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首页> 外文期刊>Analytica chimica acta >Exploring the applicability of nano-selenium for capture of mercury vapor: Paper based sorbent and a chemical modifier in graphite furnace atomic absorption spectrometry
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Exploring the applicability of nano-selenium for capture of mercury vapor: Paper based sorbent and a chemical modifier in graphite furnace atomic absorption spectrometry

机译：探讨纳米硒捕获汞蒸汽的适用性：纸炉炉原子吸收光谱法中的吸附剂和化学改性剂

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The ability of the selenium nanoparticles (SeNPs) to capture mercury (Hg) is a subject of interest as this concept can be applied to reduce mercury poisoning cases to certain extent. In this work, SeNPs were fabricated on a paper and used as sorbent for capturing mercury vapor. The formation of the stable HgSe on the paper sorbent after the sequestration was visible to the naked eye for mercury concentration of higher than 200 mu g L-1, corresponding with the discoloration of the paper sorbent from dark orange to gray color. The gray color was more intense with increasing Hg concentrations from 200 to 300, 500, and 1000 mu g L-1. Therefore, color analysis software was used as a semi-quantitative technique for mercury analysis. The mercury captured was also analyzed with the inductively coupled plasma mass spectrometry (ICP-MS). After confirming that SeNPs helps capture mercury, it was further applied as a chemical modifier in graphite furnace atomic absorption spectrometry (GFAAS) for mercury determination. The SeNPs (410 mg L-1) allowed the use of pyrolysis temperature up to 300 degrees C with adequate sensitivity. Calibration curve was constructed from 100 to 500 mu g C-1 with good linearity (R-2 = 0.9968). With the use of SeNPs, 15 times sensitivity improvement was obtained compared to that without the use of any chemical modifier. The detection limit (N = 10 at 3 sigma) was calculated at 2 mu g L-1 for the Hg standard. The proposed modifier was used for analyzing mercury in the saliva sample. Apart from minimizing extensive sample pretreatment process, the recovery percentage of Hg from the spiked sample was found to be approximately 90% (RSD 0-2%) with the help of the SeNPs modifier. This work exhibits multi-dimensional applications of SeNPs towards mercury analysis. (C) 2019 Elsevier B.V. All rights reserved.
机译：硒纳米粒子（SENP）捕获汞（HG）的能力是一个兴趣的主题，因为这种概念可以应用于在一定程度上减少汞中毒病例。在这项工作中，塞普斯在纸上制造并用作吸附剂，用于捕获汞蒸汽。在封存后的纸吸附剂上形成稳定的Hgse，肉眼可见，用于汞浓度高于200μg-1，与纸吸附剂的变色从深橙色到灰色。灰色颜色与200至300,500,500和1000μmG1-1的增加浓度增加更强烈。因此，颜色分析软件被用作汞分析的半定量技术。捕获的汞也用电气耦合等离子体质谱（ICP-MS）分析。在确认森塞有助于捕获汞后，它进一步应用于石墨炉原子吸收光谱法（GFAAS）中的化学改性剂，用于汞测定。森塞（410mg L-1）允许使用高达300摄氏度的热解温度充分灵敏度。校准曲线由100至500μgC-1构成，线性良好（R-2 = 0.9968）。通过使用SENP，与不使用任何化学改性剂相比，获得了15次敏感性改进。在2μgL-1上以2μg标准计算检测限（3Σ）计算。所提出的改性剂用于分析唾液样品中的汞。除了最大限度地减少广泛的样品预处理过程之外，借助于SENPS改性剂，发现来自尖刺样品的Hg的回收率约为90％（RSD 0-2％）。这项工作展示了森塞的多维应用朝着汞分析。 （c）2019年Elsevier B.V.保留所有权利。

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