Mercury(编程语言)
检出限
化学
吸光度
银纳米粒子
离子
氯化物
分析化学(期刊)
校准曲线
纳米颗粒
色谱法
材料科学
纳米技术
有机化学
计算机科学
程序设计语言
作者
Kannan Badri Narayanan,Sung Soo Han
标识
DOI:10.1016/j.carbpol.2016.12.055
摘要
The natural algal polysaccharide carrageenan was used for the greener synthesis of silver/silver chloride nanoparticles (Carr–Ag/AgCl NPs) without any toxic chemicals. We report the robust, highly selective, and sensitive colorimetric sensing of Hg2+ ions using Carr–Ag/AgCl NPs without any further surface modification. The dark-brown color of a solution of Carr–Ag/AgCl NPs turned to white in a concentration-dependent manner with the addition of Hg2+ ions, confirming the interaction of Carr–Ag/AgCl NPs with Hg2+ ions. The plot of the extinction ratio of absorbance at 350 nm to 450 nm (A350/A450) for Carr–Ag/AgCl NPs against the concentration of [Hg2+] ions was linear, and the calibration curve was A350/A450 = 1.05254 + 0.00318 × CHg with a lower detection limit of 1 μM. This portable and cost-effective method for mercury(II) ion sensing is widely applicable in on-field qualitative and quantitative measurements of [Hg2+] ions in environmental or biological samples.
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