Rayleigh-Brillouin intensity ratios have been measured for a number of aqueous electrolytic solutions as a function of concentration. The calculated and experimental intensity ratios are in agreement within the experimental precision for solutions of alkali-metal and alkali-earth halides and nitrates at concentrations up to 3M, thus confirming applicability of simple concentration fluctuation theory for such systems. In solutions of 2–2 sulfates, the observed intensity ratios are significantly higher than the calculated values; the discrepancy remains to be explained although pronounced ionic association may be a factor.
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Maret et al. (1973) studied this question.
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