GC retention index August 31, 2022, 08:38:07 AM Hello everyone,I am working with GC and use Alkane standards to get retention indices. In the MS-DIAL tutorial it is explained, how the retention indices are calculated. However, I can't find info on how extrapolation is done. For example, my Alkane index file is starting from C8 but MS-DIAL is then also calculating retention indices for compounds with lower retention time. I hope someone can explain to me how this is calculated.Thank you!Bernadette