Pure Appl. Chem., 1989, Vol. 61, No. 9, pp. 1619-1624
http://dx.doi.org/10.1351/pac198961091619
Silica gel-bound aza-crowns for the selective removal and concentration of metal ions
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Pure Appl. Chem., 1989, Vol. 61, No. 9, pp. 1619-1624
http://dx.doi.org/10.1351/pac198961091619