Abstract
There are two special points of this plasma jet light source as follows.A cathode rod is put horizontally into plasma jet to settle the cathode spot on the rod, and a space of an extremely high temperature comes out in the discharging hole in consequence of a thermal pinch effect.
Plasma jet flame formed at the upper part is not high temperature but about 3500-5000°K, and the spectral pattern is rather simple, then a small spectrometer can be used.
Solution samples are nebulized by nitrogen gas of 2.5kg/cm2 and 2.51/min.Then this nitrogen gas composes cyanogen, and emits CN bands in the flame.The emission of the CN bands seems to play an important part in the emission of the spectral lines.It is very effective to introduce argon gas of 1 atm and 2-3 1/min, and dilute the CN gas with the argon gas in order to observe spectral lines under a better condition.
