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Assay of caffeoylquinic acids in Baccharis trimera by reversed-phase liquid chromatography.
MedLine Citation:
PMID:  22169196     Owner:  NLM     Status:  Publisher    
Baccharis trimera commonly named 'carqueja', is wide-spread in South America and are used as raw material for herbal medicines. A reversed-phase liquid chromatography (RP-LC) method coupled to diode array detector was developed for the analysis of caffeoylquinic acids (CQAs), the main compounds responsible for its digestive activity. The identity of the quinic acids was established by mass spectrometry and were them: 5-O-[E]-caffeoylquinic acid, 3,4-O-[E]-dicaffeoylquinic acid, 3,5-O-[E]-dicaffeoylquinic acid, 4,5-O-[E]-dicaffeoylquinic acid and a tricaffeoylquinic acid. The RP-LC method for the quantitation of the caffeoylquinic acids was validated according to ICH guidelines, based on the following parameters: linearity, selectivity, robustness, limits of detection and quantification, precision and recovery. Hydroalcoholic extracts were prepared by the maceration of the plant material with ethanol:water 1:1 (v/v) in a 0.1:25gmL(-1) plant:solvent ratio in a water bath at 40°C. Validation data indicated that the HPLC method proposed is suitable for the analysis of caffeoylquinic acids in B. trimera raw material. The results of the LOD and LOQ analyses for the 5-CQA were 4.1μgmL(-1) and 12.5μgmL(-1), respectively, 1.3μgmL(-1), 3.9μgmL(-1) for 4,5-diCQA and 1.7μgmL(-1), 5.1μgmL(-1) for triCQA. The levels of total CQAs ranged from 2.1 to 4.0g% (w/w). The influence of season harvest and site collection was also evaluated and variations were observed in the results and can be related to phonologic phase, different locations, seasons and soil. Long term and photostability of plant material were carried out and was observed a stable behavior during the time of the experiments.
Ana Lúcia Aboy; Miriam Anders Apel; Sílvia Debenedetti; Leandro Francescato; María Adelaida Rosella; Amélia Teresinha Henriques
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-11-28
Journal Detail:
Title:  Journal of chromatography. A     Volume:  -     ISSN:  1873-3778     ISO Abbreviation:  -     Publication Date:  2011 Nov 
Date Detail:
Created Date:  2011-12-15     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9318488     Medline TA:  J Chromatogr A     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011 Elsevier B.V. All rights reserved.
Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.
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