Snack fatty acid composition

Brazil nut (Bertholletia excelsa L.) is consumed either raw or roasted as a snack or used in a variety of confectionary products. Brazil nut contains a high amount of fat (65%-70%), which is rich in unsaturated fatty acids [39,40]. The only report on the volatile composition of Brazil nut was published by Clark and Nursten [41]. They compared both high vacuum distillation and Likens and Nickerson steam distillation for the extraction of the volatile compounds, and found the latter technique was more susceptible to artifact formation as evidenced by the presence of the lipid oxidation products 2,4-nonadienal and 2,4-decadienal in that extract. Both extracts were analyzed by gas chromatography-olfactometry (GCO) on both polar (Carbowax 20M) and nonpolar... 

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