Speciation of arsenic in different types of nuts by ion chromatography-inductively coupled plasma mass spectrometry
Speciation of arsenic in different types of nuts by ion chromatography-inductively coupled plasma mass spectrometry
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DOI：
10.1021/jf035180l
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发表时间：
2004-03-24
影响因子：
6.1
通讯作者：
Caruso, JA
中科院分区：
文献类型：
--
作者：
Kannamkumarath, SS;Wróbel, K;Caruso, JA
在这项工作中，砷的定量测定和分析形态进行了不同类型的坚果，随机购买当地市场。整个坚果的硬度和高脂质含量使得这种材料的制备难以进行分析。样品均匀性的缺乏导致了不可重现的结果。为了提高分析的准确度，分别测定了坚果油和脱脂样品中的砷。用氯仿和甲醇（2：1）的混合物从研磨样品中提取脂质。将脱脂材料干燥并再次研磨，得到细粉。通过合并两种有机提取物并通过蒸发溶剂获得坚果油。采用微波消解法对两种坚果样品进行消解，电感耦合等离子体质谱法（ICP-MS）测定总砷。从不同类型的坚果油中获得的结果显示，元素浓度范围为2.9-16.9 ng g（-1）。含砷量较低的是在含硫物质中（
In this work the quantitative determination and analytical speciation of arsenic were undertaken in different types of nuts, randomly purchased from local markets. The hardness of the whole nuts and high lipid content made the preparation of this material difficult for analysis. The lack of sample homogeneity caused irreproducible results. To improve the precision of analysis, arsenic was determined separately in nut oil and in the defatted sample. The lipids were extracted from the ground sample with the two portions of a mixture of chloroform and methanol (2:1). The defatted material was dried and ground again, yielding a fine powder. The nut oil was obtained by combining the two organic extracts and by evaporating the solvents. The two nut fractions were microwave digested, and total arsenic was determined by inductively coupled plasma mass spectrometry (ICP-MS). The results obtained for oils from different types of nuts showed element concentration in the range 2.9-16.9 ng g(-1). Lower levels of arsenic were found in clefatted material (