2,2′-Diaminodiethylamine cellulose powder for trace metal preconcentrations from water
Faculty of Sciences. Chemistry
Fresenius' Zeitschrift für analytische Chemie. - München, 1947 - 1989
, p. 520-526
University of Antwerp
Cellulose powder with 2,2′-diaminodiethylamine (DEN) functional groups exhibits efficient complexation of transition metal cations. Collection yields above 85 % are obtained up to a chelation capacity of 1.5 meq per gram. Since a good collection is obtained for a pH up from 5, no pH adjustments have to be made for natural water samples. The cellulose-DEN powder is insensitive to abundant substances like alkali and alkaline earth ions, and humic matter. Some cations can be eluted efficiently in a small volume of HNO3. Blank concentration levels from the cellulose-DEN powder are reported.