Quantitative determination of aluminium in zeolites by solid-state 27Al n.m.r. spectroscopy
Abstract
By an appropriate choice of experimental conditions (hydrated samples and very short r.f. pulses) considerable advances can be made towards quantitative determination of aluminium by 27Al n.m.r. spectroscopy in thermally treated (ultrastable) zeolite Y; quadrupole nutation 27Al n.m.r. spectroscopy reveals novel information about the various aluminous species present.