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vanilla_planifolia_andrews [2019/02/02 11:31]
andreas
vanilla_planifolia_andrews [2019/05/20 14:54] (aktuell)
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 [Gobley, N.-T. (1858). "​Recherches sur le principe odorant de la vanille"​. Journal de Pharmacie et de Chimie. 34: 401-405] [Gobley, N.-T. (1858). "​Recherches sur le principe odorant de la vanille"​. Journal de Pharmacie et de Chimie. 34: 401-405]
  
-Quantitative analysis (GC) of vanilla oleoresin revealed 1 ppm of cis/​trans-vitispirane in the ratio of 1:3. The cis diastereomer ​is fresher and more intense (reminescent of the green dour of chrysanthemum,​ with a flowery-fruity wine note) than the trans-compound (heavy exotic flower scent with earthy-woody ​undertone). \\+Quantitative analysis (GC) of vanilla oleoresin revealed 1 ppm of cis/​trans-vitispirane in the ratio of 1:3. The cis diastereomer ​seems fresher and more intense (reminescent of the green scent of chrysanthemum,​ with a flowery-fruity wine note) than the trans-compound (heavy exotic flower scent with an earthy-woody ​touch). \\
 [Schulte‐Elte,​ Karl H., et al. "​Vitispiranes,​ Important Constitutents of Vanilla Aroma."​ Helvetica Chimica Acta 61.3 (1978): 1125-1133] [Schulte‐Elte,​ Karl H., et al. "​Vitispiranes,​ Important Constitutents of Vanilla Aroma."​ Helvetica Chimica Acta 61.3 (1978): 1125-1133]
  
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 and extremely complex structure of this flavouring. \\  and extremely complex structure of this flavouring. \\ 
 Ten phenolic compounds were detected in vanilla extracts as being aroma-active. [[http://​www.thegoodscentscompany.com/​data/​rw1032272.html|Guaiacol]],​ 4-methylguaiacol Ten phenolic compounds were detected in vanilla extracts as being aroma-active. [[http://​www.thegoodscentscompany.com/​data/​rw1032272.html|Guaiacol]],​ 4-methylguaiacol
-and [[http://​www.thegoodscentscompany.com/​data/​rw1057511.html|acetovanillone]],​ occurring at concentrations of 3.8-13.7 ppm, were similar in intensity to vanillin, which was detected at a concentration of more than 1000 times that of these compounds. Methyl salicylate, detected at a level of less than 1 ppm, was perceived as being as intense as anillin. p-Cresol, methyl cinnamate and anisyl alcohol, occurring at concentrations of 1.1-2.4 ppm, were of medium intensity. Sweet, woody, balsamic, spicy, vanilla-like and toasted notes were attributed to phenolic compounds. Vanillic acid was not perceived by panellists, because its elution required a high temperature,​ which caused a burnt odour in the sniffing port. The aldehydes 2-heptenal and (E)-2-decenal,​ identified here for the first time in vanilla beans, were perceived as being of medium intensity, with green, oily and herb-like floral notes. Aliphatic, acetic, isobutyric, isovaleric and valeric acids were perceived by the panellists as having sour, buttery and oily notes. In conclusion, this study is in agreement with previous observations of the contribution of minor constituents to the overall aroma of cured vanilla beans, through GC-O analysis of a representative aroma extract from cured vanilla beans."​ \\+and [[http://​www.thegoodscentscompany.com/​data/​rw1057511.html|acetovanillone]],​ occurring at concentrations of 3.8-13.7 ppm, were similar in intensity to vanillin, which was detected at a concentration of more than 1000 times that of these compounds. Methyl salicylate, detected at a level of less than 1 ppm, was perceived as being as intense as vanillin. p-Cresol, methyl cinnamate and anisyl alcohol, occurring at concentrations of 1.1-2.4 ppm, were of medium intensity. Sweet, woody, balsamic, spicy, vanilla-like and toasted notes were attributed to phenolic compounds. Vanillic acid was not perceived by panellists, because its elution required a high temperature,​ which caused a burnt odour in the sniffing port. The aldehydes 2-heptenal and (E)-2-decenal,​ identified here for the first time in vanilla beans, were perceived as being of medium intensity, with green, oily and herb-like floral notes. Aliphatic, acetic, isobutyric, isovaleric and valeric acids were perceived by the panellists as having sour, buttery and oily notes. In conclusion, this study is in agreement with previous observations of the contribution of minor constituents to the overall aroma of cured vanilla beans, through GC-O analysis of a representative aroma extract from cured vanilla beans."​ \\
 [GC-MS and GC-olfactometry analysis of aroma compounds in a representative organic aroma extract from cured vanilla (Vanilla planifolia G. Jackson) beans., Pérez-Silva,​ A., Odoux, E., Brat, P., Ribeyre, F., Rodriguez-Jimenes,​ G., Robles-Olvera,​ V., Günata, Z., Food chemistry, Vol.99(4), 2006, 728-735] [GC-MS and GC-olfactometry analysis of aroma compounds in a representative organic aroma extract from cured vanilla (Vanilla planifolia G. Jackson) beans., Pérez-Silva,​ A., Odoux, E., Brat, P., Ribeyre, F., Rodriguez-Jimenes,​ G., Robles-Olvera,​ V., Günata, Z., Food chemistry, Vol.99(4), 2006, 728-735]
  
 By GC-MS and GC-O, 78 odorants were identified in traditionally cured Bourbon and Ungandan vanilla bean extracts. Vanillin was the most abundant followed by guaiacol (105/​169ppm) and the two isomers of 2,​3-butandiol (36/46ppm; plus their acetals with vanillin 30/14ppm). In the range of 1-10ppm were 3-methyl-2-butanone,​ acetoin, isovaleric acid, γ-butyrolactone,​ phenol, pantolactone,​ benzyl alcohol, 4-methylphenol,​ octanol, phenylethanol,​ benzoic acid, octanoic acid, 4-methylguaiacol,​ methyl salicylate, p-anisaldehyde,​ nonanoic acid, anisyl alcohol, cinnamyl alcohol, isovanillin,​ cinnamic acid, ethyl cinnamate, acetovanillone,​ methyl vanillate, cis-18-heptacosene-2,​4-dione,​ and cis-20-nonacosene-2,​4-dione. Carvacrol and β-damascenone were only found in Ugandan beans. Among the twenty-three most powerful odorants (medium or strong odor intensity, but <= 0.05ppm) were 3,​5-octadien-2-one,​ nonanol, γ-octalactone,​ 4-allylphenol,​ heliotropine,​ methyl decanoate, β-damascenone,​ and some nitrogen-containing compounds. "​Interestingly,​ of the six more concentrated strong odorants, namely, acetic acid, methyl salicylate, p-anisaldehyde,​ methyl trans-cinnamate,​ trans-cinnamic acid, and methylparaben,​ five were more abundant in the Ugandan vanilla beans, with p-anisaldehyde as the most different in terms of concentration."​ \\ By GC-MS and GC-O, 78 odorants were identified in traditionally cured Bourbon and Ungandan vanilla bean extracts. Vanillin was the most abundant followed by guaiacol (105/​169ppm) and the two isomers of 2,​3-butandiol (36/46ppm; plus their acetals with vanillin 30/14ppm). In the range of 1-10ppm were 3-methyl-2-butanone,​ acetoin, isovaleric acid, γ-butyrolactone,​ phenol, pantolactone,​ benzyl alcohol, 4-methylphenol,​ octanol, phenylethanol,​ benzoic acid, octanoic acid, 4-methylguaiacol,​ methyl salicylate, p-anisaldehyde,​ nonanoic acid, anisyl alcohol, cinnamyl alcohol, isovanillin,​ cinnamic acid, ethyl cinnamate, acetovanillone,​ methyl vanillate, cis-18-heptacosene-2,​4-dione,​ and cis-20-nonacosene-2,​4-dione. Carvacrol and β-damascenone were only found in Ugandan beans. Among the twenty-three most powerful odorants (medium or strong odor intensity, but <= 0.05ppm) were 3,​5-octadien-2-one,​ nonanol, γ-octalactone,​ 4-allylphenol,​ heliotropine,​ methyl decanoate, β-damascenone,​ and some nitrogen-containing compounds. "​Interestingly,​ of the six more concentrated strong odorants, namely, acetic acid, methyl salicylate, p-anisaldehyde,​ methyl trans-cinnamate,​ trans-cinnamic acid, and methylparaben,​ five were more abundant in the Ugandan vanilla beans, with p-anisaldehyde as the most different in terms of concentration."​ \\
 [Zhang, Suying, and Christoph Mueller. "​Comparative analysis of volatiles in traditionally cured Bourbon and Ugandan vanilla bean (Vanilla planifolia) extracts."​ Journal of agricultural and food chemistry 60.42 (2012): 10433-10444] [Zhang, Suying, and Christoph Mueller. "​Comparative analysis of volatiles in traditionally cured Bourbon and Ugandan vanilla bean (Vanilla planifolia) extracts."​ Journal of agricultural and food chemistry 60.42 (2012): 10433-10444]
 +
 +Correlating well with previously reported data from the literature, the "​good"​ vanilla samples contained high concentrations of acetic acid, 2-methoxy phenol, hydroxyl dihydromaltol,​ 5-(hydroxymethyl) furan-2-carbaldehyde,​ 4-hydroxybenzaldehyde,​ hexadecanoic acid, and 1-octadecanol. \\
 +"​Bad"​ vanilla beans were noticed with high concentrations of 2-methoxy phenol, 2-methoxy-4-methyl-phenol,​ hexadecanoic acid, and 1-octadecanol,​ as well as low concentrations of vanillin, hydroxyl dihydro maltol and hydroxymethyl furfural. \\ 
 +[S.J. Toth, Comparison and integration of analytical methods for the characterization of vanilla chemistry. Proquest, Uni Dissertation Publishing (2012)]
  
 | {{:​vanillin.jpg| vanillin}} \\ vanillin | {{:​guaiacol.jpg| guaiacol}} \\ guaiacol | {{:​valspice.jpg| 4-methyl guaiacol}} \\ 4-methyl guaiacol \\ //​(valspice)//​ | {{:​damascenone.jpg|}} \\ (E)-β-damascenone | {{:​ethylcinnamate.jpg|ethyl cinnamate}} \\ ethyl cinnamate | | {{:​vanillin.jpg| vanillin}} \\ vanillin | {{:​guaiacol.jpg| guaiacol}} \\ guaiacol | {{:​valspice.jpg| 4-methyl guaiacol}} \\ 4-methyl guaiacol \\ //​(valspice)//​ | {{:​damascenone.jpg|}} \\ (E)-β-damascenone | {{:​ethylcinnamate.jpg|ethyl cinnamate}} \\ ethyl cinnamate |
vanilla_planifolia_andrews.1549103475.txt.gz · Zuletzt geändert: 2019/02/02 11:31 von andreas