High‐Throughput Mercury Monitoring in Indoor Dust Microsamples by Bath Ultrasonic Extraction and Anodic Stripping Voltammetry on Gold Nanoparticles‐Modified Screen‐Printed Electrodes

Abstract

A simple strategy based on the combination of a high‐throughput bath ultrasonic extraction with portable electrochemical determination was developed for fast Hg(II) monitoring in dust samples, with potential applicability to decentralized atmospheric pollution assessment. Square‐wave anodic stripping voltammetry (SWASV) on gold nanoparticles‐modified screen‐printed carbon electrodes (AuNPs‐SPCEs) coupled to the extraction procedure resulted in a convenient method for sensitive, reliable, and reproducible mercury detection. The proposed combination of techniques was evaluated with good agreement by using NIST Standard Reference Material 2583 Trace Elements in Indoor Dust. The method was successfully applied for Hg monitoring in complex and heterogeneous indoor dust samples collected at different indoor ambients. ICP‐MS was used to contrast the voltammetric measurements.

Characterization and Evaluation of Heavy Metal Pollution in Soil-Wheat System Around Coal Mines in Pingdingshan, China

“…The Zn content ranges between 50.7 and 125.1 mg•kg -1 , while the Pb content ranges between 15.5 and 38.2 mg•kg -1 . 2 The standard value of soil environmental quality originates from the secondary standard of soil environmental quality standard (GB15618-2008), a is soil pH < 5.50, b is pH between 5.50 and 6.50, c is soil pH between 6.50 and 7.50, and d is the corresponding quality standard when soil pH > 7.50…”

“…DTPA can extract watersoluble, exchangeable, adsorptive, organic stationary and partially-oxidized heavy metals from soil, which is considered to be a highly bioactive form related to its total amount. The available heavy metals measured by DGT include the free state of soil solution and the unstable organic and inorganic complex state released from the surface of soil particles (Chen et al, 2012; Bernalte et al, 2013). The average extraction rates (i.e.…”

Voltammetric determination of metal ions beyond mercury electrodes. A review

“…The use of AuNPs instead of the classical gold electrode improves the sensitivity in the analysis of Hg(II) [81][82][83][84][85][86]] (Table 4). A rigorous comparison of SPCE modified with nanomaterials or with hybrid nanomaterials shows the advantages that can provide the combination of different nanomaterials in one device [86].…”

Stripping Voltammetric Determination of Mercury in Fish Oil Capsules Using a Screen‐printed Gold Electrode

“…Recent works have shown the good performance of SPGE for Hg determinations in different samples . However, the use of these electrodes is limited due to the overpotential of hydrogen compared to other electrodes such as mercury or bismuth film.…”