Improvement of Zone Melting Apparatus. I. Zone Melting Apparatus with a Device to Prevent Breakage of a Sample Tube

概要

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A glass sample tube is widely used in zone melting of organic substances since it is transparent, inert to most substances and easily prepared in the laboratory. The glass tube, however, is frequently broken owing to the volume increase of the sample. A new device was worked out to prevent breakage of the sample tube, to purify the sample efficiently and to make replacement of the atmosphere inside the sample tube possible. The apparatus requires much less space than for one ever reported and consists of a sample tube with a set of stainless steel spring and Teflon plug and a new mechanism for carrying it. It was successfully used for biphenyl and <I>p</I>-dichlorobenzene.
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