Analytical procedures for determining Pb and Sr isotopic compositions in water samples by ID-TIMS

Autor(es)

Martins, Veridiana ^[1] ; Babinski, Marly ^[1] ; Ruiz, Izabel ^[1] ; Sato, Kei ^[1] ; Souza, Solange ^[1] ; Hirata, Ricardo ^[2]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Geociencias, Ctr Pesquisas Geocronol, BR-05508080 Sao Paulo - Brazil

^[2] Univ Sao Paulo, Inst Geociencias, Dept Geol Sedimentar & Ambiental, BR-05508080 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Química Nova; v. 31, n. 7, p. 1836-1842, 2008.
• Citações Web of Science: 2

Resumo

Few articles deal with lead and strontium isotopic analysis of water samples. The aim of this study was to define the chemical procedures for Pb and Sr isotopic analyses of groundwater samples from an urban sedimentary aquifer. Thirty lead and fourteen strontium isotopic analyses were performed to test different analytical procedures. Pb and Sr isotopic ratios as well as Sr concentration did not vary using different chemical procedures. However, the Pb concentrations were very dependent on the different procedures. Therefore, the choice of the best analytical procedure was based on the Pb results, which indicated a higher reproducibility from samples that had been filtered and acidified before the evaporation, had their residues totally dissolved, and were purified by ion chromatography using the Biorad® column. Our results showed no changes in Pb ratios with the storage time. (AU)

• Processo FAPESP: 04/05360-6 - Aplicacao de isotopos radiogenicos (pb e sr) e estaveis (h e o) como tracadores de recarga e da contaminacao de aquiferos metropolitanos: um exemplo da bacia do alto tiete.
• Beneficiário: Veridiana Teixeira de Souza Martins
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 02/07202-3 - Os impactos da urbanização nas águas subterrâneas na Bacia Hidrográfica do Alto Tietê (São Paulo)
• Beneficiário: Ricardo César Aoki Hirata
• Modalidade de apoio: Auxílio à Pesquisa - Regular