FIELD: test equipment. ^ SUBSTANCE: method can be used for making method of inspection of thermo-emission condition of surface-ionization ion thermo-emitter easier. It allows conducting inspection of effectiveness, uniformity and selectivity of ionization of organic compounds on the surface of thermo-emitter during common measurement cycle without usage of test samples of organic compounds. Atmospheric pressure air is pumped close to surface of thermo-emitter at volumetric speed of (2-10) l/min. Humidity of air is put under control. Constant voltage of (30-600) V is applied between thermo-emitter and ion collector. Thermo-emitter is subject to heating at constant speed of heating. Thermo-emitter ion current temperature dependence is registered. Values are determined which characterize peaks of ion current at preset temperature dependence (position of peaks, current intensity, width of peaks, and speed of raise of peak currents). Thermo-emission condition of thermo-emitter is judged from values of received cha
