Matricaria recutita L. (chamomile) decoction as a source of phenolic compounds
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resumo
Aromatic herbs have been used to prepare several infüsions and decoctions with claimed
beneficiai health effects, many of them attributed to the presence of phenolic compounds
(hydrophilic molecules highly abundant in those aqueous preparations) (Guimarães et al.,
2013). In fact antioxidant, antimicrobial and antitumor properties, among others, of
phenolic compounds have been extensively reported (Kahkonen et al., 1999; Rauha et al.,
2000). In the present work, Matricaria recutita L. (chamomile), one of the species mostly
used to prepare herbal drinks was characterized in terms of phenolic profile. Américo
Duarte Paixão Lda. (ADP) provided the samples, which were fúrther extracted by
decoction, lyophilized, re-dissolved in water (5 mg/mL) and analysed by HPLC-DADESI/
MS. Nineteen phenolic compounds were identified, among which were nine
flavonoids and ten phenolic acids. Phenolic acids were the major group present in M.
recutita decoctions (23.66 ± 0.27 mg/g lyophilized decoction), in which four compounds
were tentatively assigned as caffeoyl-2, 7-anhydro-3-deoxy-2-octulopyranosonic acids
(CDOA) derivatives, being a di-CDOA (6. 83 ± 0.05 mg/g) the main phenolic acid. Among
the flavonoids identified (17.89 ± 0.91 mg/g), luteolin-0-glucuronide (4.80 ± 0.54 mg/g)
was the major compound. To the best ofour knowledge, such type ofcompounds hás not
been previously reported in M. recutita flowers. Nevertheless, luteolin glycosides are
commonly found in relevant amounts in this matrix and in its iníüsions. Due to the wellestablished
bioactive properties ofphenolic compounds, M. recutita flowers could be used
in arder to obtain extracts with health-promoting properties or be incorporated into foods
as natural preservatives.
