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首页> 外文期刊>Sensing and Bio-Sensing Research >Electrochemical detection of lead and cadmium in UHT-processed milk using bismuth nanoparticles/Nafion?-modified pencil graphite electrode
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Electrochemical detection of lead and cadmium in UHT-processed milk using bismuth nanoparticles/Nafion?-modified pencil graphite electrode

机译：铋纳米粒子/ Nafion？修饰铅笔石墨电极电化学检测超高温处理牛奶中的铅和镉

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Pencil graphite electrodes (PGEs) were modified with bismuth nanoparticles and Nafion? using the drop-coating method. Simultaneous detection of trace cadmium (Cdsup2+/sup) and lead (Pbsup2+/sup) in ultrahigh-temperature-processed milk samples were done via anodic stripping voltammetry using the modified PGE as the working electrode. Scanning electron microscopy and energy-dispersive x-ray analyses were conducted for the morphological characterization of the modified PGE. The limit of detection was found to be 7.31?μg/L for Cdsup2+/sup and 31.07?μg/L for Pbsup2+./sup Trace quantities of Cdsup2+/sup and Pbsup2+/sup in the milk samples were detected. Results showed that all milk samples have tolerable daily intake less than the World Health Organization's permissible daily consumption of trace heavy metals of 0.83?μg/kgsubbw/sub based on the average adult body weight (60?kg) and estimated volume of daily milk consumption (0?.5?L).
机译：笔形石墨电极（PGE）用铋纳米粒子和Nafion？改性。使用滴涂法。采用阳极溶出伏安法，通过阳极溶出伏安法同时测定了超高温处理牛奶样品中的痕量镉（Cd 2 + ）和铅（Pb 2 + ）。工作电极。进行了扫描电子显微镜和能量色散X射线分析，以对改性PGE进行形态表征。 Cd 2 + 的检出限为7.31？μg/ L，Pb 2+的检出限为31.07？g / L。痕量Cd 2在牛奶样品中检测到+ 和Pb 2 + 。结果显示，所有牛奶样品的每日容许摄入量均少于世界卫生组织基于成人平均体重（60？kg）和体重允许的每日摄入的痕量重金属0.83？μg/ kg bw 。估计每天的牛奶消耗量（0？.5？L）。

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