profiling. Result Thirty-nine aromatic compounds in a combined concentration of 9 737.05 μg·L−1 were identified. Esters were the dominant substances followed by alcohols. Ethyl acetate, 1-hexanol, trans-2-hexene-1-ol, ethyl butyrate, and trans-2-hexene-1-al were the 5 major aromatics, totaling 9 461.79 μg·L−1 in concentration and accounting for 97.17% of the total relevant volatiles. Ethyl acetate concentration, which constituted 9 036.53 μg·L−1, was by far the greatest amount among all. It accounted for 98.53% of all esters and 92.81% of total aromatics. The OAV of the grapes was contributed mainly by 12 compounds, such as ethyl butyrate, ethyl-2-methylbutyrate, ethyl hexanoate, and ethyl isobutyrate. A visualized aroma profiling for the grapes showed characteristics of flowers, fruits, plants, fats, chemicals, and spices, with the fruity note the most predominant. Conclusion The aroma of Benifuji grapes grown in Tianjin was made of volatiles including esters, alcohols, and aldehydes, with the esters being the most predominant components in quantity. -
表 1 红富士葡萄果实香气成分种类、数量及浓度
Table 1. Category, number, and concentration of aromatics in Benifuji grapes
化合物
Compounds数量
Number浓度
Concentration/
(μg·L−1)占总质量浓度比值
Ratio of subtotal
to total/%醇类
Alcohols12 433.33±14.23 4.45±0.15 酯类
Esters12 9170.95±58.55 94.19±0.60 萜烯类
Terpenes4 16.90±0.68 0.17±0.00 醛类
Aldehydes7 103.25±6.28 1.06±0.06 其他类
Others4 12.62±0.46 0.13±0.00 总计
Total39 9737.05±80.20 100.00 注:数据为平均值±标准差,下同。
Note: The data were mean ± standard deviation, the same below.表 2 红富士葡萄果实香气成分浓度
Table 2. Concentrations of aromatics in Benifuji grapes
编号
Code化合物
Compounds保留时间
Retention time/min匹配因子
Match factor标准品质量浓度范围
Standard concentration
range/(μg·L−1)水中阈值
Odour threshold in
water/(μg·L−1)果实中质量浓度
Concentration in
grape/(μg·L−1)醇类 Alcohols V1 正丁醇 1-Butanol 2.878 82.50 3.12-50.00 500[17-19] 8.17±0.42 V2 3-甲基-1-丁醇 3-Methyl-1-butanol 4.041 99.24 12.50-200.00 300[17,19] 9.87±0.36 V3 2-甲基-1-丁醇 2-Methyl-1-butanol 4.136 99.36 3.12-50.00 300[18] 4.93±0.19 V4 正戊醇 1-Pentanol 4.836 96.30 12.50-200.00 4000[17,19] 36.70±1.13 V5 反式-2-己烯-1-醇 trans-2-Hexen-1-ol 7.774 91.20 125.00-2000.00 100[20] 144.54±4.55 V6 1-己醇 1-Hexanol 7.862 96.77 125.00-2000.00 500[17-18] 167.13±5.17 V7 1-庚醇 1-Heptanol 11.637 95.52 3.12-50.00 425[17] 5.29±0.61 V8 1-辛烯-3-醇 1-Octen-3-ol 11.911 97.80 3.12-50.00 1[19,21] 7.78±0.55 V9 2-乙基己醇 2-Ethyl-hexanol 13.785 98.50 3.12-50.00 270[22] 0.04±0.00 V10 苯甲醇 Benzyl alcohol 14.006 95.40 12.50-200.00 10000[4,19] 41.72±0.92 V11 1-辛醇 1-Octanol 15.428 95.20 3.12-50.00 110[19] 4.10±0.15 V12 2-苯乙醇 2-Phenylethyl alcohol 16.926 99.00 62.50-1000.00 1100[4,19] 3.07±0.18 酯类 Esters V13 乙酸乙酯 Ethyl acetate 2.254 98.20 1875.00-30000.00 5000[17] 9036.53±53.85 V14 丙酸乙酯 Ethyl propionate 3.604 97.56 3.12-50.00 10[17] 15.88±0.76 V15 乙酸丙酯 Propyl acetate 3.657 96.63 3.12-50.00 4700[23] 5.98±0.46 V16 异丁酸乙酯 Ethyl isobutyrate 4.649 92.70 1.25-20.00 0.1[17] 1.36±0.08 V17 丁酸乙酯 Ethyl butyrate 5.737 98.98 7.50-120.00 1[17] 62.31±1.23 V18 乙酸丁酯 Butyl acetate 6.140 99.30 1.25-20.00 66[17] 0.52±0.02 V19 2-甲基丁酸乙酯 Ethyl-2-methylbutyrate 7.250 98.62 1.25-20.00 0.1[24] 4.35±0.17 V20 己酸乙酯 Ethyl hexanoate 12.702 91.85 1.25-20.00 1[17] 15.46±0.69 V21 乙酸己酯 Hexyl acetate 13.223 95.52 1.25-20.00 670[23,25] 6.07±0.30 V22 辛酸乙酯 Ethyl octanoate 20.055 98.09 1.25-20.00 194[17] 9.94±0.41 V23 乙酸苯乙酯 Phenylethyl acetate 22.108 98.55 1.25-20.00 480[17] 6.21±0.27 V24 壬酸乙酯 Ethyl nonanoate 23.488 96.99 1.25-20.00 377[17] 6.34±0.31 萜烯类Terpenes V25 β-蒎烯 β-pinene 12.318 90.42 12.50-200.00 140[17] 1.36±0.02 V26 柠檬烯 Limonene 13.679 97.68 3.12-50.00 10[4,19] 6.16±0.24 V27 异松油烯 Terpinolene 15.956 97.85 1.25-20.00 200[17] 5.08±0.24 V28 里哪醇 Linalool 16.432 98.93 62.50-1000.00 6[4,18] 4.30±0.18 醛类 Aldehydes V29 正戊醛 Pentanal 3.292 93.70 3.12-50.00 12[19] 2.90±0.10 V30 正己醛 Hexanal 5.592 96.80 31.25-500.00 4.5[17,18] 10.19±0.49 V31 反式-2-己烯-1-醛 trans-2-Hexen-1-al 7.265 94.90 125.00-2000.00 17[19] 51.28±3.65 V32 正庚醛 Heptanal 8.987 98.80 3.12-50.00 3[19] 5.12±0.26 V33 苯甲醛 Benzaldehyde 11.082 99.00 3.12-50.00 350[17,18] 7.26±0.32 V34 苯乙醛 Phenylacetaldehyde 14.291 94.30 3.12-50.00 4[17,18] 26.48±1.46 V35 壬醛 Nonanal 16.610 99.60 1.25-20.00 1[17] 0.02±0.00 其他 Others V36 6-甲基-5-庚烯-2-酮 6-Methyl-5-heptene 2-one 12.230 83.90 3.12-50.00 50[19] 9.30±0.33 V37 2-辛酮 2-Octanone 12.352 89.70 3.12-50.00 5[17] 2.64±0.12 V38 苯乙烯 Styrene 8.508 98.49 0.62-10.00 37[26] 0.11±0.00 V39 辛酸 Octanoic acid 20.085 93.67 0.62-10.00 3000[17] 0.57±0.01 表 3 活性呈香成分的气味活性值(OAV)
Table 3. OAVs of active aromatic components
化合物
Compounds香气描述
Odour descriptor香系
OdourseriesOAV 反式-2-己烯-1-醇 trans-2-Hexen-1-ol 草本绿植[20,25,27],树叶、胡桃木[28] Herbaceous green, leaf, walnut 3 1.45±0.05 1-辛烯-3-醇 1-Octen-3-ol 蘑菇[21,28,29],青草、鱼腥味[30] Mushroom,fishy, grassy 3, 4 7.78±0.55 乙酸乙酯 Ethyl acetate 菠萝[25,28,31,32],溶剂[25,33],香料[31],大茴香[32]Pineapple, solvent, balsamic, anise 2, 5, 6 1.81±0.01 丙酸乙酯 Ethyl propionate 水果[18],香蕉、苹果[31] Fruit, banana, apple 2 1.59±0.08 异丁酸乙酯 Ethyl isobutyrate 香蕉[30],甜香[28,34],橡胶[28],水果[30,31,34] Banana, sweet, rubber, fruity 2, 5 13.64±0.80 丁酸乙酯 Ethyl butyrate 苹果[28,30,34],菠萝、香蕉[34] Apple, pineapple, banana 2 62.31±1.23 2-甲基丁酸乙酯 Ethyl-2-methylbutyrate 苹果[28] Apple 2 43.54±1.70 己酸乙酯 Ethyl hexanoate 水果[28,34],青苹果、香蕉、类似红酒[23,31] Fruity, green apple banana, wine-like 2 15.46±0.69 正己醛 Hexanal 鱼腥味[30],青草[28,30],动物脂油、脂肪[28] Fishy, grass, tallow, fat 3, 4 2.27±0.11 反式-2-己烯-1-醛 trans-2-Hexen-1-al 青草[27],绿叶[28] Grass herbaceous, green leaf, 3 3.03±0.21 正庚醛 Heptanal 柑橘类植物、脂肪、不新鲜的[28],鱼干[30] Citrus, fat, rancid, dry fish 3, 4 1.71±0.09 苯乙醛 Phenylacetaldehyde 山楂花、蜂蜜、甜香[28],玫瑰[35] Hawthorn, honey, sweet, rose 1, 2 6.62±0.37 注:气味系列:1:花卉类,2:水果类,3:植物类,4:脂肪类,5:化学类,6:香料类,7:烘焙类,8:矿物类。
Note: Odour series: 1: Floral, 2: Fruity, 3: Vegetal, 4: Fatty, 5: Chemical, 6: Spicy, 7: Roast, 8: Mineral. -
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