Method and apparatus for the comparative determination of an unk

Details Method and apparatus for the comparative determination of an unk Method and apparatus for the comparative determination of an unk

1978-08-15

1980-07-29

Smith, Jerry

Boots, shoes, and leggings

250282, 364498, 364567, G06F 1552, B01D 5944, H01J 3950

Patent

active

042154111

ABSTRACT:
Ions from an unknown and two known masses are fed through a quadrupole mass filter to an electron multiplier detector whose digitally converted output is supplied to a data processing device. The latter controls the alternating and DC signals fed to the paired electrode rods of the filter. The data processing device performs transformations on the mass characteristic curves derived from the ions to equalize their widths, heights and shapes, and then determines the distance between the normalized curves using a voltage shifting technique to superimpose the curves one on another. The unknown mass may then be accurately determined from the separation distances.

REFERENCES:
patent: 3920986 (1975-11-01), Fies, Jr.
patent: 4008388 (1977-02-01), McLafferty et al.
patent: 4066894 (1978-01-01), Hunt et al.

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