|Author||Fujiwara, Shizuo ♦ Arakawa, Fumihiro ♦ Toi, Osamu|
|Publisher||The Japan Society for Analytical Chemistry|
|Subject Keyword||Refractive index ♦ hydrogen bonding ♦ water cluster ♦ human blood ♦ oxygen effect|
|Abstract||An anomalous fluctuation of the refractive index has been observed in the aqueous sodium chloride solution of about 0.1mol/l NaCl. The latter value orresponds to the salt concentration of the human blood. The fluctuation is just the same as that in the former experiment on the solution of 0.55mol/l, which corresponds to the salt concentration of seawater. For the elucidation of the source of the fluctuation, measurements have been made on the mixtures of the heavy water and the normal water, where a similar anomalous fluctuation has been found to occur at the concentration in the range from 15 to 20% by volume. This finding and the results of the quantum chemical calculation allow the fluctuation of the 0.1mol/l NaCl solution to be attributed to the fact that the concentration produces an interface of two structurally different phases for the solution. It is noted that the anomalous fluctuations are not observed when the dissolved oxygen is removed from the solutions.|
|Learning Resource Type||Article|
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