Evaluation of inorganic elements in cat's claw teas using ICP OES and GF AAS

João B Pereira Jr; Kelly G F Dantas

doi:10.1016/j.foodchem.2015.09.057

Evaluation of inorganic elements in cat's claw teas using ICP OES and GF AAS

Food Chem. 2016 Apr 1:196:331-7. doi: 10.1016/j.foodchem.2015.09.057. Epub 2015 Sep 16.

Authors

João B Pereira Jr¹, Kelly G F Dantas²

Affiliations

¹ Group of Analytical Spectrometry Applied, Faculty of Chemistry, Federal University of Pará, 66075-110 Belém, Pará, Brazil.
² Group of Analytical Spectrometry Applied, Faculty of Chemistry, Federal University of Pará, 66075-110 Belém, Pará, Brazil. Electronic address: kdgfernandes@ufpa.br.

PMID: 26593498
DOI: 10.1016/j.foodchem.2015.09.057

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: GF AAS; ICP OES; Multi-elemental analysis; Plant; Tea.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Beverages / analysis
Cat's Claw / chemistry*
Graphite
Humans
Metals / analysis*
Plants, Medicinal / chemistry*
Recommended Dietary Allowances
Sensitivity and Specificity
Spectrophotometry, Atomic / methods
Uncaria / chemistry*

Substances

Metals
Graphite