How Researchers Use Our Products
How Researchers Use Ardara
Explore the instrument challenge, the Ardara solution selected, and the performance reported by each research team.
Used by researchers
2009
Stanford University
Desorption Electrospray Ionization: Achieving Rapid Sampling Rates
- Solution used
- PSRF-100 radio-frequency power supply; two RF-only quadrupole ion guides
The Stanford team used an Ardara PSRF-100 supply to drive two RF-only quadrupole guides at 1.46 MHz in a rapid desorption electrospray ionization sampling system. The guides transported ions through a configuration designed to reduce carryover between sequential samples. The instrument resolved alternating analytes at up to 80 samples per second and a single analyte at 50 samples per second. This paper is an early public example of an Ardara RF supply supporting high-speed ambient ionization and automated sample throughput.
Published by Barbula et al. in Analytical Chemistry (2009).
Used by researchers
2009
Iowa State University
An Ion Trap-Ion Mobility-Time of Flight Mass Spectrometer with Three Ion Sources for Ion/Ion Reactions
- Solution used
- PSRF-100 radio-frequency power supply; ion funnel
An Ardara PSRF-100 supplied approximately 90 Vpp at 360 kHz to the instrument's ion funnel. The funnel coupled three ion sources to a hybrid ion trap-ion mobility-time of flight platform used for ion/ion reaction studies. The authors reported that the funnel increased total ion signal by roughly sevenfold. Ardara's role was therefore central to ion transmission and sensitivity rather than to a peripheral accessory. The paper also acknowledged Randy Pedder for technical advice, but it did not include an Ardara-affiliated coauthor and is classified here as an independent use.
Published by Zhao et al. in Journal of the American Society for Mass Spectrometry (2009).
Used by researchers
2012
University of California, Berkeley and Lawrence Berkeley National Laboratory
Slow Photoelectron Velocity-Map Imaging Spectroscopy of Cold Negative Ions
- Solution used
- Multiple radio-frequency supplies for hexapole, quadrupole, and octupole ion optics
The cryogenic photoelectron imaging instrument used Ardara RF supplies at several stages: a hexapole guide operated near 3 MHz and 200 Vpp, a quadrupole stage near 1.15 MHz, and an octupole trap with RF amplitudes up to 500 Vpp. These stages guided and trapped cold negative ions before velocity-map imaging. The completed system produced ion temperatures of 10 +/- 2 K and spectral peak widths as narrow as 4 inverse centimeters. This is a strong example of Ardara supplies coordinating multiple ion-optical elements in a precision spectroscopy instrument.
Published by Hock et al. in Review of Scientific Instruments (2012).
Used by researchers
2015
National High Magnetic Field Laboratory and Florida State University
21 Tesla Fourier Transform Ion Cyclotron Resonance Mass Spectrometer: A National Resource for Ultrahigh Resolution Mass Analysis
- Solution used
- Tuned tank circuits for five injection quadrupoles
Five ion-injection quadrupoles in the 21 T FT-ICR platform were driven through Ardara-tuned tank circuits operating from approximately 2.7 to 3.9 MHz and up to 400 Vpp. The resulting national user instrument delivered more than two million resolving power for bovine serum albumin, mass accuracy below 150 parts per billion, and 68 percent sequence coverage for carbonic anhydrase using combined dissociation methods. Ardara hardware supported the demanding ion-transfer path of a flagship ultrahigh-resolution mass spectrometer.
Published by Hendrickson et al. in Journal of the American Society for Mass Spectrometry (2015).
Used by researchers
2017
University of California, Berkeley
Mass, Mobility and MSn Measurements of Single Ions Using Charge Detection Mass Spectrometry
- Solution used
- Two RF-only quadrupole ion guides; energy-selective electrostatic turning quadrupole
The Berkeley charge-detection mass spectrometer incorporated a pair of Ardara RF-only quadrupole guides and an energy-selective electrostatic turning quadrupole. Together, these elements enabled repeated manipulation and measurement of individual highly charged ions. The authors demonstrated MS7 analysis of a single multiply charged, approximately 8 MDa polyethylene glycol ion and reported about one percent energy precision. The work illustrates how Ardara ion optics can support single-particle experiments that require controlled recirculation, selection, and low-loss transport.
Published by Elliott et al. in Analyst (2017).
Used by researchers
2018
University of Florida
Operation and Performance of a Mass-Selective Cryogenic Linear Ion Trap
- Solution used
- Quadrupole mass filter upstream of a cryogenic linear ion trap
An Ardara quadrupole mass filter provided initial mass selection before ions entered a cryogenic linear ion trap. The platform produced reproducible spectra from 17 to 295 K and used stored-waveform inverse Fourier transform isolation to select fragile, nitrogen-tagged ions for background-free infrared spectroscopy. This use case connects Ardara mass-selection hardware with low-temperature ion chemistry and action spectroscopy, where clean precursor selection and stable transmission directly affect spectral quality.
Published by Tesler et al. in Journal of the American Society for Mass Spectrometry (2018).
Used by researchers
2021
Korea Advanced Institute of Science and Technology
Observation of the Ponderomotive Effect in Non-Valence Bound States of Polyatomic Molecular Anions
- Solution used
- RF generators for hexapole and octopole ion guides
Ardara RF generators powered the hexapole and octopole guides used to transport and prepare molecular anions for photodetachment spectroscopy. The authors reported the first experimental demonstration of the ponderomotive effect in non-valence-bound states of polyatomic molecular anions. The case is notable because the Ardara RF hardware supported a fundamental molecular-physics measurement in which stable ion guidance and well-controlled fields were prerequisites for observing a subtle light-matter interaction.
Published by Kang et al. in Nature Communications (2021).
Used by researchers
2023
Korea Advanced Institute of Science and Technology
Excited-State Chemistry of the Nitromethane Anion Mediated by the Dipole-Bound States Revealed by Photofragment Action Spectroscopy
- Solution used
- Radio-frequency quadrupole mass filter for initial mass selection
The experiment used an Ardara RF quadrupole mass filter to isolate nitromethane anions before transfer into a 25 K ion trap for photofragment action spectroscopy. The authors reported the first experimental observation of an excited dipole-bound state of the nitromethane anion and mapped its role in the excited-state reaction pathway. The Ardara filter provided the clean precursor population needed to assign weak, state-specific photochemical features with confidence.
Published by An et al. in Chemical Science (2023).