Hi:

Megazyme produce a beta-amylase kit-it may be suitable for your needs.

Kind regards

Simon. 

I am not familiar with barley, I am working with fruits.

Kind regards,

Milica

Hi Khaled,

alternatively to commercial kits you could consider the method reported by McGregor et al., 1971 (old but effective), available at the following link.

http://www.aaccnet.org/publications/cc/backissues/1971/Documents/Chem48_255.pdf

Kind regards,

Antonella

Dear Dr Antonella,

I would like to thank you for this link. Thank you for your cooperation

with best regards

Khaled

The simplest way around is the use of Betamyl-3; it is a β-amylase test kit that is suitable for the specific measurement and analysis of beta-amylase.