Titre du document / Document title
Influence of soil type and extraction conditions on perchlorate analysis by ion chromatography
Auteur(s) / Author(s)
MACMILLAN Denise K. (1 2) ;
DALTON Shana R. (1 2) ;
BEDNAR Anthony J. (1 3) ;
WAISNER Scott A. (1 4) ;
ARORA Prem N. (1 2) ;
Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)
(1) Engineer Research and Development Center, Environmental Laboratory, 420 S 18th Street, Omaha, NE 68102, ETATS-UNIS
(2) Environmental Chemistry Branch-Omaha, 420 S 18th Street, Omaha, NE 68102, ETATS-UNIS
(3) Environmental Chemistry Branch-Vicksburg, 3909 Halls Ferry Road, Vicksburg, MS 39180, ETATS-UNIS
(4) Environmental Engineering Branch, 3909 Halls Ferry Road, Vicksburg, MS 39180, ETATS-UNIS
Résumé / Abstract
Perchlorate is a stable anion that has been introduced into the environment through activities related to its production and use as a solid rocket propellant. Perchlorate is thought to transport through soils without being adsorbed; thus, for determination of perchlorate in soil, samples are typically extracted with water prior to analysis. The completeness of extraction depends on perchlorate existing as a free ion within the soil matrix. In this study, perchlorate extraction efficiency was evaluated with five soil types under two different oxygen states. For each soil, 30% (w/w) slurries were prepared and equilibrated under either oxic or anoxic conditions prior to spiking with a stock solution of sodium perchlorate, and the slurries were then maintained for 1-week or 1-month. At the end of the exposure, slurries were centrifuged and separated into aqueous and soil phases. After phase separation, the soil was washed first with deionized water and then with 50 mM NaOH, producing second and third aqueous phases, respectively. Perchlorate concentrations in the three aqueous phases were determined using ion chromatography. The results obtained from this study suggest that matrix interference and signal suppression due to high conductivity have greater effects upon observed perchlorate concentrations by ion chromatography than does perchlorate interaction with soil. Thus, a single water extraction is sufficient for quantitative determination of perchlorate in soil.
Revue / Journal Title
Chemosphere
ISSN
0045-6535
CODEN CMSHAF
Source / Source
2007, vol. 67, n
o2, pp. 344-350 [7 page(s) (article)] (3/4 p.)
Langue / Language
Anglais
Editeur / Publisher
Elsevier, Kidlington, ROYAUME-UNI
(1972)
(Revue)
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Localisation / Location
INIST-CNRS, Cote INIST : 15565, 35400014548201.0170
Nº notice refdoc (ud4) : 18511807
