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Rapid, high-precision potentiometric titration of alkalinity in ocean and sediment pore waters
Responsible organisation
1997 (English)In: Deep Sea Research Part I: Oceanographic Research Papers , Vol. 44, no 12, 2031-2044 p.Article in journal (Refereed)
Abstract [en]
A system for rapid, high precision potentiometric determination of alkalinity in sea water and sediment pore water is presented. Two titration units were used: a 40 ml unit for seawater and a small volume unit for sediment pore water. Titration time was normally less than 10 minutes per sample, including sample exchange. With a 40 ml sample volume, the relative standard deviation of the alkalinity obtained in the laboratory was 0.05% and at sea 0.1 %. The small-volume system (0.5–1.5 ml) gave a precision of 0.07%. Five titration points, in two groups after the second equivalence point, were used to evaluate the equivalence volume. Results from equilibrium calculations and computer simulated alkalinity titrations show that it was possible to use a non-modified Gran function [(V0 +v)*10(E/Z)] and still achieve good accuracy and precision.
Place, publisher, year, edition, pages
1997, 10 June 1998. Vol. 44, no 12, 2031-2044 p.
Keyword [en]
research methods, determination of alkalinity, sea water, sediment pore water
Identifiers
URN: urn:nbn:se:polar:diva-645DOI: 10.1016/S0967-0637(97)00088-5OAI: oai:DiVA.org:polar-645DiVA: diva2:568777
Note

Source: Polardok by Swedish Polar Research Secretariat

Available from: 2012-11-15 Created: 2012-11-15 Last updated: 2012-11-15

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