Arsenic (As^III), a notorious environmental hazard poses threat to the lives of several hundred million people. Notwithstanding radical developments of As^III detection in water, a fast, simple and sensitive electrochemical process with lower detection limit for the quantification of As^III in saliva and urine samples has scarcely ever been tried. Here, we have detected the poisoning due to As^III in the saliva and urine samples of tobacco-chewers/smokers using a novel one-pot synthesized MnO₂/polyoxytyramine/rGO nanocomposite. The composite was characterized by various analytical techniques such as UV–Vis. and FT-IR spectroscopic analyses, XRD, SEM, TEM, EDAX and elemental mapping analyses. The proposed As^III quantification system has a wide linearity range (0.01–0.900 ppb) and the lowest detection limit (42 parts per trillion).

中文翻译：

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临床相关的锰氧化物/聚氧酪胺/还原氧化石墨烯纳米复合材料用于唾液和尿中伏安法的伏安检测

砷（As ^III）是一种臭名昭著的环境危害，威胁着数百万人的生命。尽管水中As ^III的检测已经取得了长足的发展，但几乎没有尝试过一种快速，简单而灵敏的电化学方法，该方法具有较低的检出限，用于定量唾液和尿液中的As ^III。在这里，我们已经使用新型的一锅合成MnO ₂ /聚氧酪胺/ rGO纳米复合材料在烟草咀嚼者/吸烟者的唾液和尿液样品中检测到由于As ^III引起的中毒。该复合材料的特征在于多种分析技术，例如UV-Vis。和FT-IR光谱分析，XRD，SEM，TEM，EDAX和元素图分析。建议的^III定量系统具有宽线性范围（0.01–0.900 ppb）和最低检测限（42万亿分之一）。