Salinity determinations by refractometry and oscillation-type densimetry as compatible methods: from salinity to pH

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

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Abstract

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.

Original languageEnglish
Article number072037
JournalJournal Of Physics: Conference Series
Volume1065
Issue number7
DOIs
Publication statusPublished - 13 Nov 2018
Event22nd World Congress of the International Measurement Confederation, IMEKO 2018 - Belfast, United Kingdom
Duration: 3 Sep 20186 Sep 2018

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