Hans Schmitthenner

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Questions related from Hans Schmitthenner

Does anyone know what range of collision cell energies would be recommended for MS/MS analyhsis of a tetrapeptide like CCK-4 on an MD-Sciex MS/MS ?

I am trying to develop an experiment in a teaching lab on MS/MS but do not have too much experience with 2-D Mass Spec. Can anyone recommend a set of conditions to see the main fragments in order...

15 March 2023 3,150 3 View

Does anyone have a review article or reference describing the acid stability of SPE C-18 cartridges?

I am trying to find sources which describe the instability of C-18 columns and SPE cartridges. I know there are a few like X-bridge BEH that are more stable down to pH2. In our hands a regular...

04 March 2020 7,838 2 View

Do I need to protect Fmoc-Arg in solid phase peptide synthesis ?

Hi - There was a prior question on the deprotection of arginine (or d-arginine) protecting groups. Does anyone know of any groups on Arg which can be cleaved by relatively mild acid deprotection...

01 January 1970 907 2 View