NIST23 includes:
- 394K electron ionization (EI) spectra, with 347K compounds and 47K replicate spectra, an increase of 40K NIST measured and evaluated compounds;
- 492K retention index (RI) values for 153K compounds, a 40K increase;
- AI-RI estimates for all EI compounds, plus expanded compound classes;
- MS/MS spectra for 51K compounds, 60% more than the NIST20 library, with 400K precursor ions and 2.4M spectra; and
- spectral analysis software tools: NIST MS Search, Hybrid Search, MS Interpreter, and AMDIS.