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离子迁移谱仪快速检测橡木中威士忌内酯


来源: Bartosz Michalczuk et al  发布日期: 2019-11-21  访问量: 628


离子迁移光谱法(IMS)已用于检测空气中β-甲基-γ-辛烷(威士忌内酯-WL)标准物质以及橡木样品中产生的WL蒸气。IMS配备了基于电晕放电(CD)的大气压化学电离(APCI)离子源,并在正极性下工作...
标签: 离子迁移谱、IMS、威士忌内酯、异构化合物
 

Fast Quantification of Whisky Lactone in Oak Wood by Ion Mobility Spectrometer

离子迁移谱快速检测橡木桶中威士忌内酯
1,4Bartosz Michalczuk, 3Martin Sabo, 3Katarína Jatzová, 1Ladislav Moravský, 3Martina Gregorová, 1,2Štefan Matejčík
1Department of Experimental Physics, Comenius University, Mlynská dolina F2, 84248 Bratislava, Slovak Republic
2 National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 115409, Kashirskoe sh. 31, Moscow, Russia
3MaSaTech s.r.o., Sadová 3018/10 91501 Stará Turá, Slovak Republic
4Siedlce University of Natural Sciences and Humanities, Faculty of Exact and Natural Sciences, Siedlce, Poland.

Abstract
An Ion Mobility Spectrometry (IMS) apparatus has been used to detect the β-methyl-γ- octalactone (Whisky Lactone – WL) standard in the air and as well WL vapours originating from the oak wood samples. The IMS was equipped with Atmospheric Pressure Chemical Ionisation (APCI) ion source based on a Corona Discharge (CD) and was operated in the positive polarity. The IMS spectrum of WL exhibits two peaks, a monomer with reduced ion mobility value K0=1.39 cm2V-1s-1 and dimer K0=1.09 cm2V-1s-1. Using Ion Mobility orthogonal acceleration Time of Flight mass spectrometer (IMS-oaTOF MS) these peaks were identified as protonated monomer M.H+.(H2O)0,1 and dimer M2 .H+ ions respectively. The limit of detection study resulted in LOD for WL of 50 ppbv. Detection of WL from oak wood samples of different “Quality Level” (QL) categories (categories 1 to 10), indicated strong correlation between the QL category number and the response of the IMS.

离子迁移光谱法(IMS)已用于检测空气中β-甲基-γ-辛烷(威士忌内酯-WL)标准物质以及橡木样品中产生的WL蒸气。IMS配备了基于电晕放电(CD)的大气压化学电离(APCI)离子源,并在正极性下工作。WL的IMS谱有两个峰,一个是离子迁移率降低值K0=1.39cm2v-1s-1的单体,另一个是二聚体K0=1.09cm2v-1s-1。利用离子迁移率正交加速飞行时间质谱仪(IMS-oaTOF-MS)分别鉴定出质子化单体M.H+(H2O)0,1和二聚体M2.H+离子。由于检测研究的局限性,WL的LOD为50ppbv。从不同“质量水平”(QL)类别(类别1至10)的橡木木材样本中检测到WL,表明QL类别数与IMS的响应之间存在很强的相关性


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