Benedikt Engel

4 Questions 8 Answers 0 Followers

Questions related from Benedikt Engel

HPLC standard (mixture) for performance qualification test?

Has anyone experience in standards or standard mixtures for HPLC with UV detection for performing performance qualification tests? I am searching for e.g. a mixture of 2-3 compounds that is...

01 January 2020 8,669 4 View

Methanolysis and HPLC measurement?

I would like to perform methanolysis of proteins to get the monosaccharide building blocks. After methanolysis the monosaccharides are present as methyl glucosides - how can I analyze them by...

02 February 2019 876 1 View

Derivatization of cortisol and metabolites for GCMS?

We have problems with analyzing cortisol by GCMS. After performing a 2 step derivatization (methoximation and silylation) with methoxyamine hydrochloride and MSTFA, we do not see peaks in the...

12 December 2017 4,794 9 View

Does anybody know if there is a company which sells an amino acid standard with more than 30 amino acids?

Hi everybody! I have a question: I need an amino acid standard mixture for quantification experiments on a GC! We have a standard with 20 amino acids, but I would like to have one with more...

02 February 2016 3,438 3 View