Flame Atomic Absorption Photometer
AssigneeShimadzu Corporation
InventorsNobuyuki IWAI, Tomoari KOBAYASHI, Takuya KIMOTO, Osuke KOBAYASHI
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Abstract
The present invention provides a flame atomic absorption photometer including a burner 110 configured to form a flame by burning a mixture of a mixed gas of a fuel gas and a combustion-assisting gas and a nebulized sample liquid, flame light detection units 181 and 182 configured to detect light radiated from the flame, and a ceased flame determination unit 162 configured to determine that the flame has ceased when the intensity of the light detected by the flame light detection unit is lower than a predetermined threshold value, wherein the flame light detection unit is configured to selectively detect light having a wavelength of 290 nm or more and 330 nm or less.
Claims8
A flame atomic absorption photometer comprising:
- a burner configured to form a flame by burning a mixture of a mixed gas of a fuel gas and a combustion-assisting gas and a nebulized sample liquid;
- a flame light detection unit configured to detect light radiated from the flame;
- and
- a ceased flame determination unit configured to determine that the flame has ceased when the intensity of the light detected by the flame light detection unit is lower than a predetermined threshold value;
- wherein
- the flame light detection unit is configured to selectively detect light having a wavelength of 290 nm or more and 330 nm or less.
A flame atomic absorption photometer comprising:
- a burner configured to form a flame by burning a mixture of a mixed gas of a fuel gas and a combustion-assisting gas and a nebulized sample liquid;
- a flame light detection unit configured to detect light radiated from the flame and selectively detect light having a wavelength of 290 nm or more and 330 nm or less;
- a swan band light detection unit configured to selectively detect light of a C2 swan band among light radiated from the flame;
- and
- a backfire sign determination unit configured to determine that there is a sign of backfire when a ratio of a light intensity detected by the swan-band light detection unit to a light intensity detected by the flame light detection unit falls below a predetermined threshold value.
A flame atomic absorption photometer comprising:
- a burner configured to form a flame by burning a mixture of a mixed gas of a fuel gas and a combustion-assisting gas and a nebulized sample liquid;
- a flame light detection unit configured to detect light radiated from the flame and selectively detect light having a wavelength of 290 nm or more and 330 nm or less;
- a bright flame detection unit configured to selectively detect light having a wavelength of 800 nm or more and 1100 nm or less among the light radiated from the flame;
- and
- an incomplete combustion determination unit configured to determine that incomplete combustion has occurred when a ratio of a light intensity detected by the bright flame detection unit to a light intensity detected by the flame light detection unit exceeds a predetermined threshold value.
A flame atomic absorption photometer comprising:
- a burner configured to form a flame by burning a mixture of a mixed gas of a fuel gas and a combustion-assisting gas and a nebulized sample liquid;
- a flame light detection unit configured to detect light radiated from the flame and selectively detect light having a wavelength of 290 nm or more and 330 nm or less;
- a bandpass filter configured to selectively transmit light having a wavelength of 800 nm or more and 1100 nm or less;
- an image sensor including a plurality of light detection elements arranged two-dimensionally and configured to receive light radiated from the flameburner and passing through the bandpass filter;
- a soot accumulation determination unit configured to determine that soot is accumulated on the burner, by obtaining, for each of the plurality of light detection elements, a ratio of a light intensity detected by the light detection element to a light intensity detected by the flame light detection unit, and when a predetermined number or more of the plurality of light detection elements have the ratio exceeding a predetermined threshold value;
- and
- a notification unit configured to, when the soot accumulation determination unit determines that soot is accumulated on the burner, notify a user of the determination.
Dependencies are inferred from the claim text.