FIELD: physics.
SUBSTANCE: invention relates to ion-drift and mass spectrometry and can be widely used in solving analytical tasks of organic and bioorganic chemistry, immunology, biotechnology, forensics science, proteomics, metabolomics at electrospraying of solutions of analyzed labile substances. Device for formation of drop-free ion stream during electrospraying of analyzed solutions in ion sources with atmospheric pressure is made in form of coaxial capillaries. Inner metal capillary is under ground potential, fluid pump supplies analyzed solution through it. At end of that capillary meniscus is formed, from surface of which ion flow is formed by electrospraying. Coaxial gap between capillaries is connected to air controlled extraction pump. Opposite to meniscus there is flat counter electrode with hole in center closed with sliding shutter, which are electrically connected to each other and are connected to high-voltage controlled source of supply. Sliding shutter shuts off penetration of drops in ion flow analyzer at beginning of electrospraying process and at its completion if process is not stationary. In version of horizontal orientation of hole axis in opposite electrode capillary, in end of which there is meniscus of sprayed solution is installed at angle to axis in horizontal plane for compensation of symmetry deformation of conical shape of meniscus under action of gravity.
EFFECT: obtaining drop-free ion flow at electrospraying of analyzed solutions in ion sources with atmospheric pressure under normal conditions, hence continuous stable spraying, stable operation of analyzer and stability of recorded spectra, reduced frequency of servicing of ion flow transfer device into analyzer for its cleaning.
1 cl, 2 dwg
