Abstract The ionic strength (I) of a solution is a measure of the concentration of ions or a measure of the intensity of the electric field in a solution. In water treatment, the ionic strength allows the determination of total dissolved solids concentrations. In this work, different concentrations of MgSO4*7H2O in water are considered. This produces several levels of ionic strength. This varies from 0 M to 0.20 M. The ionic strengths of liquid samples are determined by means of their permittivities in the microwave frequency range. The dielectric constants do not exhibit significant differences within the measured frequency range; however, the loss factors show significant differences at low frequencies. The loss factors at 500 and 915 MHz are used to determine the ionic strength due to MgSO4*7H2O. The relationships between ionic strength and loss factor obey to second-grade polynomials. The results presented in this work contribute to the development of tools that allow the monitoring of water in real time and in a non-invasive way.

中文翻译：

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通过其在微波范围内的介电常数测定水中七水硫酸镁的离子强度

摘要 溶液的离子强度 (I) 是离子浓度的量度或溶液中电场强度的量度。在水处理中，离子强度允许测定总溶解固体浓度。在这项工作中，考虑了水中不同浓度的 MgSO4*7H2O。这会产生多个级别的离子强度。这在 0 M 到 0.20 M 之间变化。液体样品的离子强度是通过它们在微波频率范围内的介电常数来确定的。介电常数在测量的频率范围内没有表现出显着差异；然而，损耗因子在低频下表现出显着差异。500 和 915 MHz 的损耗因子用于确定 MgSO4*7H2O 引起的离子强度。离子强度和损耗因子之间的关系服从二级多项式。这项工作中提出的结果有助于开发允许以非侵入性方式实时监测水的工具。