Planar geometry for trapping and separating ions and charged particles

S. Pau, W. B. Whitten, J. M. Ramsey

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


A planar quadrupole ion trap is proposed. We have demonstrated an extremely large operating range by trapping ions and particles with mass-to-charge ratio rangingfrom 102 to 109 at frequencies from 2.8 × 106 to 60 Hz at an operating pressure of 1.1 × 10-4 to 760 Torr, respectively, using a trap radius of r1 = 1 mm. We have also performed mass spectrometry with a resolution of 1.2 amu with mass-to-charge range from 50 to 150. Our geometry is simple enough to be integrated into existing integrated circuits and microelectromechanical system devices, opening up the possibility of many novel hybrid applications and experiments.

Original languageEnglish (US)
Pages (from-to)6857-6861
Number of pages5
JournalAnalytical Chemistry
Issue number17
StatePublished - Sep 1 2007

ASJC Scopus subject areas

  • Analytical Chemistry


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