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http://dx.doi.org/10.1016/j.jbc.2023.105422 | DOI Listing |
Food Chem
February 2025
Food Volatilomics and Sensomics Group, Faculty of Food Science and Nutrition, Poznań University of Life Sciences, Poznań, Poland. Electronic address:
Comprehensive two dimensional gas chromatography - time of flight mass spectrometry (GC × GC-TOFMS) with sample introduction using headspace solid phase microextraction (HS-SPME) was used for the botanical classification of raw spirits obtained from C3 (corn and sorghum) and C4 (rye, wheat and potato) plants. 45 spirit samples representing these raw materials (10 spirits produced from rye, corn, wheat and potato, and 5 from sorghum) were analyzed. Volatile compounds profiles were compared by PCA, and after removal of outliers samples were subjected to the classification model.
View Article and Find Full Text PDFMetabolomics
February 2024
Department of Chemistry, University of Alberta, Edmonton, AB, T6G 2G2, Canada.
Introduction: For many samples studied by GC-based metabolomics applications, extensive sample preparation involving extraction followed by a two-step derivatization procedure of methoximation and trimethylsilylation (TMS) is typically required to expand the metabolome coverage. Performing normalization is critical to correct for variations present in samples and any biases added during the sample preparation steps and analytical runs. Addressing the totality of variations with an adequate normalization method increases the reliability of the downstream data analysis and interpretation of the results.
View Article and Find Full Text PDFJ Chromatogr A
August 2023
High Explosives Science and Technology, Q-5, Los Alamos National Laboratory, Los Alamos, NM 87545, USA. Electronic address:
The analysis of thermally labile and high-boiling point compounds by gas chromatography (GC) can be a challenge. One technique to overcome these challenges is low-pressure GC, which uses the vacuum produced from the mass spectrometer and wide-bore columns to elute compounds at significantly lower temperatures. While GC-MS is a powerful technique, comprehensive two-dimensional gas chromatography (GC × GC), allows for resolution of compounds that would typically coelute using GC.
View Article and Find Full Text PDFForensic Sci Int
April 2023
Department of Analytical, Biopharmaceutical & Medical Sciences, Atlantic Technological University, Galway, Ireland. Electronic address:
This review describes recent advances and current trends in fire debris analysis from 2014 to 2021. Onsite analytical techniques used for fire scene investigation, identifying samples of interest for later analysis as well as onsite confirmatory techniques are examined. Laboratory techniques are reviewed both from a perspective of instrumentation and data analysis.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!