Firdaus M Lutfi, Fitriani Ikka, Wyantuti Santhy, Hartati Yeni W, Khaydarov Renat, McAlister Jason A, Obata Hajime, Gamo Toshitaka
Graduate School of Science Education, University of Bengkulu.
Department of Chemistry, University of Padjadjaran.
Anal Sci. 2017;33(7):831-837. doi: 10.2116/analsci.33.831.
Novel green-chemistry synthesis of silver nanoparticles (AgNPs) is introduced as a low-cost, rapid and easy-to-use analytical method for mercury ion detection. Aqueous fruit extract of water apple (Syzygium aqueum) was used for the first time as bioreductant to synthesize stable AgNPs. The prepared AgNPs have a yellowish-brown color with a surface plasmon resonance peak at 420 nm. The addition of Hg(II) ions then changes the AgNPs color to colorless. The color change was in proportion to the concentration of Hg(II) ions. The presence of other metal ions in the system was also evaluated. The proposed method shows good selectivity and sensitivity towards Hg(II) ions. Using UV-visible spectrophotometry, the detection limit of the developed method was 8.5 × 10 M. The proposed method has been successfully applied for determination of Hg(II) ions in tap and lake water samples with precision better than 5%.
新型绿色化学合成银纳米颗粒（AgNPs）被引入作为一种低成本、快速且易于使用的汞离子检测分析方法。首次使用水蒲桃（水莲雾，Syzygium aqueum）的水性果实提取物作为生物还原剂来合成稳定的AgNPs。制备的AgNPs呈黄褐色，在420nm处有表面等离子体共振峰。加入Hg(II)离子后，AgNPs的颜色变为无色。颜色变化与Hg(II)离子的浓度成正比。还评估了体系中其他金属离子的存在情况。所提出的方法对Hg(II)离子具有良好的选择性和灵敏度。使用紫外可见分光光度法，所开发方法的检测限为8.5×10 M。所提出的方法已成功应用于自来水和湖水样品中Hg(II)离子的测定，精密度优于5%。
