Use of Potassium Sorbate and Natamycin to Inhibit the Growth and Aflatoxin Production of Aspergillus parasiticus 299 in Improved Binagol


Author(s): Lutgada S. Palomar and Lloyd B. Bullerman

Abstract

Binagol (pH 6.3) was reformulated using lemon juice to lower the pH to 5.5, 5.0 and 4.5. Sensory evaluation was done to determine the acceptability of the binagol with lower pH, using the original binagol at pH 6.3 as the control. Sensory evaluation showed binagol can be acidified to pH 5.5 without noticeable differences from the original. Potassium sorbate and/or natamycin were used to inhibit growth and aflatoxin production by Aspergillus parasiticus in the original and modified binagol. Shelf life was improved by using the inhibitors at the lower pH. At pH 5.5., a combination of potassium sorbate and natamycin extended the shelf life of binagol to 21 days. A synergistic effect of increased aflatoxin inhibition was observed whn potassium sorbate and natamcyin were combine at half of the effective levels needed for each one alone.

Keywords : Aflatoxin. Aspergillus parasiticus. Binagol. Lemon juice. Natamycin. pH. Potassium sorbate.

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