Identification and quantitation of diketopiperazines by liquid chromatography-mass spectrometry, using a moving belt interface
article
High-performance liquid chromatography in combination with mass spectrometry using a moving belt interface was applied to rapid profiling of diketopiperazines in cocoa powder. On-line high resolution measurements were used for the identification of Cyclo(-Pro-Leu), Cyclo(-Pro-Gly), Cyclo(-Pro-Phe), Cyclo(-Val-Phe), Cyclo(-Gly-Phe), Cyclo(-Ala-Val), Cyclo(-Ala-Gly), Cyclo(-Ala-Phe), Cyclo(-Asn-Pro) and Cyclo(-Ala-Pro) in cocoa powder extracts. Evidence for the presence of pyrrolidone and a diketopiperazine Cyclo(-Ala-Pro) with a double bond in the pyrrolidine ring has been obtained. ?? 1987.
TNO Identifier
230476
ISSN
00219673
Source
Journal of Chromatography A, 394(1), pp. 77-88.
Pages
77-88
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