NDLI: 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

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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

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The Analyst Vol - 142 Issue - 6

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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

Content Provider	Royal Society of Chemistry (RSC)
Author	Sánchez, Alicia Goicolea, M. Aranzazu Unceta, Nora Abrego, Zuriñe Barrio, Ramón J. Gómez-Caballero, Alberto Berrio-Ochoa, Luis Maria
Copyright Year	2017
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.
Starting Page	1157
Ending Page	1164
Page Count	8
File Format	HTM / HTML PDF
ISSN	00032654
Volume Number	142
Issue Number	7
Journal	The Analyst
DOI	10.1039/c7an00049a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Electrode Project Mercury Laser ablation Mercury poisoning Electroplating Ablation NCS
Content Type	Text
Resource Type	Article
Subject	Spectroscopy Environmental Chemistry Analytical Chemistry Biochemistry Electrochemistry

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