Cited by 886Mass Spectrometry Techniques and ApplicationsMetabolomics and Mass Spectrometry StudiesSpectroscopy and Chemometric Analyses

Optimization and testing of mass spectral library search algorithms for compound identification

Stein, Stephen E., Scott, Donald R.·1994·Journal of the American Society for Mass Spectrometry

Abstract

Five algorithms proposed in the literature for library search identification of unknown compounds from their low resolution mass spectra were optimized and tested by matching test spectra against reference spectra in the NIST-EPA-NIH Mass Spectral Database. The algorithms were probability-based matching (PBM), dot-product, Hertz et al. similarity index, Euclidean distance, and absolute value distance. The test set consisted of 12,592 alternate spectra of about 8000 compounds represented in the database. Most algorithms were optimized by varying their mass weighting and intensity scaling factors. Rank in the list of candidatc compounds was used as the criterion for accuracy. The best performing algorithm (75% accuracy for rank 1) was the dot-product function that measures the cosine of the angle between spectra represented as vectors. Other methods in order of performance were the Euclidean distance (72%), absolute value distance (68%) PBM (65%), and Hertz et al. (64%). Intensity scaling and mass weighting were important in the optimized algorithms with the square root of the intensity scale nearly optimal and the square or cube the best mass weighting power. Several more complex schemes also were tested, but had little effect on the results. A modest improvement in the performance of the dot-product algorithm was made by adding a term that gave additional weight to relative peak intensities for spectra with many peaks in common.

Integrity signals

Registry

Crossref · 10.1016/1044-0305(94)87009-8

Cites

15 of 15 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Stein, S. E., & Scott, D. R.
Affiliations
  • Environmental Protection Agency (US)
  • National Institute of Standards and Technology (US)
Venue
Journal of the American Society for Mass Spectrometry
Published
1994-09-01
Volume
5
Issue
9
Pages
859-866
ISSN
1044-0305 (ISSN-L)
OpenAlex
W2028421938
Cited by
882
References
15
Citations by year
2026: 36 · 2025: 62 · 2024: 72 · 2023: 73 · 2022: 66 · 2021: 57 · 2020: 39 · 2019: 35 · 2018: 39 · 2017: 47 · 2016: 30 · 2015: 40 · 2014: 33 · 2013: 39 · 2012: 33
FWCI
2.65
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of the American Society for Mass Spectrometry (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • U.S. Environmental Protection Agency
  • National Institute of Standards and Technology
Topics
  • Physical Sciences › Chemistry › Spectroscopy › Mass Spectrometry Techniques and Applications
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolomics and Mass Spectrometry Studies
  • Physical Sciences › Chemistry › Analytical Chemistry › Spectroscopy and Chemometric Analyses
Keywords
mass spectral library search, compound identification, low resolution mass spectra, Euclidean distance, intensity scaling

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review