Patent ID: 6205841
Filing Date: 2001-03-27
Classification: G01N,Y10T

Abstract:
A gas chromatograph comprising:a flame photometric detector having;a hydrogen flame formed by combusting a mixture of hydrogen and oxygen,a sample tube for introducing a sample to said flame,at least two different wavelength filters transmitting only the light with target wavelengths corresponding to respective target components of said sample,at least two optical detectors detecting said light transmitted through said filters, respectively,a chromatographic column, connected to said sample tube, each of said target components included in said sample being separated during passage through said column;a hydrogen gas tube supplying said flame photometric detector with said hydrogen;an oxygen gas tube supplying said flame photometric detector with said oxygen;a first mass flow controller controlling a flow rate of said hydrogen;a second mass flow controller controlling a flow rate of said oxygen; andcontrol means for controlling at least one of said first mass flow controller and said second mass flow controller to achieve different optimum mixture rates of said hydrogen and said oxygen for combustion of each of said components in said sample.