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读了篇文献[Targeted and untargeted gas chromatography-mass spectrometry analysis of honey samples for determination of migrants from plastic packages(塑料包装蜂蜜样品中迁移物测定用靶向和非靶向[url=https://insevent.instrument.com.cn/t/Mp][color=#3333ff]气相色谱[/color][/url]-质谱分析)],[url=https://insevent.instrument.com.cn/t/Mp][color=#3333ff]气相色谱[/color][/url]分析采用Agilent 6890 N (Agilent, Waldbronn, Germany)[url=https://insevent.instrument.com.cn/t/Mp][color=#3333ff]气相色谱仪[/color][/url]与配备惰性离子源的Agilent 5973四极质选谱仪进行。【文献原文:2.2. Instrumentation and software:GC analyses were performed on an Agilent 6890 N (Agilent, Waldbronn, Germany) gas chromatograph coupled to an Agilent 5973 quadrupole mass selective spectrometer equipped with an inert ion source.】在非靶向分析那写的:根据文献,包括目标分析物和其他从塑料到食物的潜在迁移物的数据库,已创建(补充数据表S2)。利用NIST和Wiley质谱文库对所研究的蜂蜜样品中的m/z离子特征进行了监测,并对其进行了鉴定。共检出13种疑似化合物。[文献原文: 3.4.2. Untargeted approach :A database including the target analytes and other potential migrants from plastic into food, based on the literature, has been created (Supplementary data Table S2). Based on their characteristic m/z ions, all these compounds were monitored in the studied honey samples using the NIST and Wiley MS libraries for their identification. A total of 13 putative compounds were found.]文献中用的是低分辨质谱吧?低分辨质谱能进行非靶向分析吗?但是低分辨质谱不是需要标品吗?文献就只有靶向分析的标品,非靶向分析只有数据库也行吗?
各位做[url=https://insevent.instrument.com.cn/t/Mp][color=#3333ff]气相色谱[/color][/url]质谱的大佬们,我想用[url=https://insevent.instrument.com.cn/t/bp][color=#3333ff]GC-MS[/color][/url]方法做非靶向代谢检测,查文献到好多用[url=https://insevent.instrument.com.cn/t/bp][color=#3333ff]气质联用[/color][/url]方法的都是对样品中某一类目标物质进行检测的,比如对目标样品中脂肪酸、挥发性有机物、环氧氯丙烯、硝基苯类化合物等进行检测,但是我想测样品中所有的代谢组分,并且也没有标准品,不针对某一类特定的物质。但现在不知道如何下手,查到的文献大部分都是针对特定一类物质的检测,所以方法上能借鉴的不多,有没有做过类似研究的大佬,可以解解惑,提供一下方向,万分感谢!
用超高效[url=https://insevent.instrument.com.cn/t/5p][color=#3333ff]液相色谱[/color][/url]高分辨质谱非靶向代谢组学,内标物如何选择