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

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