Patent ID: 6493081
Filing Date: 2002-12-10
Classification: F23N,G01N

Abstract:
A flame-type atomic absorption spectrophotometer which forms a flame by ignition of a mixture of a fuel gas and a first combustion support gas before forming a flame from another mixture of said fuel gas and a second combustion support gas, said spectrophotometer comprising:detecting means for detecting quantity of light from said flame; gas control means for independently controlling flow rates of said fuel gas, said first combustion support gas and said second combustion support gas which are supplied to a burner; and combustion control means for causing said gas control means to stop supplying said first combustion support gas and to start supplying said second combustion support gas to said burner based on the difference in quantity of light detected by said detecting means between at time of said ignition and after a change is made in gas flow rate to said burner.