Analysis of components in natural food additive "grapefruit seed extract" by HPLC and LC/MS
Sakamoto, S.; Sato, K.; Maitani, T.; Yamada, T.
Eisei Shikenjo Hokoku. Bulletin of National Institute of Hygienic Sciences 114: 38-42
1996
ISSN/ISBN: 0077-4715 PMID: 9037863 Document Number: 468005
The components in a commercial natural food additive "Grapefruit seed extract" and the ethanol extract of grapefruit seeds were analyzed by HPLC and LC/MS. The HPLC chromatogram of the commercial grapefruit seed extract was quite different from that of the ethanol extract of grapefruit seeds. Three main peaks were observed in the chromatogram of the commercial grapefruit seed extract. By comparison of the retention times and the absorption spectra with those of authentic samples, two peaks were ascribed to methyl-p-hydroxybenzoate and 2,4,4'-trichloro-2'-hydroxydiphenylether (triclosan). Triclosan was also identified by LC/MS by using the negative electrospray ionization method.