METHOD OF OBTAINING AND ANALYSING ANALYTE IONS Russian patent published in 2010 - IPC G01N21/63 

FIELD: chemistry.

SUBSTANCE: method of obtaining and analysing analyte ions in a gas phase involves feeding analysed gas into an optical resonator formed by interference mirrors, whereby a stream of laser radiation simultaneously enters the optical resonator along its longitudinal axis from the interference mirror. Frequency of the laser radiation ω is converted by a nonlinear optical element to frequency ω_op for photoionisation of analyte molecules. After reflection from the interference mirrors of the optical resonator, laser radiation at frequency ω_op passes through the analysed gas several times. Analyte ions formed after multiple interactions of the laser radiation at frequency ω_op with the analysed gas are released and directed into a drift spectrometer, from which information signals enter a recording and processing system.

EFFECT: possibility of changing and adjusting degree of ionisation of the analyte, control and increasing sensitivity of analysing analyte ions in a gas phase.

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