This European Standard specifies an enzymatic method for the determination of the total content of L-malic acid, present either in the form of the free acid or its salts, in fruit and vegetable juices and related products.
DS/EN 1138:1995 history
1995DS/EN 1138:1995 Fruit and vegetables juices - Enzymatic determination of L-malic acid (L-malate) content - NADH spectrometric method