Patent ID: 6245298
Filing Date: 2001-06-12
Classification: G01N

Abstract:
In a sample application device for a gas chromatograph comprising:an evaporator comprising (i) a receiving chamber having an inlet and exit, (ii) a valve head positioned at said inlet, (iii) an exchangeable sampling tube disposed within said receiving chamber and held therein by said valve head, (iv) cooling means and (v) temperature controlled heating means surrounding said sampling tube for cooling and heating, respectively, said sampling tube, (vi) means for supplying carrier gas and directing said carrier gas through said sampling tube, and (vii) means for connecting said exit to a chromatographic column,the improvement comprising:a pyrolyzer tube within said temperature controlled heating means and surrounding said sampling tube and held within said receiving chamber by said valve head, said pyrolyzer tube communicating with said means for supplying carrier gas to pass carrier gas through said sampling tube toward said exit, anda heating coil disposed inside said pyrolyzer tube and sized to receive said sampling tube, said heating coil connectable to an external power source through a conductor passing through said valve head.