Trace element and mercury speciation analysis in yerba mate (Ilex paraguariensis)

Trace element and mercury speciation analysis in yerba mate (Ilex paraguariensis)

Background: Yerba mate, a popular beverage in South America, is rich in bioactive compounds and minerals. However, yerba mate leaves may contain toxic metals and environmental contaminants. This study performed multi-element analyses using ICP-MS and ICP OES and mercury speciation by GC-CV-AFS and C...

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Bibliographic Details
Main Authors: María Victoria Panzl, Jarol R. Miranda-Andrades, Wendy J. Sandoval Rojano, Joseane A. Mendes, Tatiana D. Saint'Pierre, Alejandra Rodríguez-Haralambides, Ricardo Q. Aucelio
Format: Article
Language:English
Published: Elsevier 2025-06-01
Series:Journal of Trace Elements and Minerals
Subjects:
Yerba mate
Speciation analysis
Essential and toxic elements
Cold vapor techniques
Inductively coupled plasma mass spectrometry
Optical emission
Online Access:http://www.sciencedirect.com/science/article/pii/S2773050625000084
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Summary:Background: Yerba mate, a popular beverage in South America, is rich in bioactive compounds and minerals. However, yerba mate leaves may contain toxic metals and environmental contaminants. This study performed multi-element analyses using ICP-MS and ICP OES and mercury speciation by GC-CV-AFS and CV–AAS to profile infusions of ten yerba mate samples consumed in Brazil and Uruguay. Materials and methods: For ICP OES and ICP-MS analyses, 500 mg infusions of samples were prepared and diluted with 10 % v/v HNO3. Ultrasonic-assisted extractions of mercurial species were made followed by distillation and dilution with water for CV-AAS. For GC-CV-AFS speciation, samples were extracted and distilled, using 200 μL aliquots for analysis. Results: The most abundant elements in the digested solid samples were K, Ca, and Mg, whereas in infusions the ranges were up to 9.18 mg g−1 for K, 0.68 mg g−1 for Ca, and 2.74 mg g−1 for Mg. Pb presented a mean concentration of 260 µg kg−1 in leaves but it was not found in infusions. Hg2+ was found from 0.67 to 0.96 μg kg−1 in leaves with one sample presenting 0.67 μg kg−1 of CH3Hg. Conclusion: K, Ca, and Mg were the most abundant elements in the yerba mate samples. Four samples showed ultra-trace concentrations of Hg2+ and one of CH3Hg.
ISSN:2773-0506

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