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    • 2. 发明申请
    • Method and apparatus for detecting the presence of elemental mercury in a gas sample
    • 用于检测气体样品中元素汞的存在的方法和装置
    • US20060246594A1
    • 2006-11-02
    • US11120317
    • 2005-05-02
    • Dirk AppelJames GrassiDieter KitaJeffrey Socha
    • Dirk AppelJames GrassiDieter KitaJeffrey Socha
    • G01N31/00
    • G01N21/6408
    • An improved elemental mercury analyzer utilizes a fluorescence assembly in combination with a fluorescence quenching reduction mechanism to detect the concentration of elemental mercury within an emission gas sample, via fluorescence of the mercury within the gas sample, while minimizing fluorescence quenching of the gas sample. In one arrangement, the analyzer contains the emission gas sample under a vacuum or negative pressure while detecting fluorescence of the elemental mercury within the emission gas sample. By performing fluorescence detection of the emission gas sample at reduced pressure relative to the pressure of the as-sampled emission gas, the analyzer reduces the number of particle collisions within the emission gas sample over a certain period of time. Such collisional deactivation, and/or the addition of oxygen depleted gas such as nitrogen to the gas sample, reduces fluorescence quenching of the emission gas sample, improving accuracy of detection of mercury.
    • 改进的元素汞分析仪利用荧光组合与荧光淬灭降低机制结合,以通过气体样品中汞的荧光检测发射气体样品中的元素汞的浓度,同时最小化气体样品的荧光猝灭。 在一种布置中,分析仪在真空或负压下包含发射气体样品,同时检测排放气体样品中的元素汞的荧光。 通过相对于采样排放气体的压力在减压下进行发射气体样品的荧光检测,分析仪在一定时间内减少了排放气体样品内的颗粒碰撞次数。 这种碰撞失活和/或向气体样品中添加贫氧气体如氮气可以减少发射气体样品的荧光猝灭,提高汞的检测精度。
    • 3. 发明申请
    • Method and apparatus for monitoring mercury in a gas sample
    • 用于监测气体样品中汞的方法和装置
    • US20060245973A1
    • 2006-11-02
    • US11120182
    • 2005-05-02
    • Dieter KitaJames GrassiJeffrey SochaDirk Appel
    • Dieter KitaJames GrassiJeffrey SochaDirk Appel
    • G01N33/00
    • G01N33/0013G01N1/4044G01N21/6404
    • Disclosed are a system and method for monitoring total mercury within a gas sample in a substantially continuous manner and for calibrating for both elemental and oxidized mercury. A converter of the Continuous Emission Monitoring System (CEMS) receives a gas sample containing vaporized mercury from a probe. The converter converts oxidized mercury present within the gas sample into an elemental mercury component and an oxidizing component using thermal cracking. The converter also reduces the pressure of the gas sample to minimize recombination of the elemental mercury component with the oxidizing components. A mercury analyzer of the system receives the reduced pressure gas sample from the converter and detects the fluorescence of the elemental mercury within the sample. The mercury analyzer holds the gas sample at the reduced pressure to reduce an effect of fluorescence quenching on the fluorescence of the elemental mercury within the sample and provides substantially accurate measurement of the concentration of the elemental mercury in the gas sample.
    • 公开了以基本上连续的方式监测气体样品中的总汞并用于校准元素和氧化汞的系统和方法。 连续排放监测系统(CEMS)的转换器从探头接收含有汽化汞的气体样品。 该转换器将气体样品中存在的氧化汞转化成元素汞组分和使用热裂解的氧化组分。 该转化器还降低气体样品的压力,以使元素汞组分与氧化组分的复合最小化。 系统的汞分析仪从转换器接收减压气体样品并检测样品中元素汞的荧光。 汞分析仪在减压下保持气体样品,以减少荧光猝灭对样品中元素汞的荧光的影响,并提供气体样品中元素汞浓度的基本准确的测量。
    • 4. 发明授权
    • Method and apparatus for monitoring mercury in a gas sample
    • 用于监测气体样品中汞的方法和装置
    • US07454952B2
    • 2008-11-25
    • US11120182
    • 2005-05-02
    • Dieter KitaJames H. GrassiJeffrey SochaDirk Appel
    • Dieter KitaJames H. GrassiJeffrey SochaDirk Appel
    • G01N7/00
    • G01N33/0013G01N1/4044G01N21/6404
    • Disclosed are a system and method for monitoring total mercury within a gas sample in a substantially continuous manner and for calibrating for both elemental and oxidized mercury. A converter of the Continuous Emission Monitoring System (CEMS) receives a gas sample containing vaporized mercury from a probe. The converter converts oxidized mercury present within the gas sample into an elemental mercury component and an oxidizing component using thermal cracking. The converter also reduces the pressure of the gas sample to minimize recombination of the elemental mercury component with the oxidizing components. A mercury analyzer of the system receives the reduced pressure gas sample from the converter and detects the fluorescence of the elemental mercury within the sample. The mercury analyzer holds the gas sample at the reduced pressure to reduce an effect of fluorescence quenching on the fluorescence of the elemental mercury within the sample and provides substantially accurate measurement of the concentration of the elemental mercury in the gas sample.
    • 公开了以基本上连续的方式监测气体样品中的总汞并用于校准元素和氧化汞的系统和方法。 连续排放监测系统(CEMS)的转换器从探头接收含有汽化汞的气体样品。 该转换器将气体样品中存在的氧化汞转化成元素汞组分和使用热裂解的氧化组分。 该转化器还降低气体样品的压力,以使元素汞组分与氧化组分的复合最小化。 系统的汞分析仪从转换器接收减压气体样品并检测样品中元素汞的荧光。 汞分析仪在减压下保持气体样品,以减少荧光猝灭对样品中元素汞的荧光的影响,并提供气体样品中元素汞浓度的基本准确的测量。
    • 5. 发明授权
    • Method and apparatus for detecting the presence of elemental mercury in a gas sample
    • 用于检测气体样品中元素汞的存在的方法和装置
    • US07354553B2
    • 2008-04-08
    • US11120317
    • 2005-05-02
    • Dirk AppelJames H. GrassiDieter KitaJeffrey Socha
    • Dirk AppelJames H. GrassiDieter KitaJeffrey Socha
    • G01N33/20G01N21/64G01J3/443
    • G01N21/6408
    • An improved elemental mercury analyzer utilizes a fluorescence assembly in combination with a fluorescence quenching reduction mechanism to detect the concentration of elemental mercury within an emission gas sample, via fluorescence of the mercury within the gas sample, while minimizing fluorescence quenching of the gas sample. In one arrangement, the analyzer contains the emission gas sample under a vacuum or negative pressure while detecting fluorescence of the elemental mercury within the emission gas sample. By performing fluorescence detection of the emission gas sample at reduced pressure relative to the pressure of the as-sampled emission gas, the analyzer reduces the number of particle collisions within the emission gas sample over a certain period of time. Such collisional deactivation, and/or the addition of oxygen depleted gas such as nitrogen to the gas sample, reduces fluorescence quenching of the emission gas sample, improving accuracy of detection of mercury.
    • 改进的元素汞分析仪利用荧光组合与荧光淬灭降低机制结合,以通过气体样品中汞的荧光检测发射气体样品中的元素汞的浓度,同时最小化气体样品的荧光猝灭。 在一种布置中,分析仪在真空或负压下包含发射气体样品,同时检测排放气体样品中的元素汞的荧光。 通过相对于采样排放气体的压力在减压下进行发射气体样品的荧光检测,分析仪在一定时间内减少了排放气体样品内的颗粒碰撞次数。 这种碰撞失活和/或向气体样品中添加贫氧气体如氮气可以减少发射气体样品的荧光猝灭,提高汞的检测精度。