In the following we present the challenge data. Over the rest of the summer we will add a few more, stay tuned. Also, subscribe to the mailing list for announcements.

We have split the submenu above into Categories 1 and 2 for high-resolution LC/MS data, and Categories 3 and 4 for GC/EI-MS (nominal) mass data. Where available, we give experimental context, and provide several alternative data formats. You can use the Challenge spectra for each technique for either molecular formula or molecular structure determination, unless noted otherwise.