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NIST Standard Reference Database 1A
NIST Mass Spectral Libraries, 2023 Edition with Search Program
Data Version: NIST23
Software Version: 3.0
This database is the product of an ongoing comprehensive evaluation and expansion of the world's most widely used mass spectral reference library.
NIST SRD 1A is available ONLY from distributors.
| Contents of the NIST23 Mass Spectral and Retention Index Libraries | ||
|---|---|---|
| Library Description | Library File Name | Library Contents |
| NIST/EPA/NIH (EI) Mass Spectral Library | ||
| Main EI MS Library | mainlib | 394,054 Spectra for 347,100 chemical compounds |
| Replicate EI MS Library | replib | 46,954 replicate spectra |
| Tandem (MS/MS) Mass Spectral Library | ||
| HRAM MS/MS Library - small molecules |
hr_msms_nist | 1,934,658 spectra of 210,195 precursor ions from 49,590 chemical compounds |
| Low Resolution MS/MS Library - small molecules |
lr_msms_nist | 433,692 spectra of 330,358 precursor ions from 49,865 chemical compounds |
| APCI High Resolution MS/MS Library - small molecules |
apci_msms_nist | 5,714 spectra of 1,121 precursor ions from 561 extractable and leachable compounds |
| Total: 2,374,064 spectra of 399,267 precursor ions from 51,501 chemical compounds | ||
| GC Method/Retention Index (RI) Library | ||
| Retention Index Library |
nist_ri |
491,790 RI values for 180,610 compounds; 153,472 compounds in the Main Library have retention index data. |
- Tandem (MS/MS) Mass Spectral Library and GC Method/Retention Index (RI) Library may be obtained as separate products.
Evaluation and Quality Control
- Each spectrum critically examined by experienced mass spectrometrists.
- Each chemical structure examined for correctness and consistency, using both human and computer methods.
- Spectra of all stereoisomers intercompared.
- Chemical names examined by experts and IUPAC names provided.
- Thousands of spectra replaced with higher quality measurements.
- Verified CAS registry numbers.
For more information, please visit:
http://chemdata.nist.gov
https://www.nist.gov/programs-projects/nist23-updates-nist-tandem-and-e…
https://www.nist.gov/programs-projects/electron-ionization-library-comp…
https://www.nist.gov/programs-projects/tandem-mass-spectral-library
The scientific contact for the database is:
Stephen E. Stein
Mass Spectrometry Data Center
National Institute of Standards and Technology
Gaithersburg, MD 20899-8362
(301) 975-2505
massspec [at] nist.gov (massspec[at]nist[dot]gov)
Keywords: analysis; chemical analysis; chemical databases; chemical structure; chemistry; mass spectra; mass spectrometry.