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International Conference on Climate Change Global Warming

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The stability and reproducibility of Tris buffers in synthetic seawater

Author(s): Nemzer BV, Dickson AG

Abstract

The equimolal Tris buffer (0.04 mol/kg-H2O Tris + 0.04 mol/kg-H2O Tris-HCl) prepared in synthetic seawater of salinity 35 has been shown to be stable when sealed in a borosilicate glass bottle with a greased ground-glass stopper (drift rate ≤ 0.0005 in pH per year). The error in pH of such buffers resulting from uncertainties in the preparation of such buffers is typically less than 0.002 in pH (relative to the results of DelValls and Dickson, 1998 [DelValls, T.A., Dickson, A.G., 1998. The pH of buffers based on 2-amino-2-hydroxymethyl-1,3-propanediol (‘tris’) in synthetic sea water. Deep-Sea Research I, 45, 1541–1554]).

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