University of Surrey

Test tubes in the lab Research in the ATI Dance Research

Field based speciation of arsenic in UK and Argentinean water samples

Watts, MJ, O'Reilly, J, Marcilla, AL, Shaw, RA and Ward, NI (2010) Field based speciation of arsenic in UK and Argentinean water samples ENVIRON GEOCHEM HLTH, 32 (6). 479 - 490. ISSN 0269-4042

[img]
Preview
PDF
03_0309_EGAH_Watts_et_al_Field_As_speciation_Final.pdf - Accepted Version

Download (292kB)

Abstract

A field method is reported for the speciation of arsenic in water samples that is simple, rapid, safe to use beyond laboratory environments, and cost effective. The method utilises solid-phase extraction cartridges (SPE) in series for selective retention of arsenic species, followed by elution and measurement of eluted fractions by inductively coupled plasma mass spectrometry (ICP-MS) for "total" arsenic. The method is suitable for on-site separation and preservation of arsenic species from water. Mean percentage accuracies (n = 25) for synthetic solutions of arsenite (As-III), arsenate (As-V), monomethylarsonic acid (MA), and dimethylarsinic acid (DMA) containing 10 mu g l(-1) As, were 98, 101, 94, and 105%, respectively. Data are presented to demonstrate the effect of pH and competing anions on the retention of the arsenic species. The cartridges were tested in the UK and Argentina at sites where arsenic was known to be present in surface and groundwaters, respectively, at elevated concentrations and under challenging matrix conditions. In Argentinean groundwater, 4-20% of speciated arsenic was present as MA and 20-73% as As-III. In UK surface waters, speciated arsenic was measured as 7-49% MA and 12-42% DMA. Comparative data from the field method using SPE cartridges and the laboratory method using liquid chromatography coupled to ICP-MS for all water samples provided a correlation of greater than 0.999 for As-III and DMA, 0.991 for MA, and 0.982 for As-V (P < 0.01).

Item Type: Article
Additional Information: The original publication is available at http://www.springerlink.com
Uncontrolled Keywords: Arsenic, Field-based speciation, Solid-phase extraction, PLASMA-MASS SPECTROMETRY, SOLID-PHASE EXTRACTION, LIQUID-CHROMATOGRAPHY, DRINKING-WATER, ION-EXCHANGE, LA PAMPA, ICP-MS, PRESERVATION, GROUNDWATER, GENERATION
Divisions: Faculty of Engineering and Physical Sciences > Chemistry
Depositing User: Symplectic Elements
Date Deposited: 13 Jun 2012 12:02
Last Modified: 23 Sep 2013 19:19
URI: http://epubs.surrey.ac.uk/id/eprint/313828

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year


Information about this web site

© The University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom.
+44 (0)1483 300800