Volume 196, 1 April 2016, Pages 331–337
Evaluation of inorganic elements in cat’s claw teas using ICP OES and GF AAS
- Group of Analytical Spectrometry Applied, Faculty of Chemistry, Federal University of Pará, 66075-110 Belém, Pará, Brazil
- Received 22 November 2014, Revised 14 September 2015, Accepted 15 September 2015, Available online 16 September 2015
Highlights
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- Analysis of inorganic constituents in plants by ICP OES and GF AAS is developed.
- •
- Ba, Ca, Cu, Fe, Mg, Mn, P, Pb, Se and Zn are determined in eleven plant samples.
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- Teas were prepared by two methods (infusion and decoction).
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- Estimated intake of elements in teas compared with the daily recommended intake was assessed.
Abstract
The
determination of Ba, Ca, Cu, Fe, Mg, Mn, P, Pb, and Zn by inductively
coupled plasma optical emission spectrometry (ICP OES), and Se by
graphite furnace atomic absorption spectrometry (GF AAS), has been
carried out in dry matter and teas from 11 samples of the cat’s claw
plant. The accuracy and precision values were verified against GBW 07604
(Poplar leaves) certified reference material and by the recovery test.
Results showed a high content of Ca in the medicinal plant studied,
followed by Mg and P. The values obtained showed that the elements
studied have different concentrations depending on the method of tea
preparation. The highest levels were observed in Ca and Mg, and the
lowest for Se and Pb, by both infusion and decoction. Teas prepared from
this plant were found to be at safe levels for human consumption, and
may be suitable as sources of these elements in the human diet.
Keywords
- Plant;
- Tea;
- Multi-elemental analysis;
- ICP OES;
- GF AAS
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