UV Test for Determining L-Malic Acid
L-Malic acid as a component of the citric acid cycle is an important substance in animals, plants and micro-organisms; it is one of the most important fruit acids and it is the acid with the highest concentration in wine. Stereo-specific L-malic acid can be produced biotechnologically/ enzymatically with fumarase by attaching water to fumaric acid (when synthesized chemically, the racemic D-/L-malic acid is produced).
L-Malic acid may be used in food production because it is a stronger acid than citric acid. Microbial decomposition of L-malic acid leads to the formation of L-lactate; this can e.g. be a desirable reaction in the production of wine (malo-lactic fermentation, biological de-acidification).
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