Radiant energy – Ionic separation or analysis – With sample supply means
Patent
1984-08-08
1987-02-03
Anderson, Bruce C.
Radiant energy
Ionic separation or analysis
With sample supply means
250423R, 313 15, 313230, 3133621, H01J 4910
Patent
active
046410295
ABSTRACT:
Hitherto, ionizing strips (24) arranged on a magazine wheel located in the analyzer head of a mass spectrometer have first been preheated in the measuring position, then heated up and subsequently subjected to the actual measuring operation. The result of this has been that the same time-consuming heating operation has had to be repeated completely for another ionizing strip (24) ready for measurement. It has therefore been impossible to carry out measurements comparing ionizing strips (24) directly. However, to make this possible and, in general, reduce the time for the heating operations considerably, it is proposed that, to generate a stable ion emission, the samples located on the ionizing strips (24) be heated to a specific temperature in a preheating phase and held at this temperature, and thereafter be transferred into a heating-up phase, without the heating operation being interrupted and with the set temperature being maintained, and, after the end of the heating-up phase, subsequently be transferred into a measuring phase, without the heating operation being interrupted and with the set temperature being maintained, thus ensuring that there is always a number of them ready for measurement.
REFERENCES:
patent: 2756341 (1956-07-01), White
Christie et al., "Reliable Sample Changer . . . ", Rev. Sci. Instr. 37(3), Mar. 1966, pp. 336-337.
Rao et al., "Vacuum Lock . . . ", Journal of Physics E: Sci. Instr., vol. 9, 1976, pp. 205-207.
Lubin et al., "Sequential Sample Changer . . . ", Appl. Spectrosc. 20(1), 1966, pp. 40-43.
Habfast Karl-Eugen
Kappus Gunter
Rache Horst
Windel Bernd
Anderson Bruce C.
Berman Jack I.
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