Contract notice: A plasma mass spectrometer inductively coupled (icp-ms) with removal systems
polyatomic interferences and introducing solid samples.
Water samples were analyzed by inductively coupled plasma mass spectrometry (ICP-MS) at the Trace Element Analysis (TEA) Core at Dartmouth using a quadrupole collision cell 7500c Octopole Reaction System (Agilent) and helium as a collision gas to remove
polyatomic interferences.
The upstream materials of polyurethane include three categories, namely, isocyanates (mainly MDI and TDI),
polyatomic alcohols (chiefly PPG, PTMEG, BDO and AA) and auxiliaries (principally DMF).
The analytical method used an octopol reaction system (ORS), operated in helium (collision mode) and hydrogen (reaction mode) for removal of
polyatomic interferences.
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.
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.
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.
Big inclination of VAC and a higher general level of the arc voltage (propane-butane or its mixture with air) in comparison with operation on argon are explained by significant consumption of power on dissociation and ionization of the
polyatomic gases.
This result is in accordance with literature data, which assess a minimum pyrrole/counter ion ratio of 3 for
polyatomic anions as dopants [2].
As a result, the iron concentration in the otoliths of fish is also very low that makes the determination of iron problematic by ICP-MS due to interferences of otolith matrix and spectral overlaps of
polyatomic ions on isotopes of iron.
