Pegasus GC-HRT 4D Comprehensive GCxGC with High Resolution TOFMS

Pegasus GC-HRT 4D



ChromaTOF-HRT® brand software with High Resolution Deconvolution™ (HRD™)

Folded Flight Path™ Technology

Folded Flight Path™ Technology

20 m and 40 m flight paths (HR and UHR) TOF Mass Analyzer up to R=50,000 and Mass accuracy < 1ppm


LECO’s most recent innovation for Separation Science, Pegasus GC-HRT 4D mass spectrometry system provides users with the unprecedented ability to investigate complex samples, find more analytes and identify unknown components with ultimate confidence.

Pegasus GC-HRT 4D, combines the industry standard for comprehensive GCxGC with the highest performance time-of-flight mass spectrometer on the market.

With mass accuracies of 1 ppm and peak capacity potential at least two times greater than any mass spectrometer currently available on the marketplace, the Pegasus GC-HRT 4D is the solution to winning the fight against coelution and analyzing even the most complex samples.

Further features such as the generation of Pseudo-Molecular ions via Chemical Ionization, retention time matching, isotope patterns, and mass accuracy of deconvoluted fragments, all lead to confident identification.

Benefits :

Two-Dimensional Gas Chromatography
The dual stage-quadjet modulator and secondary oven are mounted inside the primary GC oven. Control of autosampler, GC, LECO’s GCxGC Thermal Modulator, and the Pegasus TOFMS is fully integrated within a single computer using LECO’s ChromaTOF-HRT software.

Patented Folded Flight Path (FFP ) TOF Mass Analyzer
Innovative time-of-flight keeps ion packets focused better than standard approaches and therefore the system is not susceptible to initial beam spread Dual Orthogonal Acceleration Optics, focuses more ions into TOF region

Chemical Ionization Source
Save time and effort in your laboratory by more easily identifying unknowns and having more confidence in your library hits. The chemical ionization (HR-CI) source for the Pegasus GC-HRT 4D allows users to dramatically change their high resolution GC/MS information with never before seen mass accuracy and resolution on pseudo-molecular ions. The Pegasus GC-HRT 4D is available with both electron ionization (EI) and chemical ionization (CI) sources, providing the option of comparison with classic library spectra (EI), and preservation of the molecular ion (CI). Together, the HR-CI source and the Pegasus GC-HRT 4D provide a complete package for high-throughput/high-information content analysis, with resolution up to 50,000 FWHM, mass accuracies less than 1 ppm, and acquisition rates up to 200 spectra/second—all with high-integrity isotopic abundance measurements to facilitate rich information content and high-confidence analyte identification.`


LECO Pegasus GC-HRT 4D  offers the most efficient comprehensive GCxGC chromatographic separation coupled with highest performance TOFMS 

These advances in technology, paired with LECO’s ChromaTOF-HRT® brand software and High Resolution Deconvolution™ (HRD™) is tailored to get the most out of your High Resolution data when used in conjunction with NIST and Accurate Mass Libraries.



  • High Resolution Deconvolution (HRD™) deconvolutes and identifies important analytes in complex matrices.
  • HR-EI and HR-CI source capabilities offer expanded flexibility
  • LECO’s Folded Flight Path® (FFP®) technology not only provides high resolution and sensitivity, but also provides higher orders of TOF focusing which prevents standard TOF dispersion and allows for broader initial conditions.
  • KADAS® our patented ion statistics based data acquisition system dramatically reduces noise, ensures mass accuracy, and reduces file size.
  • ChromaTOF-HRT brand software designed specifically for HRT instrumentation and GCxGC support, add advanced qualitative and quantitative capabilities to an all-in-one user-friendly data system.


LECO’s versatile instrumentation can be used to perform a wide range of applications. Please find below a selection of application notes for the most popular applications. Contact our sales and application specialists for more details.

Discovery of Environmental Pollutants at an Electronic Waste Recycling Facility by Pegasus® GC-HRT 4D

This study aimed to discover new and emerging organic contaminants in the environment of an e-waste recycling facility using comprehensive two-dimensional gas chromatography high resolution time-of-flight mass spectrometry. GC×GC-HRT is a powerful tool for the comprehensive analysis and chemical characterization of analytes in complex matrices.Learn more...

Utilizing the Pegasus GC-HRT 4D for Improved Yeast Metabolite Characterization

LECO's Pegasus GC-HRT 4D and ChromaTOF-HRT brand software demonstrated to be valid tools for molecular profiling of yeast. The combination of EI and CI-HRT high resolution, accurate mass data, facilitates rapid compound identification.Learn more...

Non-Targeted and Targeted Aroma Analysis of Name-Brand and Imitation Perfume Samples by GC×GC-HRT

High resolution HR-TOFMS delivered accurate mass data formula determinations and more confident identifications of unknowns. Ref: 203-821-500Learn more...

Improved Identification of Brand-Distinguishing Analytes in Perfume Samples with GC×GC and HR-TOFMS

High resolution TOFMS adds another layer of information to the analysis with accurate mass data that are used for definitive formulae determinations and confident analyte identifications.Learn more...

Options & models


Various options are available for this product. Contact our sales and application specialists to select the right configuration for your application.

Source types

Standard HR-EI (Electron Ionization)

Standard HR-CI (Chemical Ionization)


Each instrument can be configured to meet your individual lab needs. Contact our sales and application specialists to select the right configuration for your application.

Pegasus GC HRT 4D CF

Pegasus GC HRT 4D system including ChromaTOF-HRT software, the primary GC with mounted inside secondary oven and cryogen-free dual stage-quadjet thermal modulator


Pegasus GC HRT 4D LN2

Pegasus GC HRT 4D system including ChromaTOF-HRTsoftware, the primary GC with mounted inside secondary oven and liquid nitrogen dual stage-quadjet modulator