In order to detect the elements in organic compounds, they have to be converted into their ionic forms. The ionic compounds formed during the fusion are extracted in aqueous solution and can be detected by simple chemical tests. ...

What is Lassaigne's extract and how it is prepared?

Preparation of Sodium Fusion Extract (Lassaigne's Extract)

Take a small piece of dry sodium in a fusion tube. Heat the tube slightly on a Bunsen burner so that the sodium melts to a shining globule. Add a pinch of the organic compound. Heat it slowly to start with so that the compound reacts with sodium metal.

Why is sodium used in Lassaigne test?

Note: Sodium is used in Lassaigne's test because of electropositive nature and in order to convert covalent form to ionic form. It is quite reactive in nature.