Patent · US Expired

Method for improved mass resolution with a TOF-LD source

US5641959A · kind A · utility

50Cited by

5References

8Claims

0Family size

Assignee

Bruker-Franzen Analytik GmbH · DE

Inventors

Armin Holle · Oyten, DE
Claus Koster · Lilienthal, DE
Jochen Franzen · Bremen, DE

Key dates

Filing date	Mar 21, 1996
Grant date	Jun 24, 1997
Priority date	—
Expiry date	Mar 21, 2016

Classification

Technology area (CPC H)Electricity
CPC primaryH01J49/403
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The invention relates to the use of a time-of-flight mass spectrometer to analyze substance molecules which are ionized by laser desorption, particularly by matrix-assisted laser desorption (MALDI). In detail it relates to the process for improving mass resolution by the known method of delayed acceleration of the ions in the space in front of the sample support plate. The invention consists of switching the potential of an intermediate electrode which is located at a short distance in front of the sample support plate, instead of switching the potential of the sample support plate itself.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.