| 摘要 |
It is an object of the invention to develop a generic method for identification of gases and a corresponding device, which has a simple structure and allows immediate and simultaneous detection of the chemical compounds to be tested, and which uses for identification the material-specific mobility and simultaneously the change in this mobility as a function of the electric field strength. This is achieved in that due to the resulting electric field, each ionized molecule has a drift velocity which is partially increased or decreased, wherein the resulting electric field is a DC field, on which an asymmetric AC field is superimposed. These methods and associated devices for the detection and identification of gases are used to identify and detect chemical compounds, in particular explosive and/or unhealthy substances or compounds, which must be detected in very small concentrations. |
