Qualitative analyses of less-volatile organic molecules from female skin scents by comprehensive two dimensional gas chromatography–time of flight mass spectrometry

Doležal, Petr; Kyjaková, Pavlína; Valterová, Irena; Urban, Štěpán

doi:10.1016/j.chroma.2017.04.062

Cited by 21 publications

(22 citation statements)

References 65 publications

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“…In these line-up identifications, the trained canines compared the fractioned starting scent (SS) samples with the "full" target samples (TS) and other distracting scents (DS) in the line-up. Before scent identification, the same scent samples were analyzed by comprehensive two-dimensional gaschromatography-time of flight mass spectrometry (GCxGC-TOFMS) and the results were discussed in our study (Doležal et al 2017). The partition of the individual fractions was based on this previous research.…”

Section: Resultsmentioning

confidence: 99%

“…The scent samples were taken from the volunteer's palms using 40 chemical cleaned glass beads as a sorbent (Bernier et al 1999;Doležal et al 2017). This sorption material (soda-lime glass, 4.86 ± 0.17 mm in diameter) was used for scent collection because, compared with the fabrics typically used (sterile gauze, gauze pads, or a blend of cotton, rayon, polyester, wool, etc.…”

Section: Preparation Of Human Scent Samplesmentioning

confidence: 99%

“…The purity of the cleaned glass beads was tested by GC/MS. The purification details are described in our previous study (Doležal et al 2017).…”

Section: Preparation Of Human Scent Samplesmentioning

confidence: 99%

“…1). The first fraction (to decanoic acid) are VOCs, the second fraction contains moderately volatile compounds, and the third "after squalene" fraction contains poorly volatile compounds such as fatty acid esters (Doležal et al 2017). The retention indices were calibrated using n-alkanes (C7-C40, Sigma-Aldrich, Merck, Germany).…”

Section: Preparations Of Scent Fractions Using a Preparative Gcmentioning

confidence: 99%

“…From a chemical perspective, the human scent is a complicated mixture of several thousand compounds that significantly differ Curran et al 2005;Doležal et al 2017;Gallagher et al 2008) in concentration and chemical properties. The human scent can usually be classified into primary, secondary, and tertiary categories (Curran et al 2005).…”

Section: Introductionmentioning

confidence: 99%

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Multiplicity of human scent signature

Doležal

Furton

Lněničková

et al. 2019

Egypt J Forensic Sci

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Background: In this paper, the term "human scent signature" refers to a group of chemical compounds in a human scent trace that are in certain relative concentrations that make an unambiguous identification of persons possible. At the present time, the scent identification of persons is performed using specially trained canines. However, the scent identification mechanism as well as the molecular composition of the human scent signature is entirely unrecognized. Delimitations of the group of chemical compounds according to their volatilities that specially trained canines use for the scent identification of persons were initially the main aim of this study. Methods: Eleven volunteer scent samples were split into three groups of chemical compounds, i.e., into three disjointed scent fractions with different volatilities of the compounds via preparative gas chromatography. The human scent signatures were searched in these separated scent fractions using six specially trained canines (female German Shepherds). Results: The canines were able to identify individual persons successfully using different scent fractions. From this fact, it follows that one scent trace can contain more than only one group of scent compounds that can be used for scent identification by the trained canines. This observed phenomenon was named as "the multiplicity of the human scent signature" in this study. The scent identification line-up procedure provided the following results: The poorly volatile fraction resulted in an 85% success rate in the scent identification procedure. The middle fraction resulted in a 58% success rate, and the highly volatile fraction resulted in a 30% success rate. Conclusions: In this study, it was found that the human scent sample contains more than one group of scent compounds; according to which the trained canines are able to identify human individuals. It means that the human scent sample contains more than only one scent signature. The authors of this research believe that results of this study will open a broad discussion about the multiplicity of the human scent signature, primary scent molecules, optimal canine training, and in general, the scent identification method in many countries.

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Section: Resultsmentioning

confidence: 99%

Section: Preparation Of Human Scent Samplesmentioning

confidence: 99%

“…The purity of the cleaned glass beads was tested by GC/MS. The purification details are described in our previous study (Doležal et al 2017).…”

Section: Preparation Of Human Scent Samplesmentioning

confidence: 99%

Section: Preparations Of Scent Fractions Using a Preparative Gcmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Multiplicity of human scent signature

Doležal

Furton

Lněničková

et al. 2019

Egypt J Forensic Sci

Self Cite

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The role of sample preparation in multidimensional gas chromatographic separations for non‐targeted analysis with the focus on recent biomedical, food, and plant applications

Franchina

Zanella

Dubois

et al. 2020

J of Separation Science

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In this review, we consider and discuss the affinity and complementarity between a generic sample preparation technique and the comprehensive two‐dimensional gas chromatography process. From the initial technical development focus (e.g., on the GC×GC and solid‐phase microextraction techniques), the trend is inevitably shifting toward more applied challenges, and therefore, the preparation of the sample should be carefully considered in any GC×GC separation for an overreaching research. We highlight recent biomedical, food, and plant applications (2016–July 2020), and specifically those in which the combination of tailored sample preparation methods and GC×GC–MS has proven to be beneficial in the challenging aspects of non‐targeted analysis. Specifically on the sample preparation, we report on gas‐phase, solid‐phase, and liquid‐phase extractions, and derivatization procedures that have been used to extract and prepare volatile and semi‐volatile metabolites for the successive GC×GC analysis. Moreover, we also present a milestone section reporting the early works that pioneered the combination of sample preparation techniques with GC×GC for non‐targeted analysis.

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Volatile compounds in different parts of the fruit Psidium guajava L. cv. “Media China” identified at distinct phenological stages using HS‐SPME‐GC‐QTOF/MS

Elizalde-González

Segura-Rivera

2018

Phytochemical Analysis

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The most abundant VOC released by the immature fruit in the plantation overnight was (S)-limonene, and it concentrated in the outer skin (pericarp). The esters ethyl benzoate, ethyl octanoate, butyl-2-methylbutanoate, ethyl hexanoate, cis-3-hexenyl acetate, and ethyl butanoate were emitted by ripe whole fruits. During ripening ethyl benzoate reached a maximum production after three to five days, while the formation of the aldehydes benzaldehyde, hexanal and trans-2-hexen-1-al started thereafter.

show abstract

Qualitative analyses of less-volatile organic molecules from female skin scents by comprehensive two dimensional gas chromatography–time of flight mass spectrometry

Cited by 21 publications

References 65 publications

Multiplicity of human scent signature

Multiplicity of human scent signature

The role of sample preparation in multidimensional gas chromatographic separations for non‐targeted analysis with the focus on recent biomedical, food, and plant applications

Volatile compounds in different parts of the fruit Psidium guajava L. cv. “Media China” identified at distinct phenological stages using HS‐SPME‐GC‐QTOF/MS

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