Measurements of Lower Humidities over Saturated Aqueous Salt Solutions

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  • 低湿度を与える塩類の飽和水溶液が示す相対湿度の測定
  • テイ シツド オ アタエル エンルイ ノ ホウワ スイヨウエキ ガ シメス ソ

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Abstract

Relative humidities lower than about fifty percent were measured by use of saturated aqueous solutions of certain inorganic salts in the range of 10° to 50°C.<BR>In some cases, a hydrate salt existing in solid phase converts to a lower hydrate salt at a given temperature. Discontinuous changes of relative humidity were shown near this transition point.<BR>Furthermore, it was found that there was a very small difference of relative humidities between pure and impure salts. We concluded that pure salt was not necessary for humidity control only, but that cheaper impure salt was enough.

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