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    • 4. 发明授权
    • Method and system for sampling and determining the presence of compounds
    • 用于取样和确定化合物存在的方法和系统
    • US5470754A
    • 1995-11-28
    • US20804
    • 1993-02-22
    • David P. RounbehlerDavid H. FineEugene K. AchterStephen J. MacDonaldDaniel B. Dennison
    • David P. RounbehlerDavid H. FineEugene K. AchterStephen J. MacDonaldDaniel B. Dennison
    • B07C5/34B08B9/46B29B17/00B29B17/02G01N1/00G01N1/22G01N1/24G01N21/64G01N21/76G01N21/90G01N33/00G01N33/44
    • B07C5/34B07C5/3408B08B9/46B29B17/00B29B17/02G01N1/2226G01N21/64G01N21/766G01N21/9018B08B2203/005B29B2017/0275G01N1/2202G01N1/24G01N2001/2223G01N2001/2229G01N2033/0081G01N21/76Y02W30/62Y02W30/622Y10T436/113332Y10T436/17Y10T436/206664Y10T436/21
    • A system and method are provided for minimizing the effects of background signals in masking signals indicating the presence of substances to be detected such as contaminants in materials moving rapidly along a conveyor. The contaminants detected may include nitrogen containing compounds and hydrocarbons. The system and method of the present invention minimize during detection of the presence or absence of such substances, the number of falsely positive indications of the presence of such substances due to background signals and changes in background signals. The substances detected are divided into first and second sample portions and the respective portions are heated. The first heated portion is mixed with ozone to cause a chemical reaction therewith in order to generate radiation by chemiluminescence having characteristic wavelengths related to substances in the first portion. The second portion heated is also mixed with ozone to cause a chemical reaction therewith in order to generate radiation by chemiluminescence having characteristic wavelengths related to substances in the second portion. The radiation of the respective first and second portions is selectively detected. The heating and detecting steps are performed in a manner so as to yield a higher level of detected radiation from one of the portions of the sample then the other for at least some of the selected compounds being detected. Electrical signals from the respective first and second portions are generated and compared in order to determine the presence or absence of selected compounds in the sample. Appropriate reject signals for a bottle sorting system are generated accordingly.
    • 提供了一种系统和方法,用于最小化背景信号在屏蔽指示待检测物质的存在的信号中的影响,例如沿着传送器快速移动的材料中的污染物。 检测到的污染物可能包括含氮化合物和碳氢化合物。 本发明的系统和方法在检测到这种物质的存在或不存在期间最小化了由于背景信号和背景信号的变化而导致的这种物质的存在的错误的阳性迹象的数量。 所检测的物质被分成第一和第二样品部分,并且各个部分被加热。 将第一加热部分与臭氧混合以引起与其的化学反应,以通过具有与第一部分中的物质相关的特征波长的化学发光来产生辐射。 加热的第二部分也与臭氧混合以引起与其的化学反应,以通过具有与第二部分中的物质相关的特征波长的化学发光产生辐射。 选择性地检测相应的第一和第二部分的辐射。 加热和检测步骤以这样的方式进行,以便从样品的一个部分产生更高水平的检测到的辐射,然后对于检测到的至少一些所选化合物产生另一个。 产生并比较来自相应的第一和第二部分的电信号,以确定样品中选定化合物的存在或不存在。 相应地生成用于瓶分选系统的适当拒绝信号。
    • 8. 发明授权
    • Method and apparatus for extraction of airborne N-nitroso compounds
without artifact formation
    • 用于提取无人造物形成的空气中N-亚硝基化合物的方法和装置
    • US4249904A
    • 1981-02-10
    • US61554
    • 1979-07-27
    • David P. RounbehlerJohn W. Reisch
    • David P. RounbehlerJohn W. Reisch
    • B01D53/54B01D53/02B01D53/04B01J20/281G01N1/22G01N31/00G01N31/22G01N33/00C01G28/00G01N27/62
    • G01N33/0047B01D53/02G01N31/224G01N33/0013Y10T436/170769Y10T436/255
    • A method and apparatus are disclosed for extracting N-nitroso compounds from air samples without artifact formation of nitrosamines from precursors in the sample. The apparatus includes a cartridge having two zones between a first port and a second port. The first zone, closest to the first port, contains an air pervious packing of a granular, solid phase amine complexing agent. The second zone, closest to the second port, contains an air pervious packing of a mixture of a granular, solid phase amine complexing agent and a particulate sorbent adapted to extract and concentrate N-nitroso compounds from air. The method includes a first step of driving an air sample through the first and second contiguous zones of the cartridge in succession, and a second step of driving an eluent through the second and first zones in succession, or backflushing the cartridge. To extract N-nitroso compounds, the eluent is a polar, or nitrogenous based, solvent for both N-nitroso compounds and the amine complexing agent in the second zone of the cartridge. The method may contain the further step of determining the N-nitroso compound concentration of at least a portion of the eluate which passes from the first zone following the second step of the method.
    • 公开了一种用于从空气样品中提取N-亚硝基化合物的方法和装置,该样品中的前体不产生亚硝胺的伪影。 该装置包括在第一端口和第二端口之间具有两个区域的盒。 最靠近第一口的第一区包含颗粒状固相胺络合剂的透气性填料。 最靠近第二口的第二区包含颗粒状固相胺络合剂和适于从空气中提取和浓缩N-亚硝基化合物的颗粒状吸附剂的混合物的透气填料。 该方法包括第一步骤,其连续地驱动空气样品通过盒的第一和第二连续区域;以及第二步骤,连续驱动洗脱液通过第二和第一区域或反冲洗墨盒。 为了提取N-亚硝基化合物,洗脱液是两种N-亚硝基化合物的极性或含氮基溶剂,以及药筒第二区中的胺络合剂。 该方法可以包含在该方法的第二步骤之后测定从第一区域通过的至少一部分洗脱液的N-亚硝基化合物浓度的进一步步骤。