Synthese verschiedener Oxincellulosen für spurenanalytische Anreicherungsverfahren

Csanády, Georg; Prakash, Narayanan; Müller, Kurt; Wegscheider, Wolfhard; Knapp, Günter

doi:10.1002/apmc.1989.051700112

Cited by 15 publications

(5 citation statements)

References 26 publications

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“…The 2,3-dialdehyde cellulose was synthesized from Whatman cellulose powder reacting with NaIO 4 (7). Five grams of 2,3-dialdehyde cellulose was reacted with 0.5 M hydroxylamine hydrochloride solution (100 ml) at pH 4, and the liberated acid was neutralized with 0.5 M NaOH solution using bromophenol blue indicator to complete the condensation reaction.…”

Section: Methodsmentioning

confidence: 99%

Graphite Furnace Atomic Absorption Spectrometry Determination and On-line Preconcentration of Palladium

Lévai

Lásztity

Zih-Perényi

et al. 1998

Microchemical Journal

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Section: Methodsmentioning

confidence: 99%

Graphite Furnace Atomic Absorption Spectrometry Determination and On-line Preconcentration of Palladium

Lévai

Lásztity

Zih-Perényi

et al. 1998

Microchemical Journal

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“…The synthesis and its characterization have been reported earlier [13]. Double distilled water, the buffer and calcium containing solutions were purified for extractable metals by passing them through a column containing the chelating ion-exchanger.…”

Section: Reagentsmentioning

confidence: 99%

Automatic off/on-line preconcentration for ICP-OES: Powerful instrumentation for water analysis

et al. 1989

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Automated preconcentration techniques for off/on-line determination with ICP-OES have been developed for various metal ions of environmental interest. Preconcentration studies were performed on two different types of chemically bonded chelating ion-exchangers, namely EDTrA-cellulose (iminoacetate groups) and HSO 3 9 oxine-cellulose. Enrichment studies were carried out at various preconcentration factors and also at different loadings.Inductively coupled plasma emission spectroscopy has been widely used in determination of trace elements in environmental samples. Although the method is very sensitive, it sometimes poses problems on direct determination at detection limits and also in presence of large amounts of interfering matrix constituents. Preconcentration techniques combined with ICP-OES either off-[1, 2] or on-line [-3, 4], are found to be useful in solving these complex analytical problems. These methods provide high enrichment factors and lower detection limits by selective extraction of metals of interest from the complex matrix. As the sample throughput with ICP-OES is fairly high for multi-element analysis, it therefore demands faster sample preparation procedures. Hence the need of an automated preconcentration apparatus is justified. It not only helps in reducing the time, but also the closed system for sample handling makes it contamination-free. Additionally, on coupling it directly to a simultaneous ICP-AE [3,4] or flame AA [-5, 6] spectrometer and integrating the transient elution peak, detection limits can be lowered by an order of magnitude. Also these on-line methods require lesser volumes for enrichment as compared to manual off-line ones.

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“…The 8-hydroxyquinoline is one of the most versatile extractants in synergic solvent extraction and separation techniques on account of its selectivity, sensitivity and excellent chelating capacity [5]. 8-hydroxyquinolines have destinations in charge of the complexation of the metal particles through the development of a chelate ring in the fundamental nitrogen and phenolic gathering, and have been immobilized synthetically on backings, for example, Amberlite XAD-arrangement pitches [6,7], cellulose [8][9][10][11][12] and silica gel [13][14][15] for the partition and centralization of follow metals from the ocean and lake tests.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Chromone Functionalized Chitosan Polymer: Application/Screening of Its Physical Parameters

Gaidhane

Ghatole²,

Lanjewar³

2020

Polym. Sci. Ser. B

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Chitosan is naturally occurring, biodegradable, non-toxic, non-allergenic biopolysaccharide derived from chitin which turns viscous upon dissolution in mildly acidic medium. Artificially changed chitosan consolidating hydroxyl chromone was set up by responding 6-Hydroxy-4-oxo-4H-chromone-3-carbaldehyde with chitosan; it was found to have high specific and chelating proficiency towards transition metal ion at pH 1-8. Enhanced adsorption capacity and a strong affinity for Cu 2+ was observed as compared to Cd 2+ , Ni 2+ and Co 2+ at pH 4-6. Chitosan-hydroxyl-chromone was chemically synthesized and characterized by spectroscopic techniques. Potentiometric strategies affirmed the request of selectivity which was free of the physical form of chitosan-hydroxyl-chromone subsidiary. 1 H NMR outcomes recommended a level of substitution (DS) extending from 32.72 to 98.21%. Antimicrobial and antioxidant activity of chitosanhydroxyl-chromone within the series of synthesized compounds was evaluated. To improve the solubility of chitosan in water, we present a synthesis of chitosan-based chromone biopolymers and its applications in metal extractions.

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Synthese verschiedener Oxincellulosen für spurenanalytische Anreicherungsverfahren

Cited by 15 publications

References 26 publications

Graphite Furnace Atomic Absorption Spectrometry Determination and On-line Preconcentration of Palladium

Graphite Furnace Atomic Absorption Spectrometry Determination and On-line Preconcentration of Palladium

Automatic off/on-line preconcentration for ICP-OES: Powerful instrumentation for water analysis

Synthesis of Chromone Functionalized Chitosan Polymer: Application/Screening of Its Physical Parameters

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