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1,428 Newest Publications about the topic mercury

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Speciation of mercury in various samples from the micro-ecosystem of East Lake by hollow fiber-liquid–liquid–liquid microextraction-HPLC-ICP-MS

18-11-2014 | Beibei Chen; Yunli Wu; Xueqin Guo; Man He; Bin Hu, Journal of Analytical Atomic Spectrometry, 2014

A novel method by combining hollow fiber-liquid–liquid–liquid microextraction (HF-LLLME) with HPLC-ICP-MS was developed for the speciation of inorganic mercury (Hg2+) and organomercury including methylmercury (MeHg+), ethylmercury (EtHg+) and phenylmercury (PhHg+), in the micro-ecosystem of East ...

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X-ray Structure of a Hg2+ Complex of Mercuric Reductase (MerA) and Quantum Mechanical/Molecular Mechanical Study of Hg2+ Transfer between the C-Terminal and Buried Catalytic Site Cysteine Pairs

13-11-2014 | Peng Lian; Hao-Bo Guo; Demian Riccardi; Aiping Dong; Jerry M. Parks; Qin Xu; Emil F. Pai; Susan M. Miller; Dong-Qing ..., Biochemistry, 2014

Mercuric reductase, MerA, is a key enzyme in bacterial mercury resistance. This homodimeric enzyme captures and reduces toxic Hg2+ to Hg0, which is relatively unreactive and can exit the cell passively. Prior to reduction, the Hg2+ is transferred from a pair of cysteines (C558′ and C559′ using ...

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Isotopic composition analysis of dissolved mercury in seawater with purge and trap preconcentration and a modified Hg introduction device for MC-ICP-MS

12-11-2014 | Haiying Lin; Dongxing Yuan; Bingyan Lu; Shuyuan Huang; Lumin Sun; Fan Zhang; Yaqin Gao, Journal of Analytical Atomic Spectrometry, 2014

This study aimed to solve the common problems in Hg isotope analysis of water samples at low concentration. The isotope composition of dissolved Hg in seawater is reported for the first time. A modified device for introducing Hg into a multi-collector inductively coupled plasma mass spectrometer ...

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Mercury Re-Emission in Flue Gas Multipollutants Simultaneous Absorption System

11-11-2014 | Yue Liu; Qingfeng Wang; Rongjun Mei; Haiqiang Wang; Xiaole Weng; Zhongbiao Wu, Environmental Science & Technology, 2014

Recently, simultaneous removal of SO2, NOx and oxidized mercury in wet flue gas desulfurization (WFGD) scrubber has become a research focus. Mercury re-emission in traditional WFGD system has been widely reported due to the reduction of oxidized mercury by sulfite ions. However, in ...

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Rapid, Selective, and Ultrasensitive Fluorimetric Analysis of Mercury and Copper Levels in Blood Using Bimetallic Gold–Silver Nanoclusters with “Silver Effect”-Enhanced Red Fluorescence

10-11-2014 | Ning Zhang; Yanmei Si; Zongzhao Sun; Lijun Chen; Rui Li; Yuchun Qiao; Hua Wang, Analytical Chemistry, 2014

Bimetallic alloying gold–silver nanoclusters (Au-AgNCs) have been synthesized by a one-pot biomineralization synthesis route at a vital molar ratio of Au/Ag precursors in the protein matrix. Unexpectedly, the prepared Au-AgNCs could exhibit dramatically enhanced red fluorescence, which is about ...

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A sensitive assay of mercury using fluorescence correlation spectroscopy of gold nanoparticles

07-11-2014 | Zhancheng Xu, Tao Lan, Xiangyi Huang, Chaoqing Dong, Jicun Ren, Luminescence, 2014

ABSTRACT We described a new and sensitive method for the determination of mercury ions (Hg2+) on the basis of fluorescence correlation spectroscopy (FCS) and recognition of oligonucleotides. In this assay, 30‐nm gold nanoparticles (GNPs) were modified with oligonucleotides containing thymine ...

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Behavior of Mercury Emissions from a Commercial Coal-Fired Power Plant: The Relationship between Stack Speciation and Near-Field Plume Measurements

07-11-2014 | Matthew S. Landis; Jeffrey V. Ryan; Arnout F. H. ter Schure; Dennis Laudal, Environmental Science & Technology, 2014

The reduction of divalent gaseous mercury (HgII) to elemental gaseous mercury (Hg0) in a commercial coal-fired power plant (CFPP) exhaust plume was investigated by simultaneous measurement in-stack and in-plume as part of a collaborative study among the U.S. EPA, EPRI, EERC, and Southern Company. ...

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Synthesis and Kinetics of Sterically Altered Photochromic Dithizonatomercury Complexes

07-11-2014 | Ernestine Alabaraoye; Karel G. von Eschwege; Nagarajan Loganathan, Journal of Physical Chemistry A, 2014

Following a previous study where 12 electronically altered dithizones were synthesized, here we report on attempts to synthesize 26 dithizones. The purpose was to explore the boundaries within which dithizones may be synthesized, explore spectral tuning possibilities, and investigate steric ...

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Automated Determination of Cu(II), Pb(II), Cd(II) and Zn(II) in Environmental Samples by Square Wave Voltammetry Exploiting Sequential Injection Analysis and Screen Printed Electrodes

06-11-2014 | Luiz Fernando Ribeiro, Jorge Cesar Masini, Electroanalysis, 2014

Abstract This paper describes the development of a methodology for quantification of Cu(II), Pb(II), Cd(II) and Zn(II) in waters and sediments by anodic stripping voltammetry (ASV) automated by Sequential Injection Analysis (SIA) using a graphite screen printed sensor modified with mercury. ...

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A Simple and Highly Sensitive Electrochemically Reduced p‐Nitrobenzoic Acid Film Modified Sensor for Determination of Mercury

06-11-2014 | A. Daniel Arulraj, M. Vijayan, J. Samseya, V. S. Vasantha, Electroanalysis, 2014

Abstract Herein, a simple electrochemical sensor was fabricated for sensing Hg2+ ions by using electrochemically reduced p‐nitrobenzoic acid molecules modified (ERpNBA) glassy carbon electrode (GCE). The modified electrode was applied for the determination of Hg2+ ions by using differential ...

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