Abstarct: Non-thermal plasmas in dc glow discharges are generally created in closed discharge vessels using interior electrodes. DC glow discharges and related plasmas have been used in a large number of scientific fields more than a century. Their use as a spectroscopic source for analytical chemistry is only one application; they are much more widely used for other purposes, such as in the microelectronics industry and in materials technology, and also as lasers, various kinds of light sources, and plasma displays. DC glow discharge can be subdivided into various regions between cathode and anode. The actual position and the occurrence of the various regions depend on the discharge parameters, like pressure, voltage, current, kind of gas and distance between cathode and anode. One of these areas is positive column. Positive column is a region that is quasi-neutral,and is what Irving Langmuir had in mind when he defined plasma. Various parameters involved in the optimization of dc glow discharge devises. Electron density and electron tempreture are two of most fundamental parameters in gas discharge and play very important roles in understanding discharge physics and optimization of operation of plasmas. Different methods are available to measure electron density and electron temperature of which most commonly used are Langmuir probe, microwave interferometer, laser Thomson Scattering and optical emission spectroscopy. In between these methods, optical emission spectroscopy is most popular technique,because of it is simple and it is produces no perturbation in plasma. In this thesis, emission spectra, electron tempreture and electron density of positive column region of dc glow discharge have been measured at different currents and potentiales.