Studies on Preservatives of Alcoholic Beverage

Water-soluble Derivatives of p-Hydroxybenzoic Acid Esters as Antimicrobial Drug against Hiochi Bacteria in Sake

Abstract

Antimicrobial effect of water-soluble derivatives of p-hydroxybenzoic acid esters on the growth of Hiochi bacteria was investigated, among which mainly a p-heptoxycarbonyl phenyl phosphate (PP-7) was used.
(1) From the experiments on various kinds of factor for the antimicrobial activities, the PP-7 was found to inhibit the growth of Hiochi bacteria at the concentration near 35ppm in Sake, and to have 5-10 times strong antimicrobial activity compared with that of salicylic acid (SA).
(2) The antimicrobial action of PP-7 against Hiochi bacteria in Sake was bacteriostatic, similarly to that of SA.
(3) By the results of sensory test, PP-7 did not show any bad influence on the qualities of Sake at the concentration near 35ppm.
It is concluded, thus, that the PP-7 seems to be a new and good preservative for Sake.