Prieto Taboada, Nagore
[Author];
Lama, Estibaliz
[Author];
Cristobal, David
[Author];
García-Arrona, Rosa
[Author];
Arana, Gorka
[Author];
Rodríguez, María Dolores
[Author];
Madariaga, Juan Manuel
[Author]
Validation and Demonstration of a Simultaneous Ionic Chromatography and Titration System for an Integrative Evaluation of Soluble Salt and its Relevance in Construction Materials Characterization
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Media type:
E-Book
Title:
Validation and Demonstration of a Simultaneous Ionic Chromatography and Titration System for an Integrative Evaluation of Soluble Salt and its Relevance in Construction Materials Characterization
Description:
A soluble salt analysis is crucial in the evaluation of the conservation state of construction materials. In this sense, there are European norms that indicate the way to measure them and the levels that are hazardous. However, in those norms only a few anions are included, the cations are undervalued, and the required analysis is not simultaneous. All of these could lead to incorrect conclusions because of the lack of representativeness of the real situation. In this work, a simultaneous ionic chromatography and titration system is validated and demonstrated for the integrative evaluation of soluble salt as alternative for the existing norms. The system has very good analytical parameters such as detection limits below 50 µg/g with good trueness and precision, even near the detection limits, with a wide calibration range. The demonstration of the system was carried out with samples from the main hall of Punta Begoña galleries (Getxo, Basque Country), an important protected building dated from the beginning of the 20th century. Thanks to the proposed analytical procedure, the main decaying pathways were identified, obtaining information that would be hidden if only the anions included in the norms were measured and achieving representative results of the formed salt by the simultaneous analysis. This work demonstrates the need of a change of mind in the soluble salt analysis regarding the ions included in the norms and the way to measure them