Multiple injection info on Thermo Q-Exactive

[Vladimir Gorshkov]

Dear all,

does any of you know of any reference information on the scan header information in Thermo RAW files from Q-Exactive instruments?

In particular, I am curious about Multiple Injection line. Usually, it looks similar to this - Multiple Injection:    ii

Exploring some raw files I can come with few observations.

Each "i" corresponds to an ion injection event, with corresponding injection times, i.e. "ii" - means two injections;

"h" - which I only observe in MS2 scans, seems to be connected to HCD injection.

Recently, I have found "im" MS1 scans, they also have multiple injection info, but what is the difference between "ii" and "im".

Does anybody know any source of information about it? I did search in the instrument manual and Google, but, unfortunately, could not find any systematic information about the meaning of scan header lines.

Any help is appreciated.

Best regards,

Vladimir