Thermo Scientific Orbitrap Exploris 120 Liquid Chromatography Mass Spectrometer

Overview

The Thermo Scientific Orbitrap Exploris 120 LC-MS system is a high-performance, benchtop hybrid mass spectrometer engineered for robust routine analysis and method development in regulated and research laboratories. It integrates the proven accuracy and reproducibility of Orbitrap mass analysis—based on electrostatic trapping and Fourier-transform detection—with a compact, service-friendly architecture optimized for daily operation. Unlike time-of-flight or quadrupole-based platforms, the Orbitrap analyzer delivers high-resolution accurate-mass (HRAM) spectra without reliance on transient digitization speed or flight-path vacuum constraints. Its fundamental operating principle centers on ion oscillation within a precisely shaped electrostatic field, enabling measurement of m/z via frequency-domain signal processing. This yields intrinsic mass stability, low chemical noise, and exceptional isotopic fidelity—critical for confident compound identification, quantitation, and isotopic ratio assessment across diverse sample matrices.

Key Features

• Orbitrap mass analyzer with up to 120,000 resolution (FWHM at m/z 200), delivering sub-ppm mass accuracy over 24 hours using internal lock-mass calibration
• Wide mass range of 40–3000 m/z, supporting small molecules, peptides, lipids, and metabolites without hardware reconfiguration
• High-speed polarity switching (<700 ms full-cycle, positive/negative full scans at R=60,000), enabling comprehensive dual-polarity profiling in a single run
• EASY-IC (Electron-Activated Internal Calibration) ensures long-term mass stability—<1 ppm RMS drift for ≥5 days without manual recalibration
• Intuitive drag-and-drop user interface with preconfigured, application-specific method templates (e.g., targeted quantitation, untargeted screening, lipidomics)
• Single-point calibration across the entire mass range eliminates multi-point tuning and reduces instrument downtime
• Optimized vacuum architecture and thermally stable ion optics maintain spectral reproducibility across hundreds of injections—even in complex biological or environmental matrices

Sample Compatibility & Compliance

The Orbitrap Exploris 120 interfaces seamlessly with standard UHPLC systems and supports ESI, APCI, and optional nano-ESI sources. Its dynamic range (>5000:1 within one scan) and low detection limits enable reliable quantitation from pg/mL to µg/mL levels in plasma, tissue extracts, food homogenates, and environmental water samples. The system complies with key regulatory frameworks for analytical data integrity: it supports 21 CFR Part 11-compliant audit trails when operated with Thermo Scientific Chromeleon CDS software; meets GLP/GMP documentation requirements for instrument qualification (IQ/OQ/PQ); and aligns with ISO/IEC 17025 method validation principles for precision, linearity, LOD/LOQ, and specificity. Optional isotopic ratio analysis workflows—leveraging soft ESI and HRAM—enable intramolecular isotope pattern preservation, facilitating applications in stable isotope tracing (e.g., ¹³C, ¹⁵N metabolic labeling) and geochemical fingerprinting.

Software & Data Management

Controlled via Thermo Scientific Tune and Xcalibur software, the system supports both real-time acquisition and post-run reprocessing with consistent peak integration and library matching. Raw data files (.raw) are fully compatible with third-party platforms including Compound Discoverer, Proteome Discoverer, and commercial metabolomics suites (e.g., SIMCA, MS-DIAL). All acquisition parameters—including retention time alignment, dynamic exclusion, and inclusion lists—are stored as metadata within the file structure, ensuring full traceability. Audit trail functionality records operator actions, parameter changes, and calibration events with timestamps and user authentication. Data export formats include mzML (PSI standard), CSV, and PDF reports compliant with laboratory information management system (LIMS) ingestion protocols.

Applications

• Targeted quantitative bioanalysis (e.g., pharmacokinetics, clinical toxicology) under FDA and EMA guidance
• Untargeted metabolomics and lipidomics in human serum, urine, and cell lysates
• Residue analysis in food safety (pesticides, veterinary drugs, mycotoxins) per EU SANTE/2023/12518 guidelines
• Environmental contaminant screening (PFAS, pharmaceuticals, microplastic additives) in wastewater and soil extracts
• Isotopic ratio measurements for metabolic flux analysis and authenticity testing (e.g., honey adulteration, wine origin verification)
• QC/QA monitoring in biopharmaceutical manufacturing (intact mAb analysis, glycoform profiling)

FAQ

Does the Orbitrap Exploris 120 support automated method optimization?
Yes—its intelligent acquisition engine (IAE) dynamically adjusts AGC targets, injection times, and isolation widths based on real-time signal intensity, reducing manual tuning during method development.
Can it be integrated into a GxP-regulated workflow?
Yes—when deployed with validated Chromeleon CDS and appropriate SOPs, it fulfills 21 CFR Part 11, Annex 11, and ISO 17025 requirements for electronic records and signatures.
What vacuum system configuration is required?
The system includes an integrated turbomolecular pump and dry scroll backing pump; no external oil-based roughing pumps are needed.
Is remote monitoring supported?
Yes—via Thermo Connect cloud-enabled diagnostics and secure VNC access for proactive service alerts and performance trending.
How does its resolution compare to earlier Orbitrap models?
At m/z 200, the Exploris 120 achieves 120,000 FWHM—matching the resolution of legacy Fusion Lumos systems while offering improved duty cycle and reduced maintenance intervals.