Abstract
The paper presents the results of assessing the sorption and fluorescence properties of compounds from the azolotriazine class and phases based on cadmium sulfide quantum dots in the presence of volatile organic compounds (biomarkers of the state of living systems). The sorption properties of phases based on organic dyes and encapsulated semiconductors in relation to vapors of alcohols, ketones, amines, acids, ammonia, and aldehydes were studied using direct high-sensitivity quartz crystal microgravimetry. Spectral properties and their changes in the presence of analyte vapors were studied using various spectroscopic methods (absorption, photoluminescence). The results of these studies and the possibility of optimizing this stage were compared. It is proposed to evaluate the consistency of methods for predicting changes in fluorescence properties in test systems for volatile organic compounds using Kendall’s W concordance coefficient. It was found that the highest concordance coefficient (W = 0.89) was obtained with the methods of spectrofluorimetry and direct vapor microgravimetry when sorption occurs on phases—potential fillers for test systems. The correlation of results obtained by different fluorescence methods (visual plate test systems and fluorimetry of phases on paper substrates) is 0.80, which confirms a high degree of consistency in assessing the interaction between analytes and organic, combined fluorochromes. It was established that methods similar in the nature of their analytical response are not better aligned with each other than with the method of direct vapor microgravimetry on microphases of fluorimetric reagents of different natures (CdS/chitosan quantum dots, organic compounds of the azolotriazine class, mixed phases). This, in turn, allows for the selection of simpler, more accessible, and rapid methods and tools for analysis during routine experiments.
Published Version
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