Biosynthetic Gold Nanoparticles as Sensitive and Selective Colorimetric Method for Mercury Ions

Maryam ABDULGHAFOR AHMED, Safana AHMED FARHAN, Rasha MONİEM DADOOSH, Abdulkadir MOHAMMED NOORİ JASSİM
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Abstract

Gold nanoparticles (AuNPs) are widely studied materials that have intense applications in various fields. Different methods use to synthesize the AuNPs, one of them is eco-friendly biological method, known as "green synthesis" a simple and inexpensive method. The Synthesis of AuNPs, using ginger extract is described here. The components found in ginger work as a stabilizing and reducing agent. Hydrogen tetrachloroaurate (HAuCl4) are mixed with the ginger extract to produce AuNPs. The Surface Plasmon Resonance (SPR) measured at λmax = 540 nm. UV-Vis, FTIR and Zeta potential are used to identify AuNPs, as well as AFM and SEM. Data indicate that AuNPs has a spherical structure. The results demonstrate that AuNPs stabilized by ascorbic acid were used as a colorimetric probe for Hg2+ ions, based on the production of (Au-Hg) amalgamate which made changes in their absorbance, due to its ability to reduce Hg2+ to Hg0, to enhance amalgamation. Practically, this procedure has successfully worked to detect Hg2+ in tap water as a sensitive and selective probe with upper limit of detection equal to 120 µM as well as the limit of detection (LOD) equal to 0.65 µM, so the method proved to be sensitive and selective probe.
生物合成金纳米颗粒对汞离子的灵敏选择性比色法
金纳米颗粒是一种被广泛研究的材料,在各个领域都有广泛的应用。合成aunp的方法不同,其中一种是生态友好的生物方法,被称为“绿色合成”,是一种简单而廉价的方法。本文介绍了用生姜提取物合成AuNPs的方法。生姜中的成分是一种稳定剂和还原剂。四氯酸氢(HAuCl4)与姜提取物混合生成aunp。在λmax = 540 nm处测量的表面等离子体共振(SPR)。利用UV-Vis, FTIR和Zeta电位以及AFM和SEM对AuNPs进行鉴定。数据表明,AuNPs具有球形结构。结果表明,抗坏血酸稳定的AuNPs作为Hg2+离子的比色探针,基于(Au-Hg)汞齐的产生,由于其能够将Hg2+还原为Hg0,从而增强汞齐,从而改变了它们的吸光度。在实际应用中,该方法成功地检测了自来水中的Hg2+,检测上限为120µM,检测限(LOD)为0.65µM,是一种灵敏的选择性探针。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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