title: Determination of metal-ligand stoichiometries for inorganic complexes using total reflection X-ray fluorescence.
abstract: The methods usually used to determine the ratio metal-ligand in inorganic complexes require a set of solutions with different concentrations for both the ligand and metal. We propose a new method using the total reflection X-ray fluorescence technique, in which the ratio between metal and ligand is determined precisely, easily, and quickly. Experimental results provide evidence that for different chemical complexes, the ligand-metal ratio determined by this technique deviates at most from stoichiometric values by 6%. The technique is restricted usually to elements with Z above 14, and its detection limit is on the order of 10(-8) g/g.
authors.affiliation: Universidad Simón Bolívar, Sección de Física Nuclear, Apartado 89000, Caracas, Venezuela. egreaves@usb.ve
authors.forename: E D
authors.initials: ED
authors.lastname: Greaves
authors.forename: L
authors.initials: L
authors.lastname: Bennun
authors.forename: J
authors.initials: J
authors.lastname: Gomez
authors.forename: P
authors.initials: P
authors.lastname: Nemeth
authors.forename: L
authors.initials: L
authors.lastname: Sajo-Bohus