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Chemical composition and volatile constituents of canned mango juice

✍ Scribed by Ragab, M. ;El-Nemr, S. E.


Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
434 KB
Volume
34
Category
Article
ISSN
0027-769X

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✦ Synopsis


The chemical composition of mango (Mmg$era indica L.) pulp and canned mango juice were evaluated. Cannedmango juice was characterized by a lower content of ascorbic acid, free amino nitrogen, reducing sugars and carotenoids than the mango pulp, while the latter was characterized by lower natural total soluble solids, higher pH, lower total sugars and lighter color. The volatile composition ofcanned mango juice was investigated by means ofstandard-controlled distillation-extraction, liquid-solid chromatography and gas chromatographymass spectrometry. This combination led to the characterization of 64 volatiles, of them 21 hydrocarbons, 25 alcohols, 12 esters, 2 aldehydes, 2 lactons and 2 other compounds. The volatile components of canned mango juice were quantitatively determined in range of2260 ppb to 10 ppb. Limonene, myrcene, cisand trans-ocimene, /3-caryophellene and a-terpinolene were the major hydrocarbons ofcannedjuice; meanwhile, methyl butanoate i-ethyl 2-methyl butanoate, furfural, a-terpineol and y-octalacton were the abundant oxygenated compounds. Die Nahrung 34 (1990) 7 Es wird die chemische Zusammensetzung von Mango (Mangifera indica L.)-Pulpe und Mangojuice-Konserve untersucht. Mangojuice weist geringere Gehalte an Ascorbinsaure, freiem Aminostickstoff, reduzierenden Zuckern und Carotenoiden auf als Mangopulpe, wahrend letztere niedrige Gehalte an loslichen Feststoffen und loslichen Gesamtzuckem, einen hbheren pH-Wert sowie eine hellere Farbe besitzt. Die Zusammensetzung der fliichtigen Bestandteile von Mangojuice wird durch standardisierte destillative Extraktion, fliissig/fest-Chromatographie und Gaschromatographie/Massenspektrometrie ermittelt. Diese Kombination fiihrt m 64 fliichtigen Stoffen, darunter 21 Kohlenwasserstoffe, 25 Alkoholen, 12 Estern, 2 Aldehyden, 2 Lactonen und 2 weiteren Verbindungen. Die fliichtigen Komponenten von Mangojuice werden quantitativ in Mengen von 2260 ppb bis herab zu 10 ppb bestimmt. Limonen, Myrcen, cis-und trans-Ocimen, B-Caryophyllen und a-Terpinolen sind die wichtigsten Kohlenwasserstoffe im Juice; Methylbutanoat + Ethyl-2-methylbutanoat, Furfural, a-Terpineol und y-Octalacton sind dagegen reichlich vorkommende sauerstoffhaltige Verbindungen.


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