Patent · US Expired

Method and device for the introduction of ions into quadrupole ion traps

US5739530A · kind A · utility

33Cited by

6References

17Claims

0Family size

Assignee

Bruker-Franzen Analytik GmbH · DE

Inventors

Jochen Franzen · Bremen, DE
Reemt-Holger Gabling · Stuhr, DE
Yang Wang · Suzhou, CN

Key dates

Filing date	May 31, 1996
Grant date	Apr 14, 1998
Priority date	—
Expiry date	May 31, 2016

Classification

Technology area (CPC H)Electricity
CPC primaryH01J49/4295
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The invention relates to methods and devices for the effective introduction of ions, which are stored in an RF ion guide into a quadrupole ion trap. The invention consists of arranging a switchable ion lens between the RF ion guide and the quadrupole ion trap, and introducing the ions into the quadrupole ion trap by a suitable connection of the ion lens only during the filling period, while otherwise the ions are reflected back into the RF ion guide. The filling period can be divided up and limited to the capture intervals of the quadrupole ion trap during each RF period. Measurement of the filling rate can be made by switching open the ion lens longer then the admission interval of the quadrupole ion trap, and measuring the flow of the ions passing through on the detector.

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