Stable carbon isotopic analysis and the botanical origin of ethanol in Brazilian brandies
Stable carbon isotopic analysis and the botanical origin of ethanol in Brazilian brandies
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DOI：
10.1016/s0963-9969(99)00143-x
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发表时间：
1999-01-01
影响因子：
8.1
通讯作者：
de Camargo, PB
中科院分区：
文献类型：
--
作者：
Pissinatto, L;Martinelli, LA;de Camargo, PB
巴西白兰地的碳同位素组成（δ (13)C）用于测定C3或C4植物的糖对其乙醇含量的贡献。C3植物的平均δ (13)C值为-27‰，而C4植物的平均值为-12‰。这种差异大到足以确定从植物中发酵的乙醇的来源。巴西有两种白兰地：一种叫“conhaque-de-gengibre”，可以使用任何植物中的乙醇；另一种叫“brandy”，只能使用葡萄中的乙醇。较便宜的白兰地被归类为“conhaque de gengibre”，其乙醇含量完全来自甘蔗（平均δ (13)C等于-12.9‰），而巴西白兰地则是甘蔗和葡萄的混合物（平均δ (13)C等于-18.0‰）。在巴西的“白兰地”中，其价格与碳同位素组成呈反比关系，表明较高的价格与葡萄中乙醇的比例较大有关。(C) 2000加拿大食品科学与技术研究所。Elsevier Science Ltd.出版。版权所有。
Carbon isotopic composition (delta(13)C) of Brazilian brandies was used to determine the contribution of sugar from C3 or C4 plants to their ethanol content. C3 plants have an average delta(13)C value of -27 parts per thousand, against an average value of -12 parts per thousand for C4 plants. This difference is large enough to permit determination of the origin of the ethanol fermented from plants. There are two types of brandy in Brazil: one called "conhaque-de-gengibre", where ethanol from any plant can be used, and another called "brandy", where only ethanol from grapes can be used. The less expensive brandies, classified as "conhaque de gengibre", have their ethanol content derived exclusively from sugar-cane (average delta(13)C equal to -12.9 parts per thousand), while in the Brazilian brandies it was a mixture of sugar-cane and grapes (average delta(13)C equal to -18.0 parts per thousand). In Brazilian "brandies" there was an inverse relationship between its price and the carbon isotopic composition, indicating that higher prices is associated to larger proportions of ethanol from grapes. (C) 2000 Canadian Institute of Food Science and Technology. Published by Elsevier Science Ltd. All rights reserved.