Absolute salinity determination by oscillation-type densimetry and refractometry

Andreia Furtado; Andreia Napoleão; Jorge Pereira; Sara Moura; Raquel Quendera; Olivier Pellegrino

doi:10.1051/ijmqe/2022007

All issues

Volume 13 (2022)

Int. J. Metrol. Qual. Eng., 13 (2022) 10

Abstract

Open Access

Issue		Int. J. Metrol. Qual. Eng. Volume 13, 2022


Article Number		10
Number of page(s)		10
DOI		https://doi.org/10.1051/ijmqe/2022007
Published online		02 August 2022

Int. J. Metrol. Qual. Eng. 13, 10 (2022)

Research Article

Absolute salinity determination by oscillation-type densimetry and refractometry

Andreia Furtado¹^*, Andreia Napoleão², Jorge Pereira¹, Sara Moura¹, Raquel Quendera¹ and Olivier Pellegrino¹

¹ DMET-LNM, Instituto Português da Qualidade, I.P., Caparica, Portugal
² CQE-DQB, Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal

^* Corresponding author: afurtado@ipq.pt

Received: 11 October 2021
Accepted: 7 June 2022

Abstract

The determination of salinity values from SI traceable densimetry and refractometry measurement results enable SI traceability of the former. In this work, a short study of the metrological compatibility of salinity determinations via these two methods for sodium chloride in ultrapure water solutions and two different standard seawaters (OSIL and ERM) solutions, in the [35.0; 215.0] g kg⁻¹ interval, is presented. It evidenced the metrological compatibility of the salinity determinations in the referred interval. The largest salinity values enabled to test the matrix effect upon the determinations and concluded the preferable use of densimetry technique, when occurring.

Key words: Absolute salinity / densimetry / refractometry / metrological compatibility

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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