ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,704,487, issued on Aug. 11, was assigned to SHIMADZU Corp. (Kyoto, Japan).

"Method for mass spectrometry and chromatograph mass spectrometer" was invented by Manabu Ueda (Kyoto, Japan), Shinjiro Fujita (Kyoto, Japan) and Junichi Taniguchi (Kyoto, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "For a low-cost, high-accuracy tuning of the voltages applied to electrodes in a mass spectrometer, a chromatograph mass spectrometer (1) includes: a medium supplier (11) which supplies a medium as a mobile phase or carrier gas; a passage (15) which introduces, into the mass spectrometer, the medium supplied from the medium supplier; an ionizer (211) which ion...