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Journal of the Chilean Chemical Society

On-line version ISSN 0717-9707

Abstract

RIVAS, BENRABÉ L; SCHIAPPACASSE, L. NICOLÁS; PEREIRAU, EDUARDO  and  MORENO-VILLOSLADA, IGNACIO. ERROR SIMULATION IN THE DETERMINATION OF THE FORMATION CONSTANTS OF POLYMER-METAL COMPLEXES (PMC) BY THE LIQUID-PHASE POLYMER-BASED RETENTION (LPR) TECHNIQUE. J. Chil. Chem. Soc. [online]. 2004, vol.49, n.4, pp.345-350. ISSN 0717-9707.  http://dx.doi.org/10.4067/S0717-97072004000400014.

The Liquid-phase polymer-based retention (LPR) technique allows calculating the formation constant of polymer-metal ion complexes (Kf). The dependence of the relative error in Kf (eK) on the error in the total retention coefficient a (ea) has been searched and it was found that its influence is higher as a increases, so that its measurement must be performed with higher precision. In addition, ea is higher for high a values due to the stronger influence of errors in the measurements of the different magnitudes that allow its calculation. In order to achieve a measurement of Kf with a relative error lower than 7 %, the experimental a found should not exceed the value 0.4 when relative errors for the independent variables ranging between 2 % and 5 % are considered

Keywords : error; formation constant; polymer-metal complexes; simulation; ultrafiltration.

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