Integrating Fixed Time Windows in LabSolutions

[Tdaniel25]

Hi everyone,

I’m currently working on TPH quantification (C10–C40 range) using GC-FID with Shimadzu LabSolutions, and I’m running into an integration issue that I hope someone here has solved before.

For each TPH fraction, I need to integrate a fixed retention-time window (for example 3.00–3.50 min) rather than individual peaks. The problem is that LabSolutions keeps giving me messages like “peak not detected”, and then refuses to integrate the area for that time window.

I’ve already tried adjusting several integration parameters such as minimum area, threshold, peak width, etc., but the software still aborts integration whenever it doesn’t detect a clear peak in that region. What I need is very simple: force LabSolutions to integrate the signal between two retention times — even if no peak is detected.

So far I haven’t found a setting that tells LabSolutions to “integrate this interval no matter what”.

Has anyone dealt with this issue or knows if there’s a specific option in LabSolutions to enable forced time-window integration?
Any tips, hidden settings, or workflow suggestions would be greatly appreciated.

Thanks in advance!

[Tdaniel25]

Hi everyone,

Just to close the loop on this, I managed to solve the issue.

The workaround was to use band identification instead of relying "windows" on peak detection. For each TPH fraction, I defined an identification band with the exact retention time interval corresponding to that fraction (e.g. 3.00–3.50 min).

By doing this, LabSolutions no longer tries to detect individual peaks. Instead, it automatically integrates the total area within that defined time band, even when no clear peak is detected. This effectively forces the integration over the desired RT window and avoids the “peak not detected” error altogether.

This approach works well for TPH fraction quantification (C10–C40) where the signal is more of an unresolved envelope rather than discrete peaks.

Hope this helps anyone running into the same limitation.

Thanks!