The NIST Mass Spectral Library is the world's most widely used and trusted resource for identifying mass spectra. The NIST 20 EI Library has 350,643 spectra for 306,869 compounds and over 447K literature and experimentally determined GC Methods and Retention Indexes for 139,963 compounds. NIST now records the RI values of all measured spectra, including the GC/MS Method with the spectrum when it is added to the user library. NIST 20 includes the standalone Mass Spectral Search Program, v.2.4, and the powerful AMDIS mass spectral deconvolution software.
The Mass Spectral Search Program, v.2.4, interfaces to several different mass spectrometer manufacturer's data analysis software and is compatible with third party mass spectral libraries such as Designer Drugs 2018 and the Robert Adams Flavor and Fragrance libraries.
NIST 20: NIST is preparing to release NIST 20, the latest version of the NIST Mass Spectral Libraries. It will be available after June 2, 2020.
For more information about NIST 20, please download the following handouts
If you purchased NIST17 from Diablo Analytical between January 1, 2020 and June 2nd, 2020, you are entitled to receive a free upgrade to NIST 20. We will be reaching out to you in the coming weeks to confirm details.
NIST 20 includes the following:
Main EI MS Library: Spectra for 306,869 compounds (39,493 new) chemical compounds.
Tandem (MS/MS) Library – 30,999 compounds (17,191 new).
Tandem (MS/MS) Library – 1,320,464 spectra (745,638 new).
Retention Index Library: This library includes 447,285 RI values for 139,963 compounds. - 111,788 Compounds with entires in both the RI & MS libraries. Also Includes the NIST RI Search Program, which is optimized for retention-index searches.
NIST MS-Search 2.4: The standalone NIST Mass Spectral Search Program.
AMDIS: The Automated Mass Spectral Identification and Deconvolution System.
Mass Spec Interpreter: A tool that allows an associated structure and spectrum to be evaluated with respect to fragmentation. Can me used with molecular or adduct ions (like MH+) with integer or accurate mass.
Click for more detail on NIST 17 Mass Spectral Library Software Components
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.
Available Configurations of the NIST Mass Spectral Library
The NIST Mass Spectral Library is available in four packages:
- Full version of the NIST Library for Mass Spectrometry (NIST 20), which contains all available libraries, namely the EI Libraries (mainlib and replib), The MS/MS Library, and the GC Methods/Retention Time Database. Optional macros are available for seamless integration of the NIST Library with Agilent ChemStation and MassHunter.
- Upgrade version of the NIST Library for Mass Spectrometry (NIST 20), which is the full version available at a significantly reduced price to anyone who provides evidence of prior ownership of NBS 98, NIST 02, NIST 05, NIST 08, NIST 11, NIST 14, or NIST 17. As in the case of the full license, optional macros are available for seamless integration of the NIST Library with Agilent ChemStation and MassHunter.
- NIST GC Methods/Retention Index Database is available separately, with expanded constraints to help narrow retention time search. With the results from the NIST Mass Spectral Library and the Retention Index Database, you can identify and confirm compound identity in one step.
- NIST MS/MS Library, available separately, is comprised of two databases. One has spectra for compounds over a wide range of collision energies, ranging from slight to complete dissociation of the precursor ion. The other has spectra of commercial peptides. Recently the NIST MS/MS library has been added to Thermo’s data system software for all tandem mass spectrometers.
Get the Most Out of Your NIST Mass Spectral Library
Have you wondered whether you are getting the best results from your NIST searches? Are there other ways to confirm the identity of your unknown compound? Wouldn’t it be nice to be able to read a spectrum? What is this hybrid search, anyway?
The answers to these questions and more are available through Mass-SpecTraining.com. Available either in a classroom setting, or Live-on-the-web, or self-paced, there is a format that will fit your location, schedule, and learning goals.
The Mass Spectral Interpretation Course is conducted by O. David Sparkman who is currently an Adjunct Professor of Chemistry at the University of the Pacific in Stockton, California; Contractor to the National Institute of Standards and Technology Mass Spectrometry Data Center; President of ChemUserWorld.com; and a former American Chemical Society Instructor (1978–2006) and American Society for Mass Spectrometry Member-at-large for Education (2004–2006).
- NIST Mass Spectrometry Data Center: http://chemdata.nist.gov/
- Introduction of NIST 17—A Major Update of Mass Spectral Libraries and Software—at the 65th ASMS Conference on Mass Spectrometry and Allied Topics
- Mass Spectrum Interpreter: This is a utility developed and used in the NIST Mass Spectrometry Data Center to assist in the evaluation of mass spectra. It finds possible structural origins of peaks in a mass spectrum and provides formula and isotopic processing utilities. It can operate in conjunction with the NIST MS Search Program or standalone.
- NIST 17 Demo Library (includes free copies of MS Interpreter, MS Search, v.2.3, and AMDIS)
- NIST 17 Reference Manual (PDF format)
NIST 20 and MS Search are NOT compatible with Windows 3.x, 95, 98, Me, NT 3.x, Windows NT 4.0, Windows 2000, and Windows XP before SP3.
NIST 20 and MS Search are fully compatible with Windows XP SP3, Vista, Windows 7 (XP, Vista, and Windows 7 in both 32- and 64-bit editions), Windows 8, and Windows 10*
* Issues with the custom scaling level feature of Windows 10 may have been observed. It is best to turn the custom scaling level feature in Windows 10 off.
Use of any NIST Mass Spectral Database is limited to a single computer by a single user at any one time. There is no restriction as to multiple copies in the same or multiple formats on the same single user computer or to backup copies which are for management purposes and not for use on any other computer. In the event of an upgrade from a previous version of any Database, that previous version of the Database may not be installed on another computer and used in the same time period as the upgrade. The previous version may continue to be used on the same single-user computer on which the upgrade is installed.
Diablo Analytical is an authorized distributor if the NIST Mass Spectral Library. You can purchase the Full version of NIST 20, or the Full version that includes the NIST 20 EI Library in the Agilent format (NIST20.L) for the Agilent Technologies MSD ChemStation and MassHunter data systems. Contact us about the availability of the NIST 20 EI Library in other formats.
The software can be shipped to you on either a DVD or a USB flash drive for compatibility with newer computers that lack a CD/DVD drive. Alternatively, you can download the software for a discounted price.
Note: The NIST 20 library installation is almost 2 GB in size, so take this into account when selecting the download option.
Upgrades: Contact Diablo Analytical if you would like to purchase an upgrade from an earlier version of the NIST Library to NIST 20.