The dependences of the sonoluminescence intensity of cesium, lithium, and sodium in aqueous solutions of their salts at concentrations of 400–600 g/L on the ultrasound frequency and intensity were studied. Techniques for sonoluminescence determination of cesium, lithium, and sodium in highly concentrated solutions were developed using aqueous solutions of nuclear power plant (NPP) salt heat exchanger and brines as examples. It was shown that the relative standard deviation of the determination of cesium, lithium, and sodium in highly mineralized solutions of their salts decreased if the ultrasound frequency initiating the sonoluminescence was increased to 10–12 MHz at intensity 20 W/cm2. A technique for determining the content of the main substance in solutions of NPP salt heat exchanger and brines was developed. The results were checked for correctness by the method of additions and by analyzing samples by the alternative methods, namely, gravimetry and atomic absorption spectrometry. The results did not contain significant systematic errors. The possibility of analyzing hot NPP heat exchangers up to a temperature of 150°C was demonstrated.
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Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 89, No. 3, pp. 400–404, May–June, 2022. https://doi.org/10.47612/0514-7506-2022-89-3-400-404.
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Yurchenko, O.I., Chernozhuk, T.V., Baklanov, A.N. et al. Sonoluminescent Spectroscopy in the Determination of the Major Substance of Highly Concentrated Technological Solutions. J Appl Spectrosc 89, 500–504 (2022). https://doi.org/10.1007/s10812-022-01386-6
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DOI: https://doi.org/10.1007/s10812-022-01386-6