Determination of Cu2+ and Zn2+ in Flaxseed Flour by FAAS and DPASV using Different Sample Treatments

Fabio Antonio Cajamarca Suquila; Leticia Alana Bertoldo; Luana Rianne da Rocha; Alexandra Beal; Milena do Prado Ferreira; Renan Mendes Ruiz; Tainara Capelari; César Ricardo Teixeira Tarley

doi:10.5433/1679-0375.2023.v44.47941

Determination of Cu2+ and Zn2+ in Flaxseed Flour by FAAS and DPASV using Different Sample Treatments

Authors

Fabio Antonio Cajamarca Suquila National Pedagogic University - UPN https://orcid.org/0000-0003-1433-4995
Leticia Alana Bertoldo State University of Londrina - UEL https://orcid.org/0000-0003-0710-8113
Luana Rianne da Rocha State University of Londrina - UEL https://orcid.org/0000-0002-0828-6379
Alexandra Beal Federal Technological University of Paraná - UFTPR https://orcid.org/0000-0002-7156-6955
Milena do Prado Ferreira State University of Londrina - UEL https://orcid.org/0000-0002-6058-746X
Renan Mendes Ruiz State University of Londrina - UEL
Tainara Capelari State University of Londrina - UEL https://orcid.org/0000-0003-1484-4311
César Ricardo Teixeira Tarley State University of Londrina - UEL https://orcid.org/0000-0002-8685-1556

DOI:

https://doi.org/10.5433/1679-0375.2023.v44.47941

Keywords:

linseed, functional food, voltammetry, sample preparation

Abstract

The performance of three conventional treatments, including microwave-assisted acid digestion (MWAD), ultrasoundassisted extraction (UAE) and dry method (DAM) for determination of Cu²⁺ and Zn²⁺ in flaxseed meal, was evaluated. Quantification was performed by flame atomic absorption spectrometry (FAAS) and differential pulse anode stripping voltammetry (DPASV). TheMWAD treatment was performed with both concentrated HNO₃ (CA) and diluted acid (DA). The concentration of Cu²⁺ was determined by FAAS and DPASV, by different treatments, ranging from 14.4-26.0 μg g⁻¹and 8.5-17.9 μg g⁻¹, respectively. The concentration of Zn²⁺ was possible only by FAAS (28.7-77.4 μg g⁻¹). The highest concentrations were obtained using MWAD. The DAM showed values similar to MWAD for Cu²⁺, however, for Zn²⁺ it showed the lowest concentrations. UAE, in turn, showed low concentrations of Zn²⁺ in relation to MWAD, but similar results to MWAD-DA for Cu²⁺ in a sample with low fat content. Therefore, both the choice of treatment and the quantification technique play a crucial role in metal determination.

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Author Biographies

Fabio Antonio Cajamarca Suquila, National Pedagogic University - UPN

Dr. Prof, Dept. of Chemistry, UPN, Bogotá, Colombia

Leticia Alana Bertoldo, State University of Londrina - UEL

PhD Student, Dept. of Chemistry, UEL, Londrina, PR, Brazil

Luana Rianne da Rocha, State University of Londrina - UEL

PhD Student, Dept. of Chemistry, UEL, Londrina, PR, Brazil

Alexandra Beal, Federal Technological University of Paraná - UFTPR

Postdoctoral researcher UTFPR, Londrina, PR, Brazil

Milena do Prado Ferreira, State University of Londrina - UEL

PhD student, Dept. of Chemistry, UEL, Londrina, PR, Brazil

Renan Mendes Ruiz, State University of Londrina - UEL

PhD student, Dept. of Chemistry, UEL, Londrina, PR, Brazil

Tainara Capelari, State University of Londrina - UEL

PhD student, Dept. of Chemistry, UEL, Londrina, PR, Brazil

César Ricardo Teixeira Tarley, State University of Londrina - UEL

Dr. Prof., Dept. of Chemistry, UEL, Londrina, PR, Brazil

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