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    • 43. 发明授权
    • Pressure activated sampling system
    • 压力激活采样系统
    • US07204125B2
    • 2007-04-17
    • US11087818
    • 2005-03-24
    • David H. FineFreeman W. Fraim
    • David H. FineFreeman W. Fraim
    • G01N30/72G01N33/22G01N35/10B01D15/08
    • G01N1/2202G01N2001/022G01N2001/024Y10S436/901Y10T436/141111Y10T436/163333Y10T436/170769Y10T436/173845
    • Screening of items for the presence of contaminants, such as explosives residue, is accomplished by subjecting an item loaded into a pressure chamber to a pressure substantially in excess of atmospheric pressure conditions and rapidly decompressing the item to the ambient atmospheric pressure. The rapid decompression serves to scavenge vapors and particles from the exterior and interior of the item and any objects it contains. A sample of the vapors and particles removed from the item by the rapid decompression is sampled and is tested to determine whether a predetermined contaminant is present in the sample. Depending on the types of contaminants for which the sample is tested, it is possible to detect whether explosives, biological or chemical agents, and/or narcotics residues are present on or in the item being screened.
    • 通过对装载到压力室中的物品施加基本上超过大气压力条件的压力并将物品快速减压至环境大气压来实现污染物(例如爆炸物残渣)的存在的筛选。 快速减压用于清除物品的外部和内部以及其包含的任何物体的蒸气和颗粒。 对通过快速减压从物品中除去的蒸气和颗粒的样品进行采样,并进行测试以确定样品中是否存在预定的污染物。 根据测试样品的污染物类型,可以检测爆炸物,生物或化学物质和/或麻醉剂残留物是否存在于待筛选的物品上。
    • 50. 发明授权
    • Method and apparatus for measuring the n-nitroso compound content of a
sample
    • 用于测量样品的n-亚硝基化合物含量的方法和装置
    • US3996002A
    • 1976-12-07
    • US614101
    • 1975-09-17
    • David H. Fine
    • David H. Fine
    • G01N31/00G01N21/52G01N31/10
    • G01N31/00Y10T436/170769
    • The N-nitroso compound content of a sample is measured by selectively breaking the N-NO bond in the N-nitroso compound molecule by non-catalytic pyrolyzation at temperatures in the range 300.degree. C to 500.degree. C, thereby liberating nitric oxide (NO), and by the subsequent measurement of the amount of nitric oxide liberated. The apparatus comprises a chromatograph and an NO detector together with a non-catalytic pyrolyzer. The pyrolyzer includes a chemically inert material configured to provide a cylindrical cross-section flow path for the chromatograph effluent. The pyrolyzer further includes the temperature control means for adding thermal energy at a controlled rate so that the flow path is characterized by temperatures in the range of 300.degree. C to 500.degree. C.
    • 样品的N-亚硝基化合物含量通过在300℃〜500℃的温度范围内的非催化热解选择性地破坏N-亚硝基化合物分子中的N-NO键来测定,从而释放出一氧化氮 ),并随后测量释放的一氧化氮的量。 该装置包括色谱仪和NO检测器以及非催化热解器。 热解器包括化学惰性材料,其被配置为提供色谱流出物的圆柱形横截面流动路径。 热解器还包括用于以受控速率加入热能的温度控制装置,使得流动路径的特征在于300℃至500℃范围内的温度。