FIELD: analytical chemistry. SUBSTANCE: ion source used in mass spectrometry for elementary analyses of liquids and gases, in ion technology, etc. has discharge chamber provided with output slit. Working medium feeder in the form of capillary tube is passed into slit along its center line through insulator and connected to discharge chamber through high-voltage supply. Ion source also has ion extraction and focusing system. Wire length of 2-20 mm or metal ball is placed in top of capillary tube so that clearance between wire or ball and capillary tube wall is 2-5 microns. Ion source may have, in addition, annular hollow anode mounted in discharge chamber coaxially to capillary tube. Anode is connected to additional high-voltage supply so that negative pole of first supply is connected to capillary tube, positive pole, to annular anode, negative pole of second supply, to annular anode, and its positive pole, to discharge chamber. EFFECT: improved effectiveness of analysis due to more uniform admission of liquid into chamber; improved ionization of atomized atoms. 2 cl, 2 dwg
