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.
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收藏
页码：37 / 41
页数：5
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