空気浴自動融点測定器 : 有機分析第66報

概要

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An automatic melting point apparatus (Fig.1 and 2) was designed with the air bath furnace and sample holder which were previously reported.^<5,6)> About 2 mg. of a sample is powdered and spread on one side of a piece of glass plate (10×75mm.), covered with another plate, and inserted into the furnace. The sample is irradiated by a lamp and the reflected scattering light is introduced into a phototube through a small lens. The temperature of the furnace is automatically elevated by turning the dial of a bimetal regulator, at the rate of about 6°/minute (Fig. 3). The heaters of the furnace are automatically intensified with increasing temperature by removing resistance by turns. The rise in temperature is stopped when the sample is melted and hence the scattering light decreased extremely, and the temperature is read on a mercury thermometer which is set close under the sample. The standard deviations of melting points measured in a wide range of temperature (Table I) proved that the apparatus was precise enough in the identification of organic compounds.
公益社団法人日本薬学会の論文
1967-04-25