Salinity determinations by refractometry and oscillation-type densimetry as compatible methods

Napoleão, A.; Furtado, A.; Pereira, J.; Quendera, R.; Pellegrino, O.; Cidade, M. T.; Oliveira, C. R.

http://hdl.handle.net/10362/199318

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The purpose of the present communication is to study the metrological compatibility of measurement results of mass fractions of sodium chloride in aqueous solutions, by different analytical techniques: refractometry and oscillation-type densimetry. In complement pH measurements were made in solutions of NaCl of 3,5 cg g -1 and in a synthetic seawater standard (OSIL). Previously, metrological compatibility of measurement results with refractometer and oscillation-type density meter was showed for aqueous solutions of glucose, from 2 cg g -1 to 42 cg g -1 . Due to its interest for the food science and health science, sodium chloride mass fraction in aqueous solution between 0,5 cg g -1 and 7 cg g -1 and for brine systems were also measured. Comparison was displayed between potentiometric pH and pH deduced by salinity experimental value.

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General Physics and Astronomy

URI

http://hdl.handle.net/10362/199318

DOI

10.1088/1742-6596/1065/7/072037

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