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首页> 外文期刊>Quimica nova >Determination of As, Cd and Pb in babassu nut and mesocarp, sapucaia, xixa and brazilian nut by atomic absorption spectrometry
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Determination of As, Cd and Pb in babassu nut and mesocarp, sapucaia, xixa and brazilian nut by atomic absorption spectrometry

机译：原子吸收光谱法测定巴西坚果和中果皮，乌贼，希沙和巴西坚果中的砷，镉和铅。

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This work describes methods for the simultaneous determination of Cd and Pb by graphite furnace atomic absorption spectrometry and As by hydride generation atomic absorption spectrometry in Brazilian nuts. The samples (~ 0.300 g) were digested to clear solutions in a closed vessel microwave oven. The pyrolysis and atomization temperatures for simultaneous determinations of Cd and Pb were 1100 and 2100 °C, respectively, using 0.5% (w v-1) NH4H2PO4 + 0.03% (w v-1) Mg(NO3)2 as chemical modifier. The limits of detection (3Δ) were 3.8 μg kg-1 for As, 0.86 μg kg-1 for Cd and 13 μg kg-1 for Pb. The reliability of the entire procedures was confirmed by peach leaves (No. 1547 - NIST) certified reference material analysis and addition and recovery tests. The found concentrations presented no statistical differences at the 95% confidence level.
机译：这项工作描述了通过石墨炉原子吸收光谱法和氢化物发生原子吸收光谱法同时测定巴西坚果中Cd和Pb的方法。将样品（约0.300 g）在密闭容器的微波炉中蒸煮以澄清溶液。同时测定Cd和Pb的热解温度和雾化温度分别为1100和2100°C，使用0.5％（w v-1）NH4H2PO4 + 0.03％（w v-1）Mg（NO3）2作为化学改性剂。砷的检出限（3Δ）为3.8μgkg-1，镉为0.86μgkg-1，铅为13μgkg-1。桃叶（No. 1547-NIST）认证的参考材料分析以及添加和恢复测试证实了整个程序的可靠性。发现的浓度在95％置信水平下无统计学差异。

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