METHOD OF DROP-FREE ION FLOW FORMING AT ANALYZED ELECTRIC SPRAYING SOLUTIONS IN IONS SOURCES WITH ATMOSPHERIC PRESSURE

摘要

FIELD: physics.;SUBSTANCE: invention relates to mass-spectrometry. Method of forming drip-free continuous stable ion flow during analytes solutions electric spraying in sources of ions with atmospheric pressure is characterized by absence of drops formation in the beginning of electric spraying process, which substantially simplifies process of continuous and stable mono-dispersed flow of charged particles in wide range of sprayed liquid volumetric flow rates and, consequently, stable ion current of analyzed substances entering analyzer, as well as ion source long-term operation without disassembly and cleaning. Method features are: presence of solid controlled sliding gate valve from conducting material electrically connected to counter electrode, wherein counter electrode in initial state is closed by shutter. Besides, gas flow value pumped through coaxial channel before the beginning of electric spraying process, is set more than needed to obtain stable drop-free ion flow. At ions to analyzer inlet axis horizontal orientation meniscus from vertices of which charged particles emission in mode of drop-free continuous stable ion stream takes place, is installed at an angle to horizontal plane on ions to analyzer inlet axis.;EFFECT: enabling formation of drop-free continuous stable ion flow during analytes solutions electric spraying in ions sources with atmospheric pressure under normal conditions at the beginning and termination of solution spraying with taking into account of liquid meniscus deformation under action of gravity.;1 cl, 2 dwg