不同核桃仁香气物质的分析

Analysis of Substances of Three Walnuts Kernel Aroma

核桃仁营养丰富,风味独特,用途多样,在我国受到广大群众的青睐,核桃仁香气成为一大主要风味,分析核桃仁香气物质的成分成为开发核桃仁产品的热点。采用顶空固相微萃取气质联用技术分别检测陕西优种核桃仁、山西北方白三、云南杂果仁白二三种核桃仁香气物质,并对其进行分析,结果显示:陕西优种核桃仁、北方白三中有8种相同香气活性物质;北方白三、杂果仁白二中也有8种相同香气活性物质;陕西优种核桃仁、杂果仁白二中有11种相同香气活性物质。三种核桃仁均含5种相同的香气活性物质:异戊醇、庚醛、苯甲醛、柠檬烯、壬醛。但三种核桃仁香气活性物质所占比例有一定差异。通过对不同核桃仁香气物质的比较初步分析得到了核桃仁特征香气物质,为核桃产品的开发、质量控制提供理论基础和指导。

Walnuts are rich in nutrition with nice flavor and broad application,which are favored by masses of our country. Walnut kernel aroma has become one of major flavor. Analyzing the composition of walnut meat aroma is becoming a hot spot of walnut meat industry development. Aroma substances of three kinds of walnuts were detected and analyzed by SPME separated and identified by GC-MS. The three kinds of walnuts were Shanxi superior walnuts,North white three and Mixed white two. Eight kinds of substances with aroma active were both in Shanxi superior walnuts and North white three;Eight kinds of substances with aroma active were both in Mixed white two and North white three;Eleven kinds of substances with aroma active were both in Shanxi superior walnuts and Mixed white two.Five kinds of substances with aroma active were all in Shanxi superior walnuts,North white three,Mixed white two.These substances were detected and analyzed such as 3-Methyl-1-butanol,Heptaldehyde,Benzaldehyde,Cinene,Nonyl aldehyde. But the proportions of active substances of the three kinds of walnut meat aroma were different. This article obtained characteristic aroma of walnut meat by comparing aroma substances of different walnuts meat. It provided theoretical basis and a guidance and a quality control for the development of walnut products.