METHOD OF SEPARATING IONS OF ORGANIC AND BIOORGANIC COMPOUNDS BASED ON ION MOBILITY INCREMENT AND TRANSPORTATION OF SAID IONS INSIDE SUPERSONIC GAS STREAM Russian patent published in 2012 - IPC H01J37/05 H01J49/00 

FIELD: physics.

SUBSTANCE: basis of the invention is separating ions from an external source in an ion mobility increment spectrometer (IMIS) with a cylindrical symmetrical shape with a partitioned external electrode, where independently varying dispersion voltage and compensating voltage is applied across sections. These voltages facilitate focusing of the desired ions in the initial section of the drift channel near the middle of the analytical interval of the IMIS, their controlled shift to the outer surface of the external electrode in the middle part of the drift channel and controlled shift to the central electrode in the final part of the drift channel. This enables to primarily transmit desired ions with offset from impurity ions due to their probable dying at electrodes of the IMIS. Surviving ions, under the action of the electric field and a small portion of the gas stream entering the capillary which forms a supersonic gas stream, drift into that capillary and inside the supersonic gas stream coming out of that capillary and enter into the next mass analyser. Separation of signals from all ions focused inside the IMIS is possible based on detecting two-dimensional or four-dimensional distribution of flux density of the detected ions when scanning voltages which shift ions to electrodes of the IMIS.

EFFECT: invention provides, in addition to mass-spectrometric separation, separation of ions alternatively or in the development of existing separation methods and structural chemical analysis methods.

22 cl, 5 dwg