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Quadrupole

A set of two pairs of oppositely charged rods that are used in a mass spectrometer to filter out ions by focusing them in the center of the set of… 
National Institutes of Health

Papers overview

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Highly Cited
2007
Highly Cited
2007
Determination of several pesticides in water by solid-phase extraction, liquid chromatography and electrospray tandem mass spectrometry.
Highly Cited
2005
Highly Cited
2005
Quantitation and accurate mass analysis of pesticides in vegetables by LC/TOF-MS.
A quantitative method consisting of solvent extraction followed by liquid chromatography/time-of-flight mass spectrometry (LC/TOF… 
Highly Cited
2004
Highly Cited
2004
Confirmatory analysis for drugs of abuse in plasma and urine by high-performance liquid chromatography-tandem mass spectrometry with respect to criteria for compound identification.
Highly Cited
2002
Highly Cited
2002
A comparative study of commercial liquid chromatographic detectors for the analysis of underivatized amino acids.
Highly Cited
1993
Highly Cited
1993
Determination of an improved intermolecular global potential energy surface for Ar–H2O from vibration–rotation–tunneling spectroscopy
A new highly accurate and detailed intermolecular potential surface for Ar–H2O is derived by a direct nonlinear least squares fit… 
Highly Cited
1992
Highly Cited
1992
Are the electrospray mass spectra of proteins related to their aqueous solution chemistry?
Highly Cited
1989
Highly Cited
1989
Peptide and protein analysis by electrospray ionization-mass spectrometry and capillary electrophoresis-mass spectrometry.
Highly Cited
1984
Highly Cited
1984
BEAM OPTICS OF QUADRUPOLE PROBE-FORMING SYSTEMS.
This book presents the theory of quadrupole focusing with the practical development of microprobe systems in mind. The… 
Highly Cited
1978
Highly Cited
1978
Water binding and phase structures for different Acholeplasma laidlawii membrane lipids studied by deuteron nuclear magnetic resonance and x-ray diffraction.
Highly Cited
1973
Highly Cited
1973
Dipole and Quadrupole Phase Transitions in Spin-1 Models
A spin-1 Hamiltonian with arbitrary bilinear and biquadratic pair interactions has been studied in the molecular-field… 
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