Thermo Scientific Exactive LC/MS High-Resolution Mass Spectrometry System

Overview

The Thermo Scientific Exactive LC/MS system is a benchtop high-resolution liquid chromatography–mass spectrometry platform engineered for accurate mass measurement and structural elucidation in complex chemical and biological matrices. At its core lies the Orbitrap mass analyzer—a high-performance electrostatic ion trap that delivers Fourier-transform mass spectrometry (FTMS) performance in a compact, robust architecture. Unlike quadrupole or time-of-flight instruments, the Orbitrap achieves resolution up to 100,000 (FWHM at m/z 200) without sacrificing sensitivity or scan speed, enabling simultaneous acquisition of full-scan MS and MS/MS spectra with sub-ppm mass accuracy—calibrated internally or via lock-mass correction. Designed for seamless integration with ultra-high-performance liquid chromatography (UHPLC), the Exactive system supports scan rates up to 10 Hz, capturing ≥10 data points across typical UHPLC peak widths (<1 s), thereby preserving chromatographic fidelity while delivering unambiguous elemental composition assignment per scan.

Key Features

• Orbitrap mass analyzer delivering resolution up to 100,000 (FWHM) and mass accuracy < 3 ppm RMS (with internal calibration)
• Real-time accurate mass acquisition at 10 Hz scan rate—fully compatible with sub-second UHPLC peaks
• Fast polarity switching (<1 s cycle time) with maintained mass accuracy in both positive and negative ion modes
• Full-scan MS and data-dependent MS/MS acquisition within a single run—no compromise between identification and quantification workflows
• Integrated high-energy collisional dissociation (HCD) cell for comprehensive fragment ion generation
• Benchtop footprint with industrial-grade vacuum system and thermally stabilized optics for long-term stability

Sample Compatibility & Compliance

The Exactive LC/MS system accommodates a broad range of analytes—from small molecules (e.g., pharmaceuticals, metabolites, environmental contaminants) to intact peptides and post-translationally modified proteins. Its electrospray ionization (ESI) source operates reliably across diverse solvents and flow rates (50 nL/min–1 mL/min), supporting reversed-phase, HILIC, and ion-pairing chromatography. The system meets essential regulatory requirements for analytical laboratories: raw data files comply with ASTM E2524 (standard practice for mass spectral data exchange), support audit trails per FDA 21 CFR Part 11 when used with compliant software configurations, and enable GLP/GMP-aligned workflows through instrument method locking and electronic signature support in Thermo Scientific Compound Discoverer and TraceFinder software.

Software & Data Management

Data acquisition and processing are managed via Thermo Scientific Tune and Xcalibur software platforms, which provide real-time visualization, automated peak detection, and isotopic pattern-based molecular formula generation without user-defined element constraints. The system employs intelligent algorithms that rank candidate elemental compositions using exact mass deviation, isotope ratio fidelity (e.g., ¹³C/¹²C, ³⁷Cl/³⁵Cl), and signal intensity correlation—yielding unambiguous assignments in >90% of cases for compounds ≤1,000 Da. All raw data are stored in open-format .raw files, fully compatible with third-party tools including MZmine, OpenMS, and Skyline. Metadata—including instrument parameters, calibration history, and sequence logs—is embedded and exportable for traceability and reprocessing.

Applications

• Non-targeted screening and retrospective analysis of environmental samples (e.g., PFAS, pesticides, emerging contaminants)
• Metabolite identification in preclinical and clinical studies, including phase I/II biotransformation products
• Impurity profiling and degradation product characterization in pharmaceutical development (ICH Q3B/Q5C aligned)
• Peptide mapping and top-down proteomics for biopharmaceutical quality control
• Food authenticity testing and adulterant detection via high-resolution fingerprinting
• Forensic toxicology workflows requiring confirmatory identification per SWGTOX guidelines

FAQ

What resolution and mass accuracy can be achieved under routine operating conditions?

Typical resolution is 50,000–100,000 (FWHM at m/z 200), with mass accuracy consistently ≤2 ppm RMS using lock-mass correction and standard calibration protocols.
Is the Exactive system suitable for quantitative analysis?

Yes—it supports label-free and labeled quantitative workflows (e.g., AUC, HRAM-SIM) with inter-day precision <15% RSD for low-abundance analytes in complex matrices.
Does it support scheduled or triggered MS/MS acquisition?

Yes—data-dependent acquisition (DDA) and targeted MS/MS (tMS2) are fully supported, with dynamic exclusion and intensity-based triggering configurable in Xcalibur.
Can the system be upgraded to newer Orbitrap generations?

No—the Exactive is a fixed-architecture platform; however, firmware and software updates are maintained through Thermo’s legacy support program until end-of-life notice.
What regulatory documentation is provided with the instrument?

Each unit ships with Factory Acceptance Test (FAT) report, IQ/OQ documentation templates, and compliance statements referencing ISO/IEC 17025:2017 and EU GMP Annex 11 principles.