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Related Concept Videos

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

Gas Chromatography–Mass Spectrometry (GC–MS)

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. The coating...
Mass Spectrometry: Complex Analysis01:21

Mass Spectrometry: Complex Analysis

Mass spectrometry is an important technique for the identification of pure compounds. However, it has some limitations for the analysis of complex mixtures, often due to excessive fragmentation making the spectrum too complicated to decipher. Mass spectrometry can be combined with suitable separation methods in sequence, forming hyphenated methods, which are useful in the analysis of complex mixtures.
GC–MS is a powerful hyphenated method commonly used in forensics and environmental...
Tandem Mass Spectrometry01:21

Tandem Mass Spectrometry

Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and reduce chemical noise during analyte detection. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.Secondary fragmentations occur in the interaction cell and can be induced by various factors. Fragmentation induced by collision with inert gases, such as N2, Ar, He, etc., is called...

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Chromatographic Fingerprinting by Template Matching for Data Collected by Comprehensive Two-Dimensional Gas Chromatography
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Chromatographic Fingerprinting by Template Matching for Data Collected by Comprehensive Two-Dimensional Gas Chromatography

Published on: September 2, 2020

Enabling direct access to proprietary GC-MS data through black-box reconstruction of the Chromatec binary format.

Andrey Samokhin1, Anastasia Sholokhova2, Roman Borisov3

  • 1Chemistry Department, Lomonosov Moscow State University, Moscow 119991, Russia; Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Moscow 119071, Russia.

Journal of Chromatography. A
|June 23, 2026
PubMed
Summary

Researchers reconstructed a proprietary gas chromatography-mass spectrometry (.msdx) data format, creating an open-source R package (msdxr). This enables reproducible data handling and analysis of legacy analytical instrument data.

Keywords:
Black-box reverse engineeringGC-MSPolychlorinated biphenylsProprietary data formatsR

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Area of Science:

  • Analytical Chemistry
  • Data Science
  • Environmental Science

Background:

  • Proprietary data formats from analytical instruments hinder data sharing and reproducibility.
  • Accessing raw data often requires complex reverse engineering without clear documentation.

Purpose of the Study:

  • To reconstruct the Chromatec .msdx binary format for gas chromatography-mass spectrometry (GC-MS) data.
  • To develop an open-source R package (msdxr) for parsing this proprietary format.
  • To demonstrate the utility of the parser for retrospective data analysis.

Main Methods:

  • Reverse engineering of the .msdx binary file structure.
  • Implementation of a data parser in R (msdxr package).
  • Validation of the parser against vendor software and application to an environmental dataset.

Main Results:

  • Successful reconstruction and documentation of the .msdx format.
  • Quantitative agreement between extracted data and vendor-exported data.
  • Demonstrated retrospective screening for polychlorinated biphenyls in legacy GC-MS data.

Conclusions:

  • Reconstructing proprietary formats enhances data portability and reproducibility.
  • Open-source tools facilitate integration with advanced data processing.
  • Long-term value of analytical datasets is increased by overcoming format limitations.