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:
“O ruddier than the cherry,
O sweeter than the berry,
O Nymph more bright
Than moonshine night,
Like kidlings blithe and merry.
Ripe as the melting cluster,
No lily has such lustre,
Yet hard to tame,
As raging flame,
And fierce as storms that bluster.”
—John Gay (1685–1732)
“Sleaze is a point by point refutation of elegance.”
—Mason Cooley (b. 1927)