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Related Concept Videos

Gas Chromatography–Mass Spectrometry (GC–MS)01:14

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Gas chromatography–mass spectrometry (GC–MS) is the combination of analytical techniques of gas chromatography and mass spectrometry in a single instrument for analyzing a mixture of compounds. The gas chromatograph separates the compounds in the mixture, and the mass spectrometer analyzes each compound separately to determine the molecular masses and molecular structures.
A gas chromatograph consists of a long, narrow capillary column with a polysiloxane coating on the inner wall....
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PTR-ToF-MS Coupled with an Automated Sampling System and Tailored Data Analysis for Food Studies: Bioprocess Monitoring, Screening and Nose-space Analysis
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Two-Dimensional GC-ToFMS Analysis of Volatile Organic Compounds in Fermented Camel Milk (Shubat).

Sagyman Zhadyra1,2, Fei Tao1, Ping Xu1

  • 1State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China.

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Summary

This study characterized the volatile compounds in traditional fermented camel milk (Shubat) from Kazakhstan. A stable core of 75 compounds was identified, revealing Shubat

Keywords:
GC×GC–TOF-MSHS-SPMEShubat fermented camel milkmetabolomicsvolatile organic compounds

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Area of Science:

  • Food Chemistry
  • Analytical Chemistry
  • Microbiology

Background:

  • Shubat, a fermented camel milk from Kazakhstan, possesses unique flavor and nutritional value.
  • Its volatile compound profile, crucial for sensory attributes, is not well understood.
  • Understanding Shubat's volatile metabolites is key to quality control and product development.

Purpose of the Study:

  • To identify and semi-quantify the volatile metabolites in Shubat.
  • To analyze the diversity and stability of the volatile compound profile across different regions.
  • To establish a chemical basis for future research on Shubat's sensory properties and microbial interactions.

Main Methods:

  • Headspace solid-phase microextraction (HS-SPME) for sample preparation.
  • Comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometry (GC×GC-ToFMS) for separation and detection.
  • Diversity (α and β) and UpSet analyses for data interpretation.

Main Results:

  • 202 volatile organic compounds were identified in Shubat samples.
  • Esters, acids, and alcohols were the most abundant chemical classes.
  • Significant regional variations in volatile profiles were observed, alongside a stable core of 75 shared compounds (over 87% of total content).

Conclusions:

  • Shubat exhibits a complex and regionally variable volatile metabolite profile.
  • A chemically stable core of volatile compounds suggests consistent quality attributes.
  • This research provides foundational data for further investigation into Shubat's microbiology, sensory characteristics, and quality standards.