Abtrennung von Spurenelementen an einem Celluloseaustauscher mit 1-(2-Hydroxyphenylazo)-2-naphthol (Hyphan) als funktioneller Gruppe und nachfolgende Bestimmung durch R�ntgenfluorescenzanalyse

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

“…Extensive analytical studies were made of these chelating celluloses by the original authors. 109 "" 4 The Hyphan cellulose had high formation constants for transition metal ions. The dependence of the distribution constants from pH was determined for a good many ions ( Figure 5).…”

“…The recovery was between 90 and 99% and up to 58 of water could be fed through the column (20 g Hyphan cellulose) in less than 6 hr. 109 For the separation of uranium from high-salinity waters, the flow rate could be increased to 25 to 30 me/min (8 to 10m2/min cm 2 ). 110 This reduced the time needed for the analysis of 5 2 of water to 3 to 4 hr.…”

“…Of this cellulose exchanger, 100 mg were suspended in 100-m2 sample solutions and the trace ions could be collected by stirring at pH 7.5 for 1 hr. 109 '" 3 After filtration the fibers were analyzed by X-ray fluorescence spectrometry for Fe 3+ , Cu 2+ , Zn 2+ , Pb 2+ , and UO 2+ . This simple procedure gives good results between 0.2 and 20 ppm, even in presence of 0.5 mol/2.…”

X-ray fluorescence spectrometric determination of sulfur-containing anionic surfactants in water after their enrichment on a membrane filter as an ion-pair complex with a cationic surfactant

“…It has been applied to the determination of trace metals in water after collection of them on a membrane filter as neutral chelates. [11][12][13][14] In the present study, anionic surfactants containing sulfur in their structure were retained on a membrane filter as an ion pair with a cationic surfactant, and the sulfur on the membrane filter was determined by XRF. This method is very simple and rapid, although the apparatus is not as common as a spectrophotometer.…”

Dynamic adsorption and desorption of heavy metal ions on poly(acrylaminophosphonic-carboxyl-hydrazide) chelating fiber

“…The large surface area and high kinetic properties of these sorbents and the possibility of using them in different sorption modes, such as filters and films, make them useful to determine the concentrations of various microelements [9][10][11]. The chelating cellulose sorbents have recently been reported [12][13][14][15][16][17].…”