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US 6,493,081 B1Granted
Flame-type atomic absorption spectrophotometer
AssigneeShimadzu Corporation
InventorHidehisa Nishigaki
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AssigneeShimadzu Corporation
InventorHidehisa Nishigaki
Estimating the term…
A flame-type atomic absorption spectrophotometer forms a flame by igniting a mixture of a fuel gas and a first combustion support gas such as air and then the first combustion support gas is replaced by a second combustion support gas such as nitrous oxide with a faster combustion speed. An optical sensor is disposed near the flame to detect the quantity of light therefrom. A gas flow rate control device independently controls the flow rates of the fuel gas, the first combustion support gas and the second combustion support gas to the flame. A combustion control unit serves to switch the gas to be supplied to the flame from the first combustion support gas to the second combustion support gas, based on how much the quantity of light detected by the optical sensor changes between the time of ignition and after the flow rate of the fuel gas and/or the first combustion support gas is changed.
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:
Dependencies are inferred from the claim text.