| Literature DB >> 29784325 |
Renan B Pardinho1, Paula Dalla Vecchia1, Ana L G Mendes1, Cezar A Bizzi1, Paola A Mello1, Fabio A Duarte1, Erico M M Flores2.
Abstract
In this work, a procedure allowing effective digestion of a high mass of yerba mate (up to 1500 mg) using diluted HNO3, in a system pressurized with oxygen, is proposed. Digests were suitable for direct analysis by ICP-MS, virtually free of interferences. Digestion was performed using 7 mol l-1 HNO3 and 8 bar O2. The digestion efficiency was better than 92% and digests presented a relatively low acidity (<10 mmol HNO3). The limit of quantification was 4.0, 1.0 and 1.0 ng g-1 for As, Cd and Pb, respectively. Under optimized conditions up to 1500 mg of sample were digested and no interferences were observed during analyses by ICP-MS, making this approach suitable for routine determination of As, Cd and Pb in yerba mate and also in agreement with the quality control requirements.Entities:
Keywords: Diluted nitric acid; ICP-MS; Ilex paraguariensis analysis; Oxygen pressure digestion; Toxic elements; Wet digestion; Yerba mate
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Year: 2018 PMID： 29784325 DOI： 10.1016/j.foodchem.2018.04.112
Source DB: PubMed Journal: Food Chem ISSN： 0308-8146 Impact factor: 7.514