METHOD AND DEVICE FOR IDENTIFICATION OF ORGANIC COMPOUNDS Russian patent published in 2008 - IPC H01J49/40 G01N27/64 

FIELD: electric engineering.

SUBSTANCE: invention is related to the field of gas analysis, in particular of vapours of explosive, narcotic and poisoning substances. Method of organic compounds identification consists in measurement of volt-ampere characteristics with application of surface-ionisation source of ions, in which measurement of volt-ampere dependence is carried out in interval of voltages "thermal emitter of ions - electrode for ion current control" from U₁ to U₄, volt-ampere dependence section is separated from U₂ to U₃>U₁, in which value of current of organic compounds ions quadratically depends on value of voltage "thermal emitter of ions - electrode for ion current control", at that U₁ and U₄ are selected based on conditions U₄>U₃, U₁<U₂, at that volt-ampere dependence is used for determination of value of organic compounds ions drift mobility and/or for determination of energy activation value of organic compounds molecules ionisation on thermal emitter surface, at that for determination of organic compounds ions drift mobility value section is used from U₂ to U₃ of volt-ampere characteristic, and for determination of energy activation value of organic compounds molecules ionisation section is used from U₃ to U₄ of volt-ampere characteristic. Device is suggested for identification of organic compounds, which contains two structurally identical surface-ionisation sources of organic compounds ions, at that inlet openings of channels of nozzles for intake of analysed air flows of the first and second sources of ions are combined into common channel of common nozzle for intake of analysed air flow.

EFFECT: increase of accuracy of activation energy of organic compounds ionization.

3 cl, 5 dwg