Speciation of As(III) and As(V) in water and sediment using reverse-phase ion-pair high-performance liquid chromatography-neutron activation analysis (HPLC-NAA)

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dc.contributor.author Tulasi, D.
dc.contributor.author Adotey, D.
dc.contributor.author Affum, A.
dc.contributor.author Carboo, D.
dc.contributor.author Serfor-Armah, Y.
dc.date.accessioned 2018-12-06T12:39:16Z
dc.date.available 2018-12-06T12:39:16Z
dc.date.issued 2013-10
dc.identifier.other Volume 185, Issue 10, pp 7979–7991
dc.identifier.uri http://ugspace.ug.edu.gh/handle/123456789/26253
dc.description.abstract Total As content and the As species distribution in water and sediments from the Kwabrafo stream, a major water body draining the Obuasi gold mining community in southwestern Ghana, have been investigated. Total As content was determined by instrumental neutron activation analysis (INAA). Ion-pair reverse phase high-performance liquid chromatography-neutron activation analysis (HPLC-NAA) was used for speciation of As species. Solid phase extraction with phosphate buffer was used to extract soluble As species from lyophilized sediment. The mass balance after phosphate extraction of soluble As species in sediment varied from 89 to 96 %. Compositionally appropriate reference material International Atomic Energy Agency (IAEA)-Lake Sediment (SL)-1 was used to check the validity of INAA method for total As determination. The measured values are in good agreement with the IAEA recommended value and also within the 95 % confidence interval. The accuracy of the measurement in terms of relative deviation from the IAEA recommended value was ±0.83 %. "In-house" prepared As(III) and As(V) standards were used to validate the HPLC-INAA method used for the As species determination. Total As concentration in the water samples ranged from 1.15 to 9.20 mg/L. As(III) species in water varied from 0.13 to 0.7 mg/L, while As(V) species varied from 0.79 to 3.85 mg/L. Total As content in sediment ranged from 2,134 to 3,596 mg/kg dry mass. The levels of As(III) and As(V) species in the sediment ranges from 138 to 506 mg/kg dry mass and 156 to 385 mg/kg dry mass, respectively. © 2013 Springer Science+Business Media Dordrecht. en_US
dc.language.iso en en_US
dc.publisher Environmental Monitoring and Assessment en_US
dc.subject Arsenic en_US
dc.subject Ghana en_US
dc.subject HPLC-NAA en_US
dc.subject Sediment en_US
dc.subject Speciation en_US
dc.subject Water en_US
dc.title Speciation of As(III) and As(V) in water and sediment using reverse-phase ion-pair high-performance liquid chromatography-neutron activation analysis (HPLC-NAA) en_US
dc.type Article en_US


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