ОПРЕДЕЛЕНИЕ СИНТЕТИЧЕСКИХ КРАСИТЕЛЕЙ Е102, Е10, Е122 И Е124 В БЕЗАЛКОГОЛЬНЫХ НАПИТКАХ МОДИФИЦИРОВАННЫМИ ПЬЕЗОСЕНСОРАМИ

A method for the determination of synthetic dyes (tartrazine E102, yellow "solar sunset" E110, azorubin E122, ponso 4R E124) in soft drinks using piezoelectric sensors based on the molecularly imprinted polymers (MIP) is proposed. The values of the imprinting factor and the coefficients of selectivity of the obtained molecularly imprinted polymers of synthetic dyes are compared. The selectivity of the modified sensors to template molecules in the model and binary mixtures of synthetic dyes has been studied. It was shown that a sensor with the molecular imprint is the most sensitive to the dye that was the template for obtaining the selective coating. The additive method showed the absence of the "matrix" influence of the object (dye) on the value of the analytical signal of the sensors based on the polymers with molecular prints. The results of the determination of synthetic dyes by piezoelectric sensors with the standard techniques (spectrophotometry and thin-layer chromatography) were compared; it was shown that the difference in the determination results does not exceed 10%. According to its metrological characteristics, the method for determining synthetic dyes by piezoelectric sensors with MIP is in satisfactory agreement with the method of spectrophotometry. Keywords: synthetic dyes, modified piezosensor, molecularly imprinted polymers, the coefficient of selectivity, the imprinting factor  DOI: http://dx.doi.org/10.15826/analitika.2017.21.2.006 S.A. Khalzova, D.A. Krivonosova, *A.N. Zyablov, O.V. Duvanova Voronezh State University, Universitetskaya square, 1, Voronezh, 394018, Russia Federation