AI Article Synopsis
- An Ion Mobility Spectrometry (IMS) apparatus detected β-methyl-γ-octalactone (Whisky Lactone - WL) both in the air and from oak wood samples using a specialized ion source.
- The IMS spectrum revealed two peaks for WL: a monomer with ion mobility value K = 1.39 cmVs and a dimer with K = 1.09 cmVs, identified as protonated monomer and dimer ions through IMS-oaTOF MS.
- A limit of detection (LOD) study found that the minimum detectable concentration of WL was 50 parts per billion (ppb), and there was a strong correlation between the quality level of oak wood samples and the IMS response.
Article 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 K = 1.39 cmVs and dimer K = 1.09 cmVs. Using Ion Mobility orthogonal acceleration Time of Flight mass spectrometer (IMS-oaTOF MS) these peaks were identified as protonated monomer MH(HO) and dimer MH ions respectively. The limit of detection study resulted in LOD for WL of 50 ppb. 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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| http://dx.doi.org/10.1016/j.talanta.2019.120567 | DOI Listing |
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