Determination of Arsenic, Mercury and Barium in herbarium mount paper using dynamic ultrasound-assisted extraction prior to atomic fluorescence and absorption spectrometry

Lummas, S. and Ruiz-Jimenez, J. and Luque de Castro, M. D. and Colston, Belinda and Gonzalez-Rodriguez, Jose and Chen, B. and Corns, W. (2011) Determination of Arsenic, Mercury and Barium in herbarium mount paper using dynamic ultrasound-assisted extraction prior to atomic fluorescence and absorption spectrometry. Analytical Letters, 44 (10). pp. 1842-1852. ISSN 0003-2719

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Determination of Arsenic, Mercury and Barium in herbarium mount paper using dynamic ultrasound-assisted extraction prior to atomic fluorescence and absorption spectrometries
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Full text URL: http://dx.doi.org/10.1080/00032719.2010.526265

Abstract

A dynamic ultrasound-assisted extraction method using Atomic Absorption and Atomic Flourescence spectrometers as detectors was developed to analyse mercury, arsenic and barium from herbarium mount paper originating from the herbarium collection of the National Museum of Wales. The variables influencing extraction were optimised by a multivariate approach. The optimal conditions were found to be 1% HNO3 extractant solution used at a flow rate of 1 mL min-1. The duty cycle and amplitude of the ultrasonic probe was found to be 50% in both cases with an ultrasound power of 400 W. The optimal distance between the probe and the top face of the extraction chamber was found to be 0 cm. Under these conditions the time required for complete extraction of the three analytes was 25 min. Cold vapour and hydride generation coupled to atomic fluorescence spectrometry was utilized to determine mercury and arsenic, respectively. The chemical and instrumental conditions were optimized to provide detection limits of 0.01ng g-1 and 1.25 ng g-1 for mercury and arsenic, respectively. Barium was determined by graphite-furnace atomic absorption spectrometry, with a detection limit of 25 ng g-1. By using 0.5 g of sample, the concentrations of the target analytes varied for the different types of paper and ranged between 0.4–2.55 µg g-1 for Ba, 0.035–10.47 µg g-1 for As and 0.0046–2.37 µg g-1 for Hg.

Item Type:Article
Keywords:Arsenic, Atomic Spectroscopy, Barium, Mercury, Remediation, Ultrasound extraction
Subjects:F Physical Sciences > F200 Materials Science
F Physical Sciences > F140 Environmental Chemistry
F Physical Sciences > F110 Applied Chemistry
F Physical Sciences > F400 Forensic and Archaeological Science
F Physical Sciences > F100 Chemistry
F Physical Sciences > F180 Analytical Chemistry
Divisions:College of Science > School of Life Sciences
ID Code:4651
Deposited By: Jose Gonzalez-Rodriguez
Deposited On:30 Aug 2011 08:31
Last Modified:17 Jul 2014 11:01

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