NIST/EPA/NIH EI-MS Library, 2026 release 431,277 electron ionization (EI) spectra 382,180 compounds, 49,097 replicate spectra 35,080 more compounds than the 2023 release 527,993 retention index (RI) values 216,093 compounds measured under a variety of conditions 188,198 compounds with both RI & MS...