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    • 4. 发明授权
    • Method and device for detecting substances in an ambient substance, in
particular for detecting chemical warfare agents
    • 用于检测环境物质中的物质的方法和装置,特别是用于检测化学战剂
    • US5510268A
    • 1996-04-23
    • US308947
    • 1994-09-20
    • Hans-Rudiger DoringEberhard Hartmann
    • Hans-Rudiger DoringEberhard Hartmann
    • G01N27/66
    • G01N27/66Y10T436/16Y10T436/172307
    • The invention relates to a method and an apparatus for individually detecting in ambient air a predetermined gaseous warfare agent, namely a poison gas of the class of organic sulfuric or phosphorous substances, and a predetermined interfering compound, e.g. another poison gas. First, light O.sub.2 reaction ions are generated from water and are added in a measuring chamber to a mixture of the agent and the ambient air. As a result, the O.sub.2 reaction ions will deposit on the heavy molecules of the agent in a spatially non-uniform distribution to generate quasi-molecular ions. An electrical field alternating about a zero line and having a predetermined basic frequency and an amplitude is generated within the measuring chamber. The resulting quasi-molecular ion current is measured and resulting current signals are processed. For distinguishing the agent from the interfering compound, an initial experiment is made for a standardized measuring chamber. During the initial experiment, the quasi-molecular current is determined as a function of the basic frequency, of the amplitude and of a plurality of asymmetries of the electrical field variation relative to the zero line. Each current determination is carried out separately for the agent and for the interfering compound. Then a first measurement on the mixture of ambient air, agent and interfering compound is made with a first one of the asymmetries and, subsequently, a second measurement on the mixture is made with a second one of the asymmetries. The measured signals of these two measurements are logically combined to extract an output signal indicative of the presence of the agent and of the interfering compound within the ambient air.
    • 本发明涉及一种用于在环境空气中单独检测预定气体战剂(即有机硫酸或磷物质类别的毒气)和预定干扰化合物的方法和装置,例如, 另一种毒气。 首先,从水中产生轻O 2反应离子,并在测量室中加入试剂和环境空气的混合物。 结果,O2反应离子将以空间不均匀分布沉积在试剂的重分子上以产生准分子离子。 在测量室内产生围绕零线交替并具有预定基本频率和振幅的电场。 测量所得到的准分子离子电流,并对其产生电流信号。 为了将试剂与干扰化合物区分开,对标准化测量室进行初步实验。 在初始实验期间,准分子电流被确定为相对于零线的电场变化的幅度和多个不对称性的基本频率的函数。 对于试剂和干扰化合物分别进行每个电流测定。 然后用第一种不对称性对环境空气,试剂和干扰化合物的混合物进行第一次测量,随后用第二种不对称性对混合物进行第二次测量。 这两个测量的测量信号被逻辑地组合以提取指示在空气中的试剂和干扰化合物的存在的输出信号。