The effect of filtration on analyses of surface water samples. A study from the Salars of Coipasa and Uyuni, Bolivian Altiplano

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

“…44 Other authors 8,30,45,46 have also recommend acidifying the water samples with suprapur HNO 3 to pH<2. Bank et al 35 also examines the effect of filtration on surface water analysis. In this case, samples have a high pH and high particulate content.…”

“…17,25 Some authors use isotopes to investigate atmospheric emissions, 26,27 sediments 28,29 and rain/snow, 9,[30][31][32][33] and others analyze superficial or sub-superficial waters 34 with higher Sr and Pb concentrations. [34][35][36] This paper is focused on urban groundwater that has pH values ranging from 5 to 7 and contains some suspended material. There are currently no articles in the literature about Pb isotope determination by ID-TIMS (isotope dilution and thermal ionization mass spectrometer) in groundwater from an urban sedimentary aquifer.…”

Aplicação de isótopos de Pb, Sr, H e O como traçadores da recarga e da contaminação de aqüíferos metropolitanos: um exemplo da Bacia do Alto Tietê

“…A filtragem das amostras de água após a amostragem, antes da análise, é necessária para remover qualquer particulado da água, de modo que só a fração dissolvida de um elemento seja analisada (Banks, et al, 2005). Alguns utilizam filtros com poros de 0,2 µm (Luck & Ben Othman, 2002;Petelet et al, 1998;Takeda et al, 2000;Viers et al, 2000), enquanto outros usam filtros de 0,45µm (Aquilina et al, 2005;Barbieri et al, 2005;Frost & Toner, 2004;Hinrichs et al, 2002;Ojiambo et al, 2003;Siegel et al, 2000;Toner et al, 2003).…”