SALT IN SOILS: EXTRACTION AND ANALYSIS METHODS

I. Durickovic, G. Derombise, L. Framont-Terrasse, S. Thomann, M. Marchetti

Abstract

We demonstrate the importance of the sample preparation and extraction procedure for the soil salinity study. A comparison between the most commonly used techniques for the evaluation of salt amount in samples is presented. Several sample preparation and salt extraction procedures were tested. We calculated the efficiency for each procedure thanks to the preparation of soil samples with a precisely known salinity. This enabled us to determine which sample preparation and extraction procedure gives the best efficiency and accuracy. Hence, a series of measurement with the atomic absorption and potentiometry dosing was performed, these being the most commonly used techniques for the evaluation of salt amount in an aqueous sample. The goal of this study is to develop an analysis method for soils contaminated with road salt. The identification of the sample preparation offering the best efficiency will be selected in order to apply it for the development and the implementation of a new optical technique for the soil salinity determination.

Keywords

soil salinity, extraction techniques, atomic absorption, potentiometry dosing

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DOI

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IMEKO TC

TC19 - Environmental Measurements

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