Parameters of the temperature dependence of the rate of magnetic relaxation of protons in water and its solutions including seawater

• Published in: Journal of structural chemistry 2009-06, Vol.50 (3), p.461-469
• Main Authors: Melnichenko, N. A., Vyskrebentsev, A. S.
• Format: Article
• Language: English
• Subjects: Atomic; Atomic/Molecular Structure and Spectra; Chemistry; Chemistry and Materials Science; Inorganic Chemistry; Molecular; Optical and Plasma Physics; Physical Chemistry; Solid State Physics
• ISSN: 0022-4766; 1573-8779
• DOI: 10.1007/s10947-009-0069-0

The results of measurements of the temperature dependence of the relaxation rate (1/ T 1 ) of protons in seawater with 35‰ salinity and salt solutions with different concentrations at temperatures from −22°C to +120°C are presented. The possibility of approximating the temperature dependence of the magnetic relaxation rate by different functions in pure water, seawater, and solutions of the salts of the latter was studied. The parameters of this dependence and their variation under the influence of salt components are given. The least mean square deviation was obtained, and the best convergence was determined according to the statistical criteria for aqueous electrolytes of moderate concentrations for the function in the form of the sum of exponentials, in which the number of terms depended on the solution concentration. It is shown that the parameters of the thermal dependence of the relaxation rate represented by different functions can be used in combination for studying the dynamic properties of the solutions of low and moderate concentrations.