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1. 发明申请

US20010027927A1 Method and device for the detection of not easily volatized substances 有权
标题翻译：用于检测不易挥发物质的方法和装置
公开(公告)号：US20010027927A1
公开(公告)日：2001-10-11
申请号：US09824704
申请日：2001-04-04
申请人： Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V.
发明人： Michael Krausa , Klaus Schorb , Stefan Krebs , Frank Becker
IPC分类号： G01N027/26
CPC分类号： G01N33/0057 , G01N27/4045
摘要： A method for the detection of not easily volatized substances in particular of nitrotoluene, trinitrotoluene, dinitrotoluene, or derivatives of nitrotoluene as well as chemical warfare substances such as Clark, Lewisite, Lost, Sarin, Soman, Tabun or the like in soil, liquid and gases, wherein an electrode configuration, comprising at least a working electrode and an opposing electrode, is brought into contact with a substance under examination via an electrolyte and a voltage is applied to the working electrode whose value is increased and decreased at least once with substantially equal beginning and end values within a predetermined time period, wherein the current strength is determined during this at least one measurement cycle in dependence on the applied voltage, is distinguished in that a plurality of measurement cycles are scanned, and differences of current values of sequential measurement cycles are determined and, in the event of the occurrence of a cathode current maximum, the associated voltage value is determined, held constant and the current strength extracted. A device is thereby utilized with which the electrolyte is in the form of a thin layer applied to the end of the sensor element coming in contact with the substance under investigation, the sensor element comprising at least a working and an opposing electrode.
摘要翻译：在土壤，液体中检测不易挥发的物质，特别是硝基甲苯，三硝基甲苯，硝基甲苯或硝基甲苯的衍生物以及诸如Clark，Lewisite，Lost，Sarin，Soman，Tabun等的化学物质的挥发物质的方法。气体，其中至少包括工作电极和相对电极的电极配置通过电解质与被检查物质接触，并且将电压施加到工作电极上，该电极的值基本上增加至少减少一次在预定时间段内具有相同的起始值和结束值，其中根据所施加的电压在该至少一个测量周期期间确定电流强度，其特征在于扫描多个测量周期，以及顺序的当前值的差异确定测量周期，并且在发生阴极电流最大的情况下，确定相关电压值，保持恒定，并提取电流强度。因此利用这样一种装置，其中电解质呈薄膜形式，施加到与所研究的物质接触的传感器元件的端部，传感器元件至少包括工作电极和相对电极。

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