以脐橙果皮为研究对象,比较了室温和热辅助表面解吸常压化学电离源(DAPCI)的解吸电离特性,结合串联质谱技术,对果皮中香气、糖、黄酮类等主要成分进行了鉴定,并通过主成分分析(PCA)方法对热辅助DAPCI-MS所获外果皮指纹谱图信息进行分析,进而区分了3个不同产地脐橙.结果表明,室温DAPCI-MS对脐橙果皮中的香气成分具有较强的解吸电离能力,而热辅助DAPCI-MS则更适合于分析果皮中的黄酮类和糖类及其衍生物.DAPCI-MS具有灵敏度高、分析速度快等特点,有望成为农产品品质快速检测与产地识别研究的新方法.
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