AN L-AMINO-ACID ELECTRODE FOR MONITORING BEER FERMENTATION

A membrane covered amperometric L-amino acid electrode is described, e mploying L-amino acid oxidase immobilized on a Pt disc electrode with rabbit albumin and glutaraldehyde. The electrode response to a range o f L-amino acids and a theoretical treatment for the rate determining s tep are presented. Results are also given for the application of the e lectrode in monitoring beer fermentations, Appropriate amino acid util isation is vital for both yeast cell growth and beer flavour developme nt.