Synthese und Eigenschaften eines chelatbildenden Austauschers mit N,N′‐bis‐(2‐hydroxybenzyl)‐ethylendiamin als Ankergruppe auf der Basis von Polystyrol

Djamali, M. G.; Lieser, Κ. H.

doi:10.1002/apmc.1983.051130113

Cited by 9 publications

(1 citation statement)

References 9 publications

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“…The copolymer of styrene (in some cases chloromethylated []) with divinylbenzene is the most popular support for preparation of sorbents for Au, Pd, and Pt. It is functionalized with various reagents: 1,3,4‐Thiadiazole‐2‐amino‐5‐thiol [] Dipicolinic acid [] Polyhydroxamic acid [] 8‐hydroxyquinoline [] Guanidine derivatives [] N , N ′‐bis(2‐hydroxybenzyl)‐ethylenediamine [] Miscellaneous []. …”

Section: Sorbentsmentioning

confidence: 99%

Solid‐phase extraction in the determination of gold, palladium, and platinum

Mladenova

Karadjova²,

Tsalev³

2012

J of Separation Science

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A simple classification of various sorbents and solid-phase extraction procedures used for preconcentration of trace levels of Au, Pd, and Pt from different sample types is proposed in this review article. The large variety of available sorbents/procedures has been organized according to expected mechanisms of sorption process (complex formation; ion exchange; adsorption; ion-imprinted or molecularly imprinted polymers); according to the kind of monomeric units of the polymer matrix as well as on the basis of the kind of functional group responsible for main performance characteristics (selectivity, capacity) of the sorbent. Advantages of chemically modified sorbents, sulfur-containing sorbent extractants, and ion-imprinted polymers, together with rational pretreatment by means of microwave treatments, scaling down of enrichment, and quantification by means of flow and flow injection approaches are given. Preferred instrumental techniques for quantification of ppb levels of Au, Pd, and Pt in prepared concentrates/column eluates are multielement instrumental techniques: inductively coupled plasma optical emission spectrometry (ICP-OES), and inductively coupled plasma mass spectrometry (ICPMS). Excellent limits of detection at picogram levels of these analytes are provided by electrothermal atomic absorption spectrometry (ETAAS), generally in single-element mode and the neutron activation analysis (NAA), while X-ray fluorescence spectrometry and flame AAS are rarely applied because of lack of sensitivity at sub-ppm levels of Au, Pd, and Pt. Some problems of atomic spectrometric quantification techniques and their representative limits of detection are given. Recent applications to geological, industrial, pharmaceutical, biological, and other materials are tabulated. References have been selected mostly from the period 1995 to 2010.

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Section: Sorbentsmentioning

confidence: 99%

Solid‐phase extraction in the determination of gold, palladium, and platinum

Mladenova

Karadjova²,

Tsalev³

2012

J of Separation Science

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Darstellung und eigenschaften eines ionenaustauschers mit einem 1,3‐diketon als Ankergruppe auf der Basis von Polystyrol

Djamali

Lieser

1983

Angew. Makromol. Chem.

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ZUSAMMENFASSUNG:Aminopolystyrol wird mit Diketen zu einem Austauscher rnit einem 1,3-Diketon als Ankergruppe umgesetzt. Die Kapazitat fur Fe3+-Ionen betragt 3,2 mmol/g. Der Austausch erfolgt in einem raschen und einem langsamen Teilschritt . Die Verteilungskoeffizienten fur UO;+-, Cuz+-, Ni2+-und Fe3+-Ionen werden als Funktion des pH-Wertes angegeben. SUMMARY:Aminopolystyrene is reacted with diketene to an exchanger with 1,3-diketone as anchor group. The capactiy for Fe3+ ions is 3.2 mmol/g. The exchange comprises a fast and a slow step. The distribution coefficients for UO;+, Cu2+, NiZ+ and Fe3+ ions are presented as function of pH.

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Synthese verschiedener Oxincellulosen für spurenanalytische Anreicherungsverfahren

Csanády

Prakash

Müller

et al. 1989

Angew. Makromol. Chem.

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ZUSAMMENFASSUNG:Es werden mehrere SynthesemiSglichkeiten fur die Herstellung von an Cellulose immobilisierten 8-Hydroxychinolin-und 8-Hydroxychinolin-5-sulfonsaure-Derivaten beschrieben, die zu einem Produkt mit einer Kapazitat von 500-800 pmol/g, hoher Austauschgeschwindigkeit und guter Stabilitat gegenuber dem Eluenten fiihren. Die scheinbare Komplexbildungskonstante der Oxincellulosen mit Zn2+ ist etwa 2 * 1 O5 mol-' dm3. SUMMARY:Some routes to synthetize covalently bound chelating groups as 8-hydroxyquinoline or 8-hydroxyquinoline-5-sulfonic acid to cellulose are given. The products show a capacity of 500 -800 pmol/g, fast kinetics of exchange and good stability against the eluent. The apparent stability constant of the complexes with ZnZ+ are around 2 lo5 mol-' dm3.

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Synthese und Eigenschaften eines chelatbildenden Austauschers mit N,N′‐bis‐(2‐hydroxybenzyl)‐ethylendiamin als Ankergruppe auf der Basis von Polystyrol

Cited by 9 publications

References 9 publications

Solid‐phase extraction in the determination of gold, palladium, and platinum

Solid‐phase extraction in the determination of gold, palladium, and platinum

Darstellung und eigenschaften eines ionenaustauschers mit einem 1,3‐diketon als Ankergruppe auf der Basis von Polystyrol

Synthese verschiedener Oxincellulosen für spurenanalytische Anreicherungsverfahren

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