Возможность применения люминесцентной спектроскопии для анализа фталатов путем их преобразования во флуоресцеин

The possibility of using the conversion of phthalates to fluorescein by preliminary hydrolysis of phthalates to phthalic acid followed by its dehydration into phthalic anhydride and the interaction of latter with resorcinol in analytical luminescence spectroscopy for the phthalates detection was considered. The formation of luminescent by-products of the auto-condensation reaction of resorcinol molecules supposedly with own oxidation and decomposition products was revealed. The luminescence spectrum of a by-products mixture of resorcinol transformation is overlapped with the spectrum of fluorescein and the relative quantum yield of mixture luminescence was 25%. This fact obstructs the use of this reaction for analytical purposes, since it requires special care in the sample preparation procedure and selection of reaction conditions to minimize or eliminate the formation of luminescent by-products.