文献类型：期刊文献

英文题名：A colorimetric silver nanoparticle-based assay for Hg(II) using lysine as a particle-linking reagent

作者：Li, Li[1];Gui, Lili[2];Li, Weiwei[1]

第一作者：李丽

通讯作者：Li, L[1]

机构：[1]Xinxiang Univ, Coll Chem & Chem Engn, Xinxiang 453003, Peoples R China;[2]Xinxiang Vocat & Tech Coll, Xinxiang 453000, Peoples R China

第一机构：新乡学院化学化工学院

通讯机构：[1]corresponding author), Xinxiang Univ, Coll Chem & Chem Engn, Xinxiang 453003, Peoples R China.|[110713]新乡学院化学化工学院;[11071]新乡学院;

年份：2015

卷号：182

期号：11-12

起止页码：1977-1981

外文期刊名：MICROCHIMICA ACTA

收录：;Scopus(收录号：2-s2.0-84938289586);WOS:【SCI-EXPANDED(收录号:WOS:000358673600014)】；

基金：All authors gratefully acknowledge the financial support of key scientific and technological project of Henan Province (122102210406)

语种：英文

外文关键词：Silver nanoparticles; Mercury ion; Colorimetry; Lysine

摘要：We describe a colorimetric method for the determination of Hg(II) that is based on the aggregation of silver nanoparticles (AgNPs) in the presence of Hg(II) and lysine. If Hg(II) ions are added to unmodified AgNPs, they will deposit on the surface where they will be reduced to Hg(0) by NaBH4 to form a shell around the AgNPs. Upon addition of lysine to the Hg(II)-capped AgNPs, the aggregation of the AgNPs will be induced because the two amino groups of lysine have a high affinity for Hg(II). Aggregation results in a color change from orange to yellowish. The effect was exploited to design a colorimetric assay for Hg(II) that has a 1 nM detection limit.