Fast quantification of whisky lactone in oak wood by ion mobility spectrometer

TALANTA

卷:209

Article

Michalczuk, Bartosz^1,4  Sabo, Martin³  Jatzova, Katarina³  Moraysky, Ladislav¹  Gregorova, Martina³  Matejcik, Stefan^1,2 

[1] Comenius Univ, Dept Expt Phys, Mlynska Dolina F2, Bratislava 84248, Slovakia

[2] Natl Res Nucl Univ, MEPhI Moscow Engn Phys Inst, Kashirskoe Sh 31, Moscow 115409, Russia

[3] MaSaTech Sro, Sadova 3018-10, Stara Tura 91501, Slovakia

[4] Siedlce Univ Nat Sci & Humanities, Fac Exact & Nat Sci, Siedlce, Poland

关键词: Whisky lactone;    Ion mobility spectrometry;    ims;    Atmospheric pressure chemical ionisation;    apci;    Mass spectrometry;   

DOI  :  10.1016/j.talanta.2019.120567

来源: Elsevier

【 摘 要 】

An Ion Mobility Spectrometry (IMS) apparatus has been used to detect the beta-methyl-gamma-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 K-0 = 1.39 cm(2 )V(-1) s(-1) and dimer K-0 = 1.09 cm(2) V-1 s(-1). Using Ion Mobility orthogonal acceleration Time of Flight mass spectrometer (IMS-oaTOF MS) these peaks were identified as protonated monomer M center dot H+center dot(H2O)(0,1) and dimer M-2 center dot 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.

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