SciELO - Scientific Electronic Library Online

vol.22 issue2Activity and selectivity of catalysts based on modified kaolinSynthesis and characterization of organometallic tin (IV) compounds author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Química Nova

Print version ISSN 0100-4042On-line version ISSN 1678-7064


JACOME, Rose Lisieux. R. Paiva et al. Analysis of naphtoquimones in Zeyheria montana crude extracts (bolsa-de-pastor). Quím. Nova [online]. 1999, vol.22, n.2, pp.175-177. ISSN 0100-4042.

Four naphthoquinones, lapachol, a-lapachone, dehydro-a-lapachone and 4-hydroxy-a-lapachone were isolated from the ethanol extract of Zeyheria montana M. roots (Bignoniaceae) and were identified by spectroscopic methods. These naphthoquinones, except 4-hydroxy-a-lapachone, were quantified by HPLC, in the crude ethanol extracts of Z. montana roots. The separation of lapachol, a-lapachone and dehydro-a-lapachone was achieved and these compounds were identified in the chromatograms by their retention times and by their on line UV-spectra. The quantification of the three naphthoquinones, in four different samples showed medium contents of 11,0 mg of lapachol, 6,1 mg of a-lapachone and 4,3 mg of dehydro-a-lapachone, in 100 mg of Z.montana roots.

Keywords : Z. montana; Bignoniaceae; naphthoquinones; HPLC.

        · text in Portuguese


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License