Chemistry: electrical and wave energy – Apparatus – Coating – forming or etching by sputtering
Patent
1993-04-08
1994-04-26
Niebling, John
Chemistry: electrical and wave energy
Apparatus
Coating, forming or etching by sputtering
2041801, 250288, 250423R, 250423F, G01N 2726, G01N 27447, H01J 4904, H01J 4910
Patent
active
053064127
ABSTRACT:
The subject invention teaches the use of mechanical vibration to enhance the electrostatic dispersion of sample solutions into the small, highly charged droplets that can produce ions of solute species for mass spectrometric analysis. Such vibration turns out to be surprisingly effective at ultrasonic frequencies for solutions with flow rates, conductivities and surface tensions too high for stable dispersion by electrostatic forces alone as in conventional electrospray ionization. Several embodiments of the invention are described for purposes of illustration. Other possible embodiments will become apparent to those skilled in the art.
REFERENCES:
patent: 4570068 (1986-02-01), Sakairi et al.
patent: 4667100 (1987-05-01), Lagna
patent: 5157260 (1992-10-01), Mylchreest et al.
Fenn John B.
Shen Shida
Smith Cawthon
Whitehouse Craig M.
Analytica of Branford, Inc.
Niebling John
Starsiak Jr. John S.
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