The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 08, 2014
Filed:
Aug. 06, 2010
Shiro Mizutani, Kyoto, JP;
Hiroshi Sugawara, Kyoto, JP;
Shiro Mizutani, Kyoto, JP;
Hiroshi Sugawara, Kyoto, JP;
Shimadzu Corporation, Kyoto-Shi, JP;
Abstract
As a control parameter given to a direct-current (DC) voltage generator which generates a DC voltage for ion selection, a 'mass-related offset' for allowing an adjustment of the offset for each mass-to-charge ratio is provided in addition to the 'gain' and “common offset” which respectively determine the gradient and position of a scan line drawn on a stability diagram during a mass-scan operation. In an automatic adjustment operation using a standard sample, under the control of an automatic regulator, the “gain” and “common offset” are initially set, after which the “mass-related offset” for each mass-to-charge ratio is determined so that the mass-resolving power will be substantially uniform, and these data are stored in a control data memory. In an analysis of a sample of interest, a quadrupole voltage controller controls the DC voltage generator and a radio-frequency (RF) voltage generator according to the control parameters read from the memory.