Differentiate between the principle of estimation of nitrogen in an organic compound by (i) Dumas method (ii) Kjeldahl's method.

Differentiate between the principle of estimation of nitrogen in an or

1.	Differentiate between the principle of estimation of nitrogen in an organic compound by (i) Dumas method (ii) Kjeldahl's method.
Answer» Solution :(i) Dumas method: The organic compound is heated strongly with excess of CuO (Cupic Oxide) in an atmosphere of `CO_(2)`, where free NITROGEN, `CO_(2)` and `H_(2)O` are OBTAINED. (ii) Kjeldahl.s method: A known mass of the organic compound is heated strongly with conc. `H_(2)SO_(4)` , a little AMOUNT of potassium sulphate and a little amount of mercury (as catalyst). As a result of reaction, the nitrogen present in the organic compound is CONVERTED to ammonium sulphate.