Automatic ionization mass spectrometer with a plurality of atmos

Details Automatic ionization mass spectrometer with a plurality of atmos Automatic ionization mass spectrometer with a plurality of atmos

1996-07-18

1997-09-16

Nguyen, Kiet T.

Radiant energy

Ionic separation or analysis

With sample supply means

250423R, 250285, H01J 4926

Patent

active

056683707

ABSTRACT:
An LC-MS is provided with a plurality of ion sources which can be quickly and selectively disposed at a fixed working position, and capable of analyzing a large variety of substances. An APCI unit (1) and an ESI unit (2) are fixedly mounted on a rotating table (11) or a sliding carriage (19). The rotating table (11) is held for rotation on a base (13) with a holding ring (12), and the sliding carriage (19) is held for linear sliding movement on a bearing (22) on a base (21) with a holding member (20) and is moved by a feed screw (23). Either the APCI unit (1) or the ESI unit (2) is selectively disposed at a fixed working position opposite to a first aperture (16), a second aperture (17) and a mass spectrometric unit (18) to ionize a substance for mass spectrometry. The plurality of ion sources can be set at the fixed working position by a simple setting operation, increases the variety of substances which can be analyzed, and enables the LC-MS to produce a plurality of mass spectra for a single substance to facilitate the analysis and the like of the molecular structure of the substance.

REFERENCES:
patent: 3723730 (1973-03-01), Gordon et al.
patent: 3796872 (1974-03-01), Merren
patent: 4960991 (1990-10-01), Goodley et al.
patent: 5103093 (1992-04-01), Sakairi et al.
patent: 5300785 (1994-04-01), Aitken
patent: 5315118 (1994-05-01), Mous
Hitachi Scientific Instrument News, '91, vol. 34, No. 1: Hitachi Model M-1000 LC/MS Spectrometer.

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