(19)
(11) EP 0 153 113 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
23.09.1987 Bulletin 1987/39

(43) Date of publication A2:
28.08.1985 Bulletin 1985/35

(21) Application number: 85300876

(22) Date of filing: 08.02.1985
(84) Designated Contracting States:
CH DE FR GB IT LI NL SE

(30) Priority: 10.02.1984 US 579211

(71) Applicant: FINNIGAN CORPORATION
 ()

(72) Inventors:
  • McFadden, William H.
     ()
  • Tucker, Michael G.
     ()

   


(54) Thermospray ion sampling device


(57) The performance of a thermospray ion source for liquid chromatograph/mass spectrometers is improved dramatically by providing a voltage gradient across the thermospray jet stream to increase the efficiency of transferring ions of all maases from the thermospray jet stream to the mass spectrometer, and in particular the intensity of high mass ions relative to low mass ions.






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