Melting Point Determination
A sample in a sealed capillary, attached to a thermometer with a rubber band, is immersed in the tube. Heating is commenced, and the temperature ranges at which the sample melts can be then be observed. During heating, the point at which melting is observed and the temperature constant is the melting point of the sample. A more modern method uses dedicated equipment, known as a melting point apparatus. A slow heating rate at the melting point is needed in order to get an accurate measurement. Record the temperature on the thermometer when the sample starts to melt and record the temperature again when all of the sample has melted (this gives you the melting point range). The Thiele tube in itself has many applications such as analyzing and synthesizing organic compounds such as aspirin.
Read more about this topic: Thiele Tube
Famous quotes containing the words melting and/or point:
“Between melting and freezing
The soul’s sap quivers.”
—T.S. (Thomas Stearns)
“I am, in point of fact, a particularly haughty and exclusive person, of pre-Adamite ancestral descent. You will understand this when I tell you that I can trace my ancestry back to a protoplasmal primordial atomic globule.”
—Sir William Schwenck Gilbert (1836–1911)