QUADRUPOLE MASS SPECTROGRAPHIC DEVICE

Japanese Patent JP3509424

B2

PROBLEM TO BE SOLVED: To accurately correct the deviation of the mass number of ions passing through a quadrupole, resulting from heat generation in a ceramic holder due to the dielectric loss thereof and a subsequent change in the relative position of electrodes.
SOLUTION: A strain sensor 40 fitted to a holder 35 is used to detect the deformation of the holder 35, and a strain operation part 26 arithmetically operates the amount of strain in the radius of the inscribed circles of rod electrodes 31 to 34. Furthermore, a correction amount calculation part 24 calculates a correction amount for applied voltage for correcting the deviation of a mass number, on the basis of a corresponding relationship between a preliminarily calculated strain amount and a correction amount for the applied voltage, and a voltage value control part 22 instructs a voltage generation part 20, regarding a voltage value corrected by the calculated correction amount. Also, a voltage generation part 20 applies the corrected voltage to the rod electrodes 31 to 34. As a result, ions having an intended mass number pass through a quadrupole filter 30 and arrive at a detector 14.

JP4212353	Probe for mass spectrometry of liquid samples
JPH06109701	INDUCTIVELY COUPLED PLASMA MASS SPECTROMETER

Tanaka, Yasufumi

JP28024696A

March 22, 2004

September 30, 1996

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SHIMADZU CORP

G01N27/62; H01J49/42; (IPC1-7): H01J49/42

小林 良平

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