Pegasus® GC-HRT+ 4D

High Resolution TOFMS

LECO’s most recent innovation in the gas chromatography sector, the Pegasus GC-HRT+ 4D, provides users with the unprecedented ability to investigate complex samples and identify unknown analytes. Combining the highest performance GCxGC and TOFMS on the market with High Resolution Deconvolution® (HRD®), users are able to find more analytes than ever before and identify components with ultimate confidence.

These advances in technology are paired with LECO’s ChromaTOF® brand software, which is tailored to get the most out of your High Resolution data when used in conjunction with NIST and Accurate Mass Libraries. 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.

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.


Click here to visit our ASMS Video Gallery featuring presentations by actual users.

Pegasus GC-HRT+ 4D Brochure

GC-TOFMS Technology Overview Brochure


For real-world application information using our products, please check out our e-seminar video gallery and technical presentations.


  • Encoded Frequent Pushing® (EFP®) technology greatly expands the analytical capabilities of LECO’s GC-HRT+ and GCxGC-HRT+ instruments, contributing to a significant increase of sensitivity, expanded dynamic range, wide mass range, and much more. Read more about EFP technology by downloading this Technical Brief.
  • High Resolution Deconvolution (HRD) deconvolutes and identifies important analytes in complex matrices.
  • 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.
  • Harness the power of accurate mass and high resolution mass spectrometry with SAT. This innovative toolkit, paired with ChromaTOF brand software, is designed to streamline identification and relative quantitation of heteroatomics species in either GC or GCxGC data sets. Learn more here.
  • KADAS®, our patented ion statistics-based data acquisition system, dramatically reduces noise, ensures mass accuracy, and reduces file size.
  • ChromaTOF brand software designed specifically for HRT+ instrumentation and GCxGC support, add advanced qualitative and quantitative capabilities to an all-in-one user-friendly datasystem.


Save time and effort in your laboratory by easily identifying unknowns and having more confidencein 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.


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


Do you want to have the ultimate confidence in your library hit? LECOs AML allows you to compare accurate mass new sample data against an accurate mass library data set. The AML rank provides a similarity score that uses accurate mass sample data the way it should be used.


  • Pegasus GC-HRT+ 4D with Liquid Nitrogen Thermal Modulator
  • Pegasus GC-HRT+ 4D with Cryogen-Free Modulator


Add-On Products
Below you will find various products and accessories that have been integrated into our Separation Science product line to give you the most powerful tools available on the market. 

Gas Chromatography
Gas chromatography featuring the 7890 GC system. Various inlets and injectors are also available.


LECO’s L-Pal3 Automated Sample Injector 

L Pal 3 sm

Increase the throughput in your lab with our L-PAL3 System


Sample Preparation & Automation
Sample preparation and automation solutions for GC and GC/MS designed to optimize performance, enhance productivity, and extend capabilities. Solutions include Liquid/Headspace/SPME injections, Thermal Desorption, and Automated Liner EXchange (ALEX).


Nitrogen Generators
Nitrogen generators that operate on house air or a built-in compressor.


There are no reviews yet.

Be the first to review “Pegasus® GC-HRT+ 4D”

Your email address will not be published. Required fields are marked *