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DEEP-UV LED AND LASER INDUCED FLUORESCENCE DETECTION AND MONITORING OF TRACE ORGANICS IN POTABLE LIQUIDS
DEEP-UV LED AND LASER INDUCED FLUORESCENCE DETECTION AND MONITORING OF TRACE ORGANICS IN POTABLE LIQUIDS
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机译:深紫外LED和激光诱导的荧光检测和监测液态液体中的痕量有机物
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摘要
An apparatus for measuring fluorescence of potable liquids contained within an optical quartz cell includes a deep UV laser or a compact UV LED that generates a light beam. A UV blocking and visible light transmitting optical filter reduces out-of-band emission from the LED. The optical quartz cell is between a pair of plane mirrors so that light from the light source travels through it several times. A concave mirror collects a fluorescence signal and has a common optical axis with a lens. The common optical axis is normal to an optical axis of the light beam. The concave mirror and lenses are positioned on opposite sides of the optical quartz cell. A fluorescence detector is in optical alignment with the concave mirror and the lens. A boxcar averager is in electrical communication with the fluorescence detector. Optical wavelength selection of the fluorescence emission uses optical filters or a spectrometer.
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