Does ethanol precipitation in the Mixed Linkage β-Glucan procedure (K-BGLU) remove low weight beta glucans?

Ethanol precipitation will cause low beta-glucans to be removed and therefore wont be measured. We cannot provide the information about molecular weight cut off point, as we have not measured it.

Alternatively, borohydride reduction be used instead of ethanol precipitation. 

Please note that the borohydride reduction method will also underestimate the oligosaccharide content. This underestimation is due to the reduction of terminal reducing sugars in the oligosaccharides to sugar alcohols (sorbitol), which are not measured in the current assay. The underestimation will depend on the degree of hydrolysis of the original beta-glucan.