DEVELOPMENT OF A FLOW-THROUGH CELL FOR ACCURATE MEASUREMENTS OF LOW ELECTROLYTIC CONDUCTIVITY

Chiara Boveri, Francesca Durbiano, Danilo Serazio

Abstract

The present paper focuses on the development of a flow-through cell and a closed circuit that permit to carry out measurements of low electrolytic conductivity of aqueous solutions under flowing condition. The traceability path has been set as follows: samples with conductivity between 200 mS cm^-1 and 50 mS cm^-1 have been employed for the calibration of the geometric constant of the new cell, by comparison with the primary cell of Istituto Nazionale di Ricerca Metrologica (I.N.Ri.M.). Then the flow-through cell has been used to measure values with decreasing conductivities down to 1 mS cm^-1. The measurement system capabilities have been evaluated to be limited by contamination effects.

Keywords

pure water, low conductivity measurement, flow-through cell

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IMEKO-WC-2009-TC24-450.pdf

DOI

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IMEKO TC

TC24 - Chemical Measurements

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