Thermo Fisher ISQ LT Single Quadrupole Gas Chromatography Mass Spectrometer (Used)

Overview

The Thermo Fisher ISQ LT is a high-performance single quadrupole gas chromatography mass spectrometer (GC-MS) engineered for robust, high-throughput laboratory environments. Based on electron ionization (EI) and chemical ionization (CI) principles, the system employs a compact, thermally stable quadrupole mass analyzer coupled with a precision gas chromatograph to deliver reliable compound identification, quantitation, and method transfer across diverse analytical workflows. Its core architecture integrates vacuum interlock technology—enabling full source removal without venting the mass spectrometer—thereby minimizing instrument downtime and supporting continuous operation in regulated and research laboratories alike. Designed for compatibility with standard 0.25–0.32 mm ID capillary columns and conventional GC oven temperature programs, the ISQ LT maintains consistent resolution and sensitivity across its full mass range of 1.2–1100 u, making it suitable for applications ranging from environmental contaminant screening to pharmaceutical impurity profiling.

Key Features

• Full Source Removal™ Technology: The entire ion source—including extractor lens, repeller, and filament assembly—can be removed and reinstalled in under 90 seconds without breaking vacuum, significantly reducing maintenance-induced downtime.
• ExtractaBrite™ Ion Source: A modular, ceramic-coated ion source design optimized for enhanced signal stability, reduced memory effects, and extended operational lifetime—particularly beneficial for trace-level analysis of complex matrices.
• Dual-Filament Electron Emission System: Independent micro-adjustment of two tungsten filaments ensures redundancy, prolonged source life, and consistent EI efficiency over extended run sequences.
• Simultaneous Full Scan / Selected Ion Monitoring (SIM) Acquisition: Enables concurrent qualitative screening and quantitative confirmation within a single chromatographic run—critical for compliance with EPA Method 8270, USP <621>, and ISO 17025 workflows.
• Pulsed Positive/Negative Ion Chemical Ionization (PPINICI): Standard configuration allows automatic alternation between PCI and NCI modes during one injection, facilitating molecular weight confirmation and selective detection of labile or low-ionization-efficiency compounds.
• S-Path Ion Optics: A curved ion transmission path suppresses neutral noise and improves signal-to-noise ratio, especially at low-mass ions (<50 u), without compromising transmission efficiency.
• High-Speed Data Acquisition: Supports up to 20 spectra/sec in full scan mode, fully compatible with fast GC methods (e.g., 10–20 cm/sec carrier gas linear velocity) and narrow-bore column configurations.

Sample Compatibility & Compliance

The ISQ LT accommodates a broad spectrum of sample introduction techniques, including split/splitless injectors, programmable temperature vaporization (PTV), headspace autosamplers, thermal desorption units, purge-and-trap systems, and solid-phase microextraction (SPME) interfaces. Its ion source supports both EI and CI modes—making it applicable to volatile and semi-volatile organic compounds (VOCs/SVOCs), pesticides, PCBs, PAHs, residual solvents, and controlled substances per ASTM D5845, EPA 524/8260/8270, and EU Directive 2002/657/EC. All firmware and software versions shipped comply with FDA 21 CFR Part 11 requirements for electronic records and signatures when deployed with QuanLab Forms or ToxLab Forms in validated environments. Instrument calibration and performance verification follow Thermo Fisher’s documented procedures aligned with ISO/IEC 17025:2017 clause 5.5.2 for measurement equipment.

Software & Data Management

The system operates with Thermo Fisher’s Xcalibur platform (v3.1.67 or later) and application-specific modules: QuanLab Forms for routine QC/QA quantitation, EnviroLab Forms for environmental compliance reporting, and ToxLab Forms for forensic toxicology workflows. All software packages support audit trail logging, user role-based access control, electronic signature capture, and raw data export in open formats (e.g., .RAW, .mzML). Data integrity is preserved through cyclic redundancy checks (CRC) during acquisition and storage. Optional integration with LIMS via Thermo Fisher’s Chromeleon CDS or third-party middleware (e.g., LabWare, STARLIMS) enables automated result routing and metadata synchronization.

Applications

• Environmental analysis: pesticide residue testing in soil/water per EPA Method 8270D; VOC analysis in drinking water (EPA 524.2); dioxin/furan screening (EPA 1613B).
• Pharmaceutical quality control: residual solvent quantitation (ICH Q3C), extractables/leachables profiling, and stability-indicating method development.
• Food safety: mycotoxin detection, flavor compound profiling, adulterant screening, and packaging migration studies.
• Forensic toxicology: rapid identification and quantification of drugs of abuse, metabolites, and novel psychoactive substances (NPS) in biological fluids.
• Academic and contract research: method development for natural product isolation, reaction monitoring, and synthetic pathway validation.

FAQ

Is this unit fully refurbished and tested prior to shipment?
Yes. Each ISQ LT system undergoes comprehensive functional verification—including tune report generation, mass calibration, sensitivity assessment (using DFTPP), and vacuum integrity testing—at SpectraLab Scientific’s ISO 9001-certified facility. A full test report and post-calibration certificate are provided.
What warranty is included with this used instrument?
A 90-day limited hardware warranty covers all original Thermo Fisher components, including the quadrupole analyzer, detector, electronics, and vacuum system. Exclusions include consumables (filaments, septa, liners) and damage resulting from improper installation or operation.
Can this system be integrated into an existing Thermo GC network?
Yes. The ISQ LT is fully compatible with Thermo Trace 1300/1310 GC systems and legacy Trace GC Ultra platforms via standard Ethernet (TCP/IP) or RS-232 interfaces. Firmware updates and driver compatibility are verified during pre-shipment testing.
Are original documentation and software licenses included?
All delivered units include original printed manuals, installation qualification (IQ) checklists, and valid software license keys for Xcalibur and application modules. License transfers are performed directly through Thermo Fisher Scientific upon customer registration.
Does the system include a vacuum pump?
Yes. The configuration includes an Edwards RV3 rotary vane vacuum pump with oil mist filter, properly serviced and tested to achieve base pressure ≤5×10⁻⁶ Torr prior to shipment.