GC - MS法对不同产地大米的快速鉴定

摘要

The fat-soluble components of four rice species, including Wuchang rice, Meihe rice, Liaoning rice and Thailand rice, were analyzed by GC - MS method. By means of NIST mass spectral library and NIST mass spectral search program, four main fat-soluble contents such as palmitic acid, 9, 12-octadecadienoic acid, oleic acid, squalene and sitosterol in the rices were recognized. The fat-soluble components fingerprints were established for different rice species. The results indicated that there were diverse fingerprints for the rices from different places of origin. Therefore, an effective method was established for the identification of different rice species by using principal component a-nalysis and hierarchical cluster analysis.%采用GC - MS对4种不同产地大米中的脂溶性成分进行分析,并利用NIST标准质谱库和质谱图搜索程序进行检索.结果表明,大米中主要的脂溶性成分为棕榈酸、亚油酸、油酸、角鲨烯和谷甾醇.不同产地大米中脂溶性化合物的指纹谱图存在显著差异,通过主成分分析和聚类分析,建立了一种对不同产地大米进行快速鉴定的方法.