Jump to main content
Jump to site search

Issue 7, 2017
Previous Article Next Article

Determination of mercury(II) in water at sub-nanomolar levels by laser ablation-ICPMS analysis of screen printed electrodes used as a portable voltammetric preconcentration system

Author affiliations

Abstract

Environmental pollution by mercury in ambient water samples is a recognized problem worldwide. Sample preservation and transport to the laboratory lead to uncertain analytical results. This study outlines the development of a procedure for on-site electrodeposition of mercury from water samples on a screen-printed gold electrode (SPGE) using portable voltammetric techniques. Once in the laboratory, Hg is analyzed by laser ablation inductively coupled plasma-mass spectrometry (LA-ICPMS) in order to ensure that the required sensitivity and precision levels for environmental sample analysis are reached. A new ablation chamber was intentionally designed for the analysis of SPGE's gold electrode. This cell has a small internal volume of 15 cm3 and the SPGE device perfectly fits inside. This design assures signal stability, avoids elemental fractionation and reduces wash-out time to a few seconds, reducing the analysis time considerably. The proposed method is capable of measuring dissolved mercury at the ng L−1 level (quantification limit 200 ng L−1) with good precision (RSD < 7.6%). The proposed method was tested with the NCS ZC 76303 (NIM-GBW08603) Mercury in water Certified Reference Material.

Graphical abstract: Determination of mercury(ii) in water at sub-nanomolar levels by laser ablation-ICPMS analysis of screen printed electrodes used as a portable voltammetric preconcentration system

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 09 Jan 2017, accepted on 22 Feb 2017 and first published on 27 Feb 2017


Article type: Paper
DOI: 10.1039/C7AN00049A
Citation: Analyst, 2017,142, 1157-1164
  •   Request permissions

    Determination of mercury(II) in water at sub-nanomolar levels by laser ablation-ICPMS analysis of screen printed electrodes used as a portable voltammetric preconcentration system

    Z. Abrego, N. Unceta, A. Sánchez, A. Gómez-Caballero, L. M. Berrio-Ochoa, M. Aranzazu Goicolea and R. J. Barrio, Analyst, 2017, 142, 1157
    DOI: 10.1039/C7AN00049A

Search articles by author