MS1 precursor ion/s with 34S isotope pattern

[Mattesimone]

Hi,

I run massql tool (Commandline) to search for sulfur-containing signals with the following query:
QUERY scaninfo(MS1DATA) WHERE MS1MZ=X AND MS1MZ=X+1.996:TOLERANCEPPM=2
I'm attaching the unexpected output in which the difference between mz_lower and mz_upper mz is always 20.

Then I execute the same MassQL query against my data at GNPS but the job failed: ID=be0a38f7bdd2472da1f5cd5b4d58bdfc

Thanks in advance for help

Matteo

[mwang87]

Yes, your job just took too long on GNPS so it was killed. The mz_upper and mz_lower, are by definition above and below the "comment" which is the value of the X you found. Its mostly been used to make rendering much easier, though likely it should probably belong in an accompanying script rather than main MassQL.

To make it run faster, I'd recommend setting minimum peak intensity thresholds for your X peak.

QUERY scaninfo(MS1DATA) WHERE MS1MZ=X:INTENSITYPERCENT=5 AND 
MS1MZ=X+1.996:TOLERANCEPPM=2

[Mattesimone]

Hey Ming, thank you so much for helping me to understand better Mass Query Language output by querying MS1DATA. I like Mass Query Language (great job). Thank you for your suggestion. Matteo

…

On 18 Mar 2022, at 18:40, Ming Wang ***@***.***> wrote: Yes, your job just took too long on GNPS so it was killed. The mz_upper and mz_lower, are by definition above and below the "comment" which is the value of the X you found. Its mostly been used to make rendering much easier, though likely it should probably belong in an accompanying script rather than main MassQL. To make it run faster, I'd recommend setting minimum peak intensity thresholds for your X peak. QUERY scaninfo(MS1DATA) WHERE MS1MZ=X:INTENSITYPERCENT=5 AND MS1MZ=X+1.996:TOLERANCEPPM=2 — Reply to this email directly, view it on GitHub <#213 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ANR3TR76NQ7JTYRQ54YGXVDVAS52FANCNFSM5RB4PKIA>. Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub>. You are receiving this because you authored the thread.

[mwang87]

Awesome! Good luck with it and feel free to ask questions and contribute.