Mass spectrometry

Mass spectrometry
Francis William Aston · Public domain · source
Name	Mass spectrometer
Classification	Analytical instrument
Invented	20th century

Contents

Mass spectrometry is an analytical technique that measures the mass-to-charge ratio of ions to identify and quantify chemical species. It underpins research and applications across chemistry, biology, medicine, environmental science, and space exploration, and interfaces with instruments and institutions from Caltech to European Space Agency. Pioneering laboratories and awardees such as Ernest Rutherford, J. J. Thomson, Francis Aston, F. W. Aston, and recipients of the Nobel Prize in Physics and Nobel Prize in Chemistry advanced its development through collaborations involving University of Cambridge, Imperial College London, Massachusetts Institute of Technology, and Max Planck Society.

History

Early roots trace to experiments by J. J. Thomson at Cavendish Laboratory and later mass separation work at University of Manchester by Francis Aston, whose innovations influenced institutions like Royal Society and companies such as PerkinElmer and Thermo Fisher Scientific. Developments in vacuum technology at National Physical Laboratory and signal detection improvements at Bell Labs and Los Alamos National Laboratory enabled expansion into isotopic studies used by International Atomic Energy Agency and projects like Manhattan Project. Postwar growth was driven by analytical demands from DuPont, Monsanto, and pharmaceutical groups at Pfizer and GlaxoSmithKline, while space missions by NASA and European Space Agency used spectrometers on probes like Voyager, Cassini–Huygens, and Rosetta.

Principles rely on converting neutral species into charged particles, manipulating ions with electric and magnetic fields developed in work at CERN, Brookhaven National Laboratory, and Lawrence Berkeley National Laboratory, and measuring ion flight or oscillation as practiced in facilities including Stanford University and ETH Zurich. Instrument subsystems mirror engineering advances at Siemens, Hitachi, and General Electric in vacuum pumps, ion optics, and electronics. Instrument architectures derive from contributions by researchers affiliated with Columbia University, University of Oxford, Harvard University, and University of California, Berkeley.

Ionization sources evolved from early electron impact systems used at Bell Labs and Cambridge University to soft ionization methods like electrospray ionization developed by John Fenn (linked to Yale University and Nobel Foundation) and matrix-assisted laser desorption/ionization developed by Koichi Tanaka and Franz Hillenkamp with ties to Tohoku University and University of Frankfurt. Chemical ionization, fast atom bombardment, and atmospheric pressure techniques were refined in labs at University of Indiana, University of Tokyo, and University of Basel. Specialized sources for space missions were engineered by teams at Jet Propulsion Laboratory and European Space Agency.

Mass analyzers include sector instruments inspired by Ernest Rutherford era designs, quadrupole analyzers commercialized by Finnigan and VG Instruments, time-of-flight instruments developed at University of Manchester and Caltech, and Fourier transform ion cyclotron resonance instruments pioneered at National High Magnetic Field Laboratory and Bruker with links to ETH Zurich. Detectors evolved from electron multipliers and microchannel plates to superconducting sensors developed at IBM and University of Geneva. Hybrid systems combining quadrupole, ion trap, and orbitrap technologies reflect collaborations with Thermo Fisher Scientific, Agilent Technologies, and Sciex.

Data workflows employ algorithms and software influenced by research from Microsoft Research, Google, IBM Research, and groups at University of California, San Diego and Karolinska Institutet. Spectral databases and libraries are maintained by institutions such as NIST and NIH, and standards are set by bodies like ISO and IUPAC. Quantitation strategies use internal standards sourced from suppliers associated with Sigma-Aldrich and protocols developed at Centers for Disease Control and Prevention and Food and Drug Administration. Bioinformatics integration involves platforms from European Bioinformatics Institute and Broad Institute.

Applications span proteomics initiatives at Human Genome Project-era centers and Wellcome Trust-funded labs, metabolomics studies at European Molecular Biology Laboratory and Salk Institute, clinical diagnostics in hospitals such as Mayo Clinic and Johns Hopkins Hospital, and forensic analyses used by law enforcement agencies like FBI and Scotland Yard. Environmental monitoring draws on collaborations with Environmental Protection Agency and United Nations Environment Programme, while food safety testing involves World Health Organization guidelines. Industrial process control and petrochemical analysis link to corporations including Shell, ExxonMobil, and Chevron, and isotope ratio work supports geochemistry at US Geological Survey and paleoclimate studies connected to Smithsonian Institution.

Limitations include requirements for high vacuum influenced by advances at Pfeiffer Vacuum and challenges in ionization for certain analytes that spur research at MIT and Caltech. Future directions include miniaturized instruments for planetary exploration by NASA JPL and European Space Agency, integration with microfluidics developed at Harvard Medical School and Max Planck Institute, machine-learning driven interpretation from groups at DeepMind and Stanford University, and quantum-limited detectors investigated at National Institute of Standards and Technology and Los Alamos National Laboratory. Interdisciplinary efforts involve partnerships among University of Tokyo, Seoul National University, University of São Paulo, and multinational corporations to expand throughput, sensitivity, and portability.

Category:Analytical chemistry instruments