Thermo Scientific Orbitrap Exploris 120 mass spectrometer

Significance of the topic

The ability to rapidly generate high-resolution, high-accuracy mass spectrometry data is critical for modern analytical laboratories addressing complex sample matrices. The Orbitrap Exploris 120 mass spectrometer redefines productivity by combining robust operational simplicity with advanced HRAM performance, enabling faster method development, reliable quantitation, and confident identification of trace analytes.

Study objectives and overview

This whitepaper evaluates the performance of the Thermo Scientific Orbitrap Exploris 120 mass spectrometer in a variety of applications. Key goals include demonstrating its:

• Resolving power and mass accuracy for qualitative screening
• Quantitative linear dynamic range and limit of detection
• Instrument robustness, uptime, and maintenance requirements
• Reproducibility across multiple laboratories
• Speed of data acquisition and polarity switching

Methodology and instrumentation

Samples spanning environmental, food safety, veterinary, and clinical matrices were analyzed using the Orbitrap Exploris 120 coupled to the Vanquish Core HPLC system. Key hardware features include:

• OptaMax NG electrospray ion source with interchangeable probes
• EASY-IC internal calibration for sub-ppm mass accuracy over five days
• Advanced Active Beam Guide to reduce chemical noise and improve ion transmission
• Ion-routing multipole for extended trapping and HCD fragmentation
• High-field Orbitrap analyzer delivering up to 120,000 resolution (FWHM) at m/z 200 with acquisition rates to 22 Hz

Data were acquired in full-scan, targeted-SIM, targeted-MS/MS, and DIA modes. Analysis utilized TraceFinder, Compound Discoverer, and Chromeleon CDS software, leveraging spectral libraries (mzCloud, mzVault) and customizable workflows.

Key results and discussion

High-resolution full-scan spectra resolved isobaric agrochemicals differing by 0.0112 Da at m/z 360.1770, reducing false positives. Quantitation of testosterone in serum achieved LLOQ of 0.01 ng/mL with sub-ppm accuracy and five orders of linear range. Calibration across m/z 40–3000 remained stable for five days without user intervention. Reproducibility tests over 250 injections of pesticides in olive oil showed average peak area RSDs below 3%. Cross-site comparisons of veterinary drug residues in bovine muscle yielded less than 5.1% inter-laboratory variance. Fast polarity switching at ~1.4 Hz and scan rates up to 22 Hz support accelerated sample throughput and shorter chromatographic gradients.

Benefits and practical applications

The Orbitrap Exploris 120 offers laboratories:

• Reduced method development time via ready-to-run templates and intuitive drag-and-drop method editor
• Minimal downtime through single-calibration workflows and easy maintenance access
• Enhanced confidence in non-targeted and targeted screening across environmental, food safety, pharmaceutical, industrial, and forensic applications
• Seamless data analysis with integrated software ecosystem for reporting, spectral matching, and quantitative compliance

Future trends and potential applications

Continued integration of AI-driven method optimization, cloud-based instrument monitoring, and advanced data mining will further streamline HRAM workflows. Spectral library expansions, retrospective data interrogation, and automated reporting will expand utility in emerging contaminant analysis and personalized medicine.

Conclusion

The Orbitrap Exploris 120 mass spectrometer sets a new standard in high-resolution, high-accuracy mass spectrometry by delivering robust performance, rapid throughput, and simplified operation. Its combination of advanced hardware, streamlined calibration, and powerful software tools addresses diverse analytical challenges and supports future innovations.