Correct determination of aluminium in Y zeolites by magic-angle spinning n.m.r. spectroscopy

Abstract
When Y zeolites are impregnated with ethanolic acetylacetone, the 29Si and 27Al magic-angle spinning n.m.r. spectra can be used to determine the correct Si/Al framework ratios and to quantify the amount of extra-framework aluminiums; evidence suggests that this impregnation does not cause further dealumination of the zeolitic material.

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