High-pressure liquid chromatographyic analysis of hydroxycinnamic acid—tartaric acid esters and their glucose esters in vitis vinifera

✍ Scribed by B.Y. Ong; C.W. Nagel

• Publisher: Elsevier Science
• Year: 1978
• Tongue: English
• Weight: 873 KB
• Volume: 157
• Category: Article
• ISSN: 1873-3778
• DOI: 10.1016/s0021-9673(00)92352-5

✦ Synopsis

A high-pressure liquid chromatographic technique has been developed to separate and quantify the amount of monocaffeoyl-, mono-p-coumaroyl-, and monoferuloyl-tartaric acid in grapes. The method features direct analysis of the grape juice with minimum sample preparation. The identity of the hydroxycinnamic acid-tartaric acid esters has been established through hydrolysis of the esters followed by gasliquid chromatography and high-pressure liquid chromatography. The absence of chlorogenic and neochlorogenic acids often reported in grapes has been substantiated. Evidence will be presented for the occurrence of an ester of caffeic ~acid-glucosetartaric acid. e