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    Prospects for creating indicator systems based on ceramic materials
    (КПІ ім. Ігоря Сікорського ; ТОВ «Українська водна спілка», 2025) Voloshchuk, Anna; Dontsova, Tetiana
    The article presents the prospects for creating indicator systems based on ceramic membranes for field use. The aim of this work is to analyse the prospects and current approaches to creating indicator systems based on ceramic membranes modified with organic reagents, with an emphasis on detecting nitrogen-containing compounds and heavy metal ions in aqueous environments. It is noted that in order to create indicator ceramic membranes with high stability, sensitivity and selectivity, their preliminary modification is necessary. An analysis of methods for modifying ceramic materials indicates that covalent bonding is the most promising, but modifying membranes by polymer coating is more promising where high concentrations of analytes are required. Despite its simplicity, the direct adsorption method is not promising for the creation of long-term indicator membranes due to their low stability. It has been found that for the qualitative determination of nitro compounds, it is reasonable to use a simple method involving the use of iron(II) ions, which combines low cost, simplicity, stability and the possibility of effective immobilisation on ceramic materials. For the qualitative and quantitative determination of heavy metal ions, the creation of indicator membranes based on azo dyes, in particular chromazurol S, is promising. In this case, silicon(IV) oxide is the optimal ceramic carrier due to its high specific surface area and reactivity, which, in combination with modification by the polymer layer method, ensures the highest dye content, and by covalent bonding, the best stability. Thus, the article presents great prospects for the creation of indicator systems based on ceramic materials for obtaining indicator systems for field conditions.