Characterization of isopoly tungstate using time-of-flight electrospray mass spectrometry.
Electrospray time-of-flight (TOF) mass spectrometry has been carried out on aqueous solutions of isopoly tungstate. A number of factors affecting the speciation of tungstate were studied, including concentration, and pH. The concentrations of the solutions ranged from 10(-2) to 10(-5) M. At all concentrations studied, the pH range was sufficient to investigate all major species expected to be in aqueous solution. In all cases, the results obtained by electrospray showed changes in speciation which were limited to protonation and solvation effects; the tungstate core remained intact.
Truebenbach
C S
CS
Department of Chemistry, Vanderbilt University, Nashville, TN 37235, USA.
Hercules
D M
DM
Houalla
M
M