Several pullulan standards kits are avalaible, see e.g. link bellow.

http://www.chem.agilent.com/en-US/products-services/Columns-Sample-Preparation/LC-LC-MS-Columns/GPC-SEC/Pullulan-Polysaccharide-Calibration-Kits/Pages/default.aspx

Ok, perfect, thank you very much... so far I have also found some oat beta glucan standards, which look interesting. Do you know maybe by any chance any additional branched polysaccharide standards?

Dear Victor,

I am sorry, I have no experience with others branched polysaccharide standards. Which kind of polysaccharides do you analyse?

Frantisek

Dear Frantisek,

at the moment we are working with dextrans and are just looking for further possibilities to analyze size standards. Thank you very much for your input.

Victor

Dear Victor,

do you look for polysaccharide standards to determine molar masses of your "branched polysaccharides by SEC?

Pullulans are available also from us., as well as Dextrans.

However, the problem with branched materiials is  that you  have to have standards of the the same chemical structure and degree of branching than the sample you would like to analyze.  

If you need to have accurate molar ,masses, calibration by any standard will not be helpful. Did you think about SEC-LS or SEC viscometry?

Wolfgang

Dear Wolfgang,

thank you very much for the information, I will have a look at the homepage of your company.

Victor