Patent ID: 6627155
Filing Date: 2003-09-30
Classification: G01N

Abstract:
A system for analyzing elements in a sample comprising:a combustion member comprising one of a high-frequency heating furnace and an electric resistance furnace for receiving the sample; a source of oxygen gas connected to the combustion member to supply oxygen gas to the combustion member as the sample is heated to gasify the elements in the sample; a sample section connected to the heating member by an exhaust conduit for sampling at a constant interval and at constant amounts; a dust filter unit operatively connected to the exhaust conduit for removing dust; an oxidizing device operatively connected to the exhaust conduit for oxidizing the gas output of the combustion member; a dehumidifier for dehumidifying the gas output before the gasified elements are analyzed; a mass spectrometer; a conduit connecting the sampling section to the mass spectrometer whereby the gasified elements are analyzed quantitatively by the mass spectrometer to determine at least an element of C, S, and N to an accuracy of 0.1 ppm, and a feedback circulating system for recirculating the gasified elements from the exhaust conduit to the combustion member until all of the elements in the sample are gasified.