Determination of toxic elements in yerba mate by ICP-MS after diluted acid digestion under O2 pressure

被引：26

作者：

Pardinho, Renan B. ^{[1
]}

Dalla Vecchia, Paula ^{[1
]}

Mendes, Ana L. G. ^{[1
]}

Bizzi, Cezar A. ^{[1
]}

Mello, Paola A. ^{[1
]}

Duarte, Fabio A. ^{[1
]}

Flores, Erico M. M. ^{[1
]}

机构：

[1] Univ Fed Santa Maria, Dept Quim, BR-97105900 Santa Maria, RS, Brazil

来源：

FOOD CHEMISTRY | 2018年 / 263卷

关键词：

Wet digestion; Diluted nitric acid; Yerba mate; Oxygen pressure digestion; Toxic elements; ICP-MS; Ilex paraguariensis analysis; PLASMA-MASS SPECTROMETRY; OPTICAL-EMISSION SPECTROMETRY; ILEX-PARAGUARIENSIS; NITRIC-ACID; CONCOMITANT ELEMENTS; TRACE-ELEMENTS; IONS; OES;

D O I：

10.1016/j.foodchem.2018.04.112

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

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 O-2. 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.

引用

页码：37 / 41

页数：5

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