In order to characterize the volatile compounds composition of lamb meat, 3 groups of baked leg muscle samples from two Polish native sheep breeds: Świniarka aged 9 months (S9), Wrzosówka aged 9 months (W9), and Wrzosówka aged 7 months (W7), were analyzed by HS-SPME-GC/MS, followed by multivariate statistics comprising the F-ratio method for variables pre-selection, and PCA-LDA analysis. Ninety seven volatile compounds were determined, out of which 74 were identified. The largest classes of volatile compounds were aldehydes and furans followed by alcohols, hydrocarbons, ketones, and sulfur and nitrogen compounds. Statistically significant differences between the S9, W9, and W7 groups were observed for 11 volatiles, i.e.: pentanal; hexanal; 1,3-octadiene; benzaldehyde; 3-ethyl-2-methyl-1,3-hexadiene; 3-octen-2-one; 2-octenal; 2-hexylfuran; tetradecanal; pentadecanal; hexadecanal. The HS-SPME-GC/MS method coupled with chemometrics, based on the relative intensity spectral data of these volatiles, proved to be an effective tool for the discrimination of lambs according to breed and age. The classification accuracy value for the S9, W9, and W7 groups was 100%.

中文翻译：

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使用HS-SPME-GC / MS对波兰本地绵羊品种中热处理过的肉中挥发性化合物的组成-基于品种和年龄的化学计量学分类

为了表征羔羊肉的挥发性化合物组成，从两个波兰本地绵羊品种的3组烘烤的腿部肌肉样品中：9个月大的Świniarka（S9），9个月大的Wrzosówka（W9）和7个月大的Wrzosówka（W7）通过HS-SPME-GC / MS进行分析，然后进行多元统计，包括用于变量预选择的F比率方法和PCA-LDA分析。确定了97种挥发性化合物，其中74种被确定。最大的挥发性化合物是醛和呋喃，其次是醇，烃，酮以及硫和氮化合物。观察到S9，W9和W7组之间11种挥发物的统计学显着性差异，即：戊醛；己醛 1,3-辛二烯; 苯甲醛 3-乙基-2-甲基-1,3-己二烯; 3-辛烯-2-一; 2八进制；2-己基呋喃; 四极体 十八管 十六烷。HS-SPME-GC / MS方法与化学计量学相结合，基于这些挥发物的相对强度光谱数据，被证明是一种根据品种和年龄区分羔羊的有效工具。S9，W9和W7组的分类准确度值为100％。