Synthesen von Celluloseaustauschern mit chelatbildenden Gruppen II

Abstract

Die Synthese von chelatbildenden Austauschern, die o′‐disubstituierte Diazogruppen enthalten, wird beschrieben. Die Verbindungen werden gewonnen durch Kupplung von Diazoniumcellulose mit 2‐Naphthol, 2‐Naphthylamin bzw. 2‐Naphthylanubderuvaten.

Preparation of Chemically Modified Cellulose Exchangers and their use for the Preconcentration of Trace Elements

“…To arrive at samples that can be measured by a technique sensitive to the geometry of the sample, e.g., X-ray fluorescence analysis, special efforts have to be made. Lieser chose to sandwich 50 mg of cellulose exchanger between two sheets of Whatman® filter• paper which reduced the sensitivity as compared to a filter 106 consisting of exchange material only and gave relative SDs of 18 to 23%. All of these problems must lead to completely unreliable results for all but the very purest aqueous solutions containing nothing but a few ppb of trace metals; even then, precision remains a problem.…”

“…Using the same reaction principles, 106 2-naphthol, 2-naphthylamine, and 2-naphthylamine,-N,Ndiacetic acid were immobilized on o-aminophenol cellulose, giving materials with 0.95, 0.45, and 0.30 mmol reagent per gram of cellulose, respectively. Since the diazonium material which was used as reactant has also 0.95 mmol/g, 100% yield is found for the coupling of 2-naphthol.…”