Determination of metal-ligand stoichiometries for inorganic complexes using total reflection X-ray fluorescence.
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.
Greaves
E D
ED
Universidad Simón Bolívar, Sección de Física Nuclear, Apartado 89000, Caracas, Venezuela. egreaves@usb.ve
Bennun
L
L
Gomez
J
J
Nemeth
P
P
Sajo-Bohus
L
L