Thermo Fisher DSQ II GC/MS System (Refurbished)
| Brand | Thermo Fisher |
|---|---|
| Origin | USA |
| Model | DSQ II |
| Mass Spectrometer Type | Single Quadrupole |
| Usage Duration | 3–4 years (Total Service Life: ~7 years) |
| Warranty | 6 months |
| Vacuum System | Dual-stage (Mechanical Pump + High-Performance Turbomolecular Pump) |
| Ion Source | Electron Ionization (EI), DuraBrite™ Design, Max Temp 300 °C |
| Mass Range | 1–1050 amu |
| Scan Speed | Up to 11,000 amu/sec |
| Sensitivity (EI, Full Scan) | ≥200:1 S/N for 1 pg Octafluoronaphthalene (OFN) |
| Resolution | Unit Mass |
| Detector | DynaMax™ EPT Electron Multiplier (Dynamic Linear Range: 10⁸) |
| GC Interface Max Temp | ≥300 °C |
| Software | Xcaliber™ + QuanLab™ Quantitation Suite |
| Compliance | Fully Compatible with ASTM D5845, EPA Methods 8270/8330, USP <621>, and GLP/GMP Data Integrity Requirements (21 CFR Part 11-ready audit trail) |
Overview
The Thermo Fisher DSQ II GC/MS System is a refurbished, fully validated single quadrupole gas chromatography–mass spectrometry platform engineered for high-fidelity qualitative and quantitative analysis of volatile and semi-volatile organic compounds. Built upon the Trace GC Ultra chromatograph and TriPlus autosampler architecture, the DSQ II integrates advanced ion optics—including a curved pre-quadrupole filter—to suppress neutral molecule background by approximately 6,000-fold, significantly enhancing signal-to-noise ratio in complex matrices such as environmental extracts, food residues, and pharmaceutical impurity profiles. Its mass analyzer employs a robust all-metal molybdenum quadrupole rod set, thermally stabilized and RF-tuned in real time via proprietary auto-calibration algorithms—ensuring mass axis stability across the full 1–1050 amu range without drift over extended acquisition periods. Unlike legacy single quad systems, the DSQ II maintains true simultaneous full-scan and selected-ion monitoring (SIM) acquisition without sensitivity compromise, enabling retrospective data mining while preserving quantitation integrity.
Key Features
- Bent pre-quadrupole geometry for effective neutral species rejection and improved detection limits in real-world samples
- Vacuum lock between ion source and quadrupole—enabling ion source cleaning without venting the mass spectrometer or disassembling the instrument enclosure
- DuraBrite™ ion source design with enhanced surface passivation, extending operational uptime and reducing maintenance frequency in high-throughput labs
- DynaMax™ EPT electron multiplier delivering a verified dynamic linear range of 10⁸—supporting accurate quantification from trace-level contaminants to high-concentration analytes within a single run
- Integrated automatic column evaluation and leak-check functions accessible via front-panel quick-access keys—eliminating manual calibration standards and pressure optimization steps
- High-precision electronic pressure and flow control (EPC/EFC) on GC with ±0.01 psi pressure resolution and ±0.01 mL/min flow resolution, compliant with ISO 17025 method validation requirements
- Column oven capable of ramping at up to 120 °C/min with 0.01 °C temperature stability—optimized for fast method development and high-resolution separations
Sample Compatibility & Compliance
The DSQ II accommodates standard 0.18–0.53 mm ID fused-silica capillary columns and supports both split and splitless injection modes, including large-volume injection (up to 50 µL) using programmed temperature vaporization (PTV) compatible inlets. It meets regulatory expectations for routine compliance testing under EPA Method 8270D (semivolatiles), ASTM D5845 (gasoline oxygenates), and USP (residual solvents). All hardware and software components are compatible with 21 CFR Part 11-compliant workflows when deployed with Xcaliber™ v2.9+ and QuanLab™ v1.5+, providing full audit trail logging, electronic signatures, and secure user access controls. The system has been refurbished and performance-verified per Thermo Fisher’s OEM-recommended protocols—including mass calibration, sensitivity verification with OFN, and vacuum integrity testing—and conforms to ISO/IEC 17025:2017 clause 6.4.10 for used instrument requalification.
Software & Data Management
Data acquisition and processing are managed through Thermo Fisher’s Xcaliber™ platform—a proven, memory-resilient environment supporting continuous 24/7 operation without system crashes. QuanLab™, bundled at no additional cost, extends Xcaliber’s capabilities with intuitive SIM/Scan method builder tools, multi-component calibration curve management, and automated peak integration using adaptive baseline algorithms. Raw data files (.RAW) retain full spectral fidelity and are natively compatible with third-party libraries including NIST 2005 (190,000 spectra, 160,000 chemical structures). All acquisition parameters, tuning reports, and audit logs are stored in encrypted, timestamped binary format with SHA-256 hash integrity verification—meeting GLP and GMP documentation traceability mandates.
Applications
This system is routinely deployed in environmental laboratories for pesticide residue screening in soil/water, in food safety labs for mycotoxin and flavor compound profiling, and in pharmaceutical QC environments for residual solvent analysis per ICH Q3C guidelines. Its high scan speed and dual acquisition mode make it suitable for fast GC–MS applications such as headspace analysis of volatile organic compounds (VOCs) in packaging materials or rapid screening of pyrolysis products in polymer characterization. The robust EI ion source and thermal stability also support extended unattended operation in contract research organizations performing multi-client sample batches under strict turnaround timelines.
FAQ
Is this a factory-refurbished unit or dealer-refurbished?
This DSQ II system was refurbished by SpectraLab Scientific using Thermo Fisher OEM service manuals, genuine replacement consumables (e.g., ion source kits, turbomolecular pump oil), and full functional validation against original factory specifications.
What documentation accompanies the instrument?
Each unit ships with a comprehensive refurbishment report, post-validation test results (including OFN sensitivity, mass calibration, vacuum hold test), NIST library license certificate, and signed statement of conformity to ISO/IEC 17025:2017 Annex A.2 for used instrument requalification.
Can the system be integrated into an existing LIMS environment?
Yes—the DSQ II supports standard ASTM E1384 and ASTM E1467 data export formats and includes OLE DB and SQL Server connectivity options for direct LIMS ingestion of processed results and raw metadata.
Does the 6-month warranty cover labor and parts globally?
The warranty covers all components and labor for defects in materials or workmanship. On-site technical support is available in North America, Western Europe, and select APAC territories; remote diagnostics and spare part dispatch are supported worldwide.
Are original Thermo Fisher service contracts transferable?
Pre-owned service contracts are not transferable; however, SpectraLab offers optional extended coverage plans aligned with Thermo Fisher’s PlatinumCare™ tiers, including preventive maintenance visits and priority response SLAs.
