离子迁移谱仪快速检测橡木中威士忌内酯

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

离子迁移谱仪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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