polyatomic ion

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polyatomic ion

[‚päl·ē·ə¦täm·ik ′ī·ən]
(chemistry)
An electrically charged species formed by covalent bonding of atoms of two or more different elements, usually nonmetals, for example, the ammonium ion (NH4+).
References in periodicals archive ?
The theory/model proposed herein remains a better fit to empirical findings for all polyatomic molecules.
The purpose was that it produces least polyatomic interferences in contrast with HClO4 andH2SO 5.
Polyatomic (molecular) interference--caused by the presence of ions consisting of more than one atom having a collective nominal mass-to-charge ratio the same as the element of interest.
Among the topics are theoretical insights into cluster secondary ion mass spectrometry (cluster SIMS), surface analysis of organic materials with polyatomic primary ion sources, three-dimensional imaging with cluster ion beams, and cluster SIMS for the depth profiling of semiconductors and metals.
11-18) Extension of such studies to atom + polyatom and diatom + diatom systems is critical for elucidating the multidimensional dynamics of polyatomic molecules.
Posey, 1994, "Partial Control of an Ion Molecule Reaction by Selection of the Internal Motion of the Polyatomic Reagention," Science, 266, 259-261.
USA), which was operating in helium cell mode to eliminate polyatomic interferences commonly associated with [sup.
The number of various degrees of freedom for polyatomic nonlinear molecules is calculated as 3n - 6.
Contributors describe their work in integral equation theories (including bridge functions and applications to classical fluids), the chemical environment of ionic liquids (including the links between liquid structure, dynamics and solvation), counter-ion condensation in nucleic acids, physiochemical applications of scanning electrochemical microscopy, certain shapes of centrosymmetric cyclic dimers involving weak hydrogen bonds, and time-resolved photoelectron spectroscopy of nonadiabatic dynamics in polyatomic molecules.
6 mL/min) was used as the collision gas for the octopole reaction mode to reduce isobaric and polyatomic interference.
The ORS eliminates polyatomic interferences arising from the plasma and sample matrix using a simple process: kinetic energy discrimination.