Atomic weight of arsenic

✍ Scribed by J.S.H.

• Book ID: 104129077
• Publisher: Elsevier Science
• Year: 1933
• Tongue: English
• Weight: 43 KB
• Volume: 216
• Category: Article
• ISSN: 0016-0032
• DOI: 10.1016/s0016-0032(33)90853-4

✦ Synopsis

Determination of Synthetic Malic Acid in Fruit Products.-Natural malic acid is laevo rotatory and occurs in various fruits. Synthetic malic acid is the racemic form, and is optically inactive. B. G. HARTMANN AND F. HILLIG (Your. Asso. Official Agric. Chem., I933, XVI, 277-285) have devised the following method for the detection and quantitative determination of added synthetic malic acid in fruits and fruit products. The total malic acid content is first isolated. Determination is then made of (a) total malic acid content by oxidation with potassium permanganate in alkaline solution, and (b) laevo malic acid content by the optical method. The synthetic, racemic malic acid content is then obtained by difference.

J. S. H.