ABSTRACT

Careful sampling, sample preparation, and subsequent measurements are key steps in handling complex, salt-affected mineral materials. Chemical analyses of ionic components in aqueous solutions (ion chromatography – IC) are nearly always affected by the presence of components originating mostly from the substrate; this causes discrepancies when calculating the equivalent concentrations. This study uses IC and scanning electron microscopy (SEM-EDS) results from the investigation of two historical, salt-laden buildings from Austria to determine the influence of different mineral substrates on the inorganic ionic compositions. Results show that besides carbonate substrates, also seemingly pure salt crusts may include impurities distorting the results and thus the interpretation of data by using the ECOS Runsalt model. The combined use of IC and SEM-EDS provided a reliable solution to assess complex salt-affected building materials.

摘要

仔细取样、样品制备和随后的测量是处理复杂、受盐影响的矿物材料的关键步骤。水溶液中离子成分的化学分析（离子色谱 - IC）几乎总是受到主要来自底物的成分的影响；这会导致计算等效浓度时出现差异。本研究使用 IC 和扫描电子显微镜 (SEM-EDS) 调查奥地利两座历史悠久的含盐建筑物的结果，以确定不同矿物基质对无机离子成分的影响。结果表明，除了碳酸盐基质外，看似纯净的盐壳也可能包含杂质，从而扭曲了结果，从而使用 ECOS Runsalt 模型解释数据。