LECO Pegasus III Time-of-Flight Gas Chromatography Mass Spectrometer (GC-TOFMS)

Overview

The LECO Pegasus III is a high-performance gas chromatography time-of-flight mass spectrometer (GC-TOFMS) engineered for comprehensive, untargeted analysis of complex volatile and semi-volatile organic mixtures. Unlike quadrupole or triple-quadrupole instruments operating in selected ion monitoring (SIM) or tandem MS (MS/MS) modes, the Pegasus III acquires full-spectrum data at up to 500 spectra per second across a mass range of m/z 10–1000 with unit mass resolution and sub-picosecond timing precision. Its orthogonal acceleration TOF architecture delivers high mass accuracy (1,500 FWHM at m/z 272), and exceptional sensitivity (sub-pg on-column detection for chlorobenzene). Coupled with an Agilent 6890 GC platform—including optional 7683 or CTC CombiPAL autosamplers—the system supports ultra-fast GC methods (e.g., EPA Method 8260B completed in ≤2 min separation, re-injection within 5 min), enabling high-throughput screening without sacrificing spectral fidelity or peak integrity.

Key Features

• High-speed TOF acquisition: Real-time full-spectrum recording at 500 Hz ensures ≥15 data points across narrow GC peaks (even under fast temperature ramps), eliminating undersampling artifacts.
• Electron ionization (EI) source with self-cleaning design: Stable, low-maintenance operation; no routine filament cleaning required during extended runs.
• True Signal Deconvolution™: Proprietary deconvolution algorithm resolves co-eluting compounds with retention time differences as small as 0.01 seconds, extracting clean, library-searchable mass spectra for each component.
• Automated Peak Find: Detects peaks below baseline noise threshold using adaptive signal-to-noise modeling; identifies >100,000 features per run in complex matrices.
• Matrix Management: Enables high-throughput non-targeted screening in samples with wide dynamic concentration ranges (e.g., petrochemicals, botanical extracts, environmental extracts) by suppressing dominant background ions while enhancing trace analyte signals.
• Comprehensive QC suite: Automated checks for instrument optimization, blank carryover, calibration stability, peak tailing, mass axis drift, retention index consistency, internal standard recovery, and routine tuning—fully logged with timestamped audit trails.

Sample Compatibility & Compliance

The Pegasus III is validated for use with diverse sample types requiring volatile/semi-volatile organic profiling: petroleum distillates, tobacco smoke condensate, fermented beverages, cosmetic volatiles, plant essential oils, herbal extracts (e.g., traditional Chinese medicine), and biological fluids (urine, plasma after solvent extraction). It complies with key regulatory frameworks for analytical method validation, including ASTM E260 (gas chromatography), ISO/IEC 17025:2017 (testing laboratory competence), and supports GLP/GMP-aligned workflows via chromaTOF’s secure user access control, electronic signatures, and 21 CFR Part 11-compliant audit logging when configured with appropriate IT infrastructure.

Software & Data Management

chromaTOF v4.7+ provides fully integrated control of the Agilent 6890 GC, autosampler, and TOFMS detector. All processing—including peak detection, deconvolution, library matching (NIST/EPA/WHO/Wiley), relative quantitation, and comparative analysis—is performed within a single interface. Peak tables export natively to Excel (.xlsx), CSV, or mzXML formats; reports are customizable using drag-and-drop templates. Raw data files (.tdf) are stored in vendor-neutral binary format with embedded metadata (acquisition parameters, instrument logs, calibration history). Data integrity is preserved through SHA-256 checksum verification and version-controlled project archives.

Applications

This refurbished Pegasus III system is routinely deployed in environmental laboratories for EPA 8260B/8270D analysis; in food and flavor R&D for aroma profiling and adulteration detection; in pharmaceutical QC for residual solvent screening; and in academic metabolomics for untargeted volatile organic compound (VOC) discovery. Its ability to deliver full-spectrum, high-fidelity data in a single injection makes it especially valuable where reference standards are unavailable—such as identifying unknown contaminants in recycled packaging materials or characterizing degradation products in polymer formulations.

FAQ

Is this a factory-refurbished unit or dealer-certified pre-owned equipment?
This is a dealer-certified pre-owned Pegasus III system, fully tested and functionally validated by SpectraLab Scientific against LECO OEM specifications.
What documentation accompanies the instrument?
Includes original LECO installation qualification (IQ) records, recent system suitability test (SST) reports, chromaTOF software license certificate, and full electrical/mechanical safety inspection logs.
Can the system be upgraded to support newer versions of chromaTOF?
Yes—hardware is compatible with chromaTOF v4.9 and later; software upgrades require valid LECO maintenance contract or one-time license purchase.
Does the 6-month warranty cover labor, parts, and on-site service?
Warranty includes all parts and labor for defects in materials or workmanship; remote diagnostics included; on-site service available at additional cost.
Are consumables (filaments, liners, columns) included in the sale?
No—consumables are not included but can be sourced through our inventory; we provide recommended starter kits upon request.