Title:
レーザー脱離イオン化質量分析装置及びレーザーパワー調整方法
Document Type and Number:
Japanese Patent JP7279853
Kind Code:
B2
Abstract:
One mode of the present invention provides a laser power adjustment method for ionization in a laser desorption/ionization mass spectrometer, the laser power adjustment method including: a measurement step (S 1) in which intensity information on ions derived from a specific component in a specimen are acquired while changing laser power in n stages (n is 3 or more) for the identical specimen; and a processing step (S2, S6, and S7) in which a slope of a straight line connecting two adjacent plot points on a laser power axis is calculated in a two-axis graph in which a relationship between n ionic intensities obtained by the measurement step or a signal value, which is an SN ratio obtained from the ionic intensities, and laser power is plotted; an index value reflecting a ratio between a forward slope value, which is a slope of a straight line on a front side of the plot point, and a backward slope value, which is a slope of a straight line on a rear side, is obtained for each plot point; and appropriate laser power is selected using the index value.
Inventors:
Akifumi Inaga
Satoko Yoda
Tatsuki Okubo
Tomonori Oshikawa
Hiroko Kobayashi
Yoshiki Tainaka
Kohei Suzuki
Satoko Yoda
Tatsuki Okubo
Tomonori Oshikawa
Hiroko Kobayashi
Yoshiki Tainaka
Kohei Suzuki
Application Number:
JP2022516837A
Publication Date:
May 23, 2023
Filing Date:
November 26, 2020
Export Citation:
Assignee:
SHIMADZU CORPORATION
International Classes:
H01J49/16; G01N27/62; H01J49/00; H01J49/40
Foreign References:
| US10074530 |
Attorney, Agent or Firm:
Patent Attorney Corporation Kyoto International Patent Office