Detecting trace of mercury ions in water using photoacoustic method enhanced by gold nanospheres

Qiaozhi He; Qian Zhang; W. Cao; Ting Yin; S. Zhao; Xiaoqia Yin; Hui Zhao; Wei Tao

doi:10.1016/j.microc.2019.104058

Detecting trace of mercury ions in water using photoacoustic method enhanced by gold nanospheres

Qiaozhi He
, Qian Zhang
, W. Cao
, Ting Yin
, S. Zhao
, Xiaoqia Yin
, Hui Zhao
, Wei Tao

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

A gold nanospheres (Au NSs)-enhanced photoacoustic (PA) system has been developed to detect parts per trillion (ppt)-level mercury ion (Hg²⁺) in aqueous environments, which combines the advantages of the high sensitivity of PA detection and high extinction coefficient of Au NSs. 4-mercaptophenylboronic acid (MPBA) is used as the aggregation agent to detect Hg²⁺ by a designed PA system. Experimental results demonstrate a linear relationship between the amplitude of PA signals and logarithmic concentration of Hg²⁺ in the range of 10 pM-1 μM (R=0.994). The detection limit of this Au NSs-enhanced PA system is 78 pM (16 ppt, S/N=3) with a quick response time of 1 min. This method has excellent selectivity for Hg²⁺ over other heavy metal ions, alkali, and alkaline earth metal ions. The system is cost-effective and shows a great potential for quick detection of Hg²⁺ trace in water with very high sensitivity.

Original language	English (US)
Article number	104058
Journal	Microchemical Journal
Volume	150
DOIs	https://doi.org/10.1016/j.microc.2019.104058
State	Published - Nov 2019

All Science Journal Classification (ASJC) codes

Analytical Chemistry
Spectroscopy

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10.1016/j.microc.2019.104058

Cite this

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title = "Detecting trace of mercury ions in water using photoacoustic method enhanced by gold nanospheres",

abstract = "A gold nanospheres (Au NSs)-enhanced photoacoustic (PA) system has been developed to detect parts per trillion (ppt)-level mercury ion (Hg2+) in aqueous environments, which combines the advantages of the high sensitivity of PA detection and high extinction coefficient of Au NSs. 4-mercaptophenylboronic acid (MPBA) is used as the aggregation agent to detect Hg2+ by a designed PA system. Experimental results demonstrate a linear relationship between the amplitude of PA signals and logarithmic concentration of Hg2+ in the range of 10 pM-1 μM (R=0.994). The detection limit of this Au NSs-enhanced PA system is 78 pM (16 ppt, S/N=3) with a quick response time of 1 min. This method has excellent selectivity for Hg2+ over other heavy metal ions, alkali, and alkaline earth metal ions. The system is cost-effective and shows a great potential for quick detection of Hg2+ trace in water with very high sensitivity.",

author = "Qiaozhi He and Qian Zhang and W. Cao and Ting Yin and S. Zhao and Xiaoqia Yin and Hui Zhao and Wei Tao",

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T1 - Detecting trace of mercury ions in water using photoacoustic method enhanced by gold nanospheres

AU - He, Qiaozhi

AU - Zhang, Qian

AU - Cao, W.

AU - Yin, Ting

AU - Zhao, S.

AU - Yin, Xiaoqia

AU - Zhao, Hui

AU - Tao, Wei

PY - 2019/11

Y1 - 2019/11

N2 - A gold nanospheres (Au NSs)-enhanced photoacoustic (PA) system has been developed to detect parts per trillion (ppt)-level mercury ion (Hg2+) in aqueous environments, which combines the advantages of the high sensitivity of PA detection and high extinction coefficient of Au NSs. 4-mercaptophenylboronic acid (MPBA) is used as the aggregation agent to detect Hg2+ by a designed PA system. Experimental results demonstrate a linear relationship between the amplitude of PA signals and logarithmic concentration of Hg2+ in the range of 10 pM-1 μM (R=0.994). The detection limit of this Au NSs-enhanced PA system is 78 pM (16 ppt, S/N=3) with a quick response time of 1 min. This method has excellent selectivity for Hg2+ over other heavy metal ions, alkali, and alkaline earth metal ions. The system is cost-effective and shows a great potential for quick detection of Hg2+ trace in water with very high sensitivity.

AB - A gold nanospheres (Au NSs)-enhanced photoacoustic (PA) system has been developed to detect parts per trillion (ppt)-level mercury ion (Hg2+) in aqueous environments, which combines the advantages of the high sensitivity of PA detection and high extinction coefficient of Au NSs. 4-mercaptophenylboronic acid (MPBA) is used as the aggregation agent to detect Hg2+ by a designed PA system. Experimental results demonstrate a linear relationship between the amplitude of PA signals and logarithmic concentration of Hg2+ in the range of 10 pM-1 μM (R=0.994). The detection limit of this Au NSs-enhanced PA system is 78 pM (16 ppt, S/N=3) with a quick response time of 1 min. This method has excellent selectivity for Hg2+ over other heavy metal ions, alkali, and alkaline earth metal ions. The system is cost-effective and shows a great potential for quick detection of Hg2+ trace in water with very high sensitivity.

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JO - Microchemical Journal

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Detecting trace of mercury ions in water using photoacoustic method enhanced by gold nanospheres

Abstract

All Science Journal Classification (ASJC) codes

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