A method based on the linear model of sorption dynamics (LMSD) is applied for the comparison of several solid phase extraction systems used for preconcentration of phenol from water solutions. The method includes the calculation of maximum concentration efficiency for the given values of preconcentration factor and recovery under scope of the model. Original parameters of LMSD were obtained fro...

In pursuit for new reactive materials designed for synthesis of functional resins, the novel core-shell type polymeric supports with accessible chloromethyl groups were synthesized. The commercial Amberlite XAD-4 adsorbent was impregnated with different mixtures of vinylbenzylchloride and divinylbenzene, that were further polymerized in the structure of the polymer carrier. The syntheses have b...

The author synthesized a Green reagent N, N1-bis (4-dimethyl amino benzyl) ethylene diamine for the analysis of heavy metals namely Fe, Cd, Cr, Cu and Co by FAAS using Amberlite-XAD-16 in various environmental samples. The results shows good recovery compared with the results obtained with Cytosine. Effects of pH, reagent concentration, flowrate, volume of sample etc were studied.

In the present paper, a solid phase extraction system for separation and preconcentration of nickel (ng g(-1)) in saline matrices is proposed. It is based on the adsorption of nickel(II) ions onto an Amberlite XAD-2 resin loaded with 1-(2-pyridylazo)-2-naphthol (PAN) reagent. Parameters such as the pH effect on the nickel extraction, the effect of flow rate and sample volume on the extraction, ...

Abstract The adsorption efficiency of Pb(II) and Cd(II) from aqueous solutions on m-phenylenediamine-modified Amberlite XAD-4 resin was investigated. effects pH, adsorbent amount, initial metal concentration, eluent type volume flow rate the retention ions have been studied column studies. optimum parameters were determined as pH 5, concentration 10 mg/L, stirring time 30 min 0.2 g amount 2.5 m...

Three patients with cholinesterase inhibitor poisoning have been presented. The patients were in a deep coma and, in one of them, artificial mechanical respiration was instituted. All three cases were treated by a procedure combining hemodialysis and hemoperfusion with Amberlite resin (XAD-4), and the clinical picture improved over a short period of time. After the end of procedure, the platele...

Probestin has been isolated as part of a program designed to find microorganism-produced inhibitors of aminopeptidase M from Streptomyces azureus MH663-2F6. It was purified by use of column chromatography of Amberlite XAD-4, silica gel, YMC-gel, Toyopearl HW-40, YMC D-ODS-5 (HPLC) and then isolated as colorless powders. Probestin is competitive with the substrate, and the inhibition constant (K...

The transformation of 22-hydroxy-23,24-bisnorchol-4-en-3-one to 7a-22-dihydroxy-23,24-bisnorchol-4-en3-one by Botryodiploida theobromae, Lasiodiplodia theobromae, and various Botryosphaeria strains is described. Factors affecting the reaction were incubation temperature, sonication of the substrate, and addition of 2,2'-dipyridyl, extra carbohydrate, and Amberlite XAD-7. The enzyme responsible ...

Norisoprenoids appear as promising compounds for authenticating unifloral honeys. So far, however, no method has been optimized for their isolation from a matrix so rich in sugars. In this framework, an original extraction procedure based on the use of Amberlite XAD-16 was developed. Recovery factors were determined and compared with those obtained with another resin (XAD-2). This was done for ...