Figure 1. IR of I) NO2-XAD-4 resin II) NH2-XAD-4 resin III) octa-O-methoxy resorcin[4]arene Amberlite XAD-4 chelating resin

From

Solid Phase Extraction, Preconcentration and Sequential Separation of U(VI), Th(IV), La(III) and Ce(III) by Octa-O-methoxy resorcin[4]arene based Amberlite XAD-4 Chelating Resin

Keyur D. Bhatt, Disha J. Vyas, Hrishikesh S. Gupte, Bharat A. Makwana, Savan M. Darjee, Vinod K Jain

World Journal of Analytical Chemistry. 2014, 2(2), 31-41 doi:10.12691/wjac-2-2-3