Yes you can for
the physiological fluid system, by ordering part number 80-2037-62. Alternatively
you can obtain this standard as 2 parts from Sigma. The Sigma Part Numbers are A6407 (Physiological: Acidics and
Neutrals ) & A1585 (Physiological: Basics ).
For the Protein Hydrolysate standard and other standards, these can be
purchased direct from Sigma. The Sigma Part Number for the Protein Hydrolysate standard is AAS18.
If this does not answer your question or solve your problem, then please contact us at support@biochrom.co.uk detailing your question or the problem you are experiencing. Please list if relevant the instrument, software and version numbers you are running, and enclose any relevant data files, etc.