Simultaneous determination of molybdenum(VI) and tungsten(VI) and its application in elemental analysis of polyoxometalates

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Authors	LUBAL Přemysl KOPŘIVOVÁ Hana ŠEDO Ondrej HAVEL Josef LIS Stefan BUT Slawomir
Year of publication	2006
Type	Article in Periodical
Magazine / Source	Talanta
MU Faculty or unit	Faculty of Science
Citation
Field	Analytic chemistry
Keywords	Polyxometalates; simultaneous spectrophotometric determination; molybdenum(VI); tungsten(VI); ANN; MALDI-TOF MS.
Description	Spectrophotometric determination of molybdenum(VI) and tungsten(VI) with application of Artificial Neural Networks is proposed and it was applied for elemental analysis of solid polyoxometalates. Better results in comparison with previously those achieved by previous published method were demonstrated. MALDI-TOF Mass Spectrometry was tested for possible determination of molecular weight of polyoxometalates utilizing different matrices. Phenomena observed during desorption-ionisation processes are discussed. LDI-TOF MS was found to be suitable for the determination of Mo:W ratio in polyoxometalates as a rapid screening method to follow synthetic procedure.
Related projects:	Artificial neural networks and experimental design in analytical chemistry, especially in separation methods