1,721,005 research outputs found
Concentration and determinationof polycyclic aromatic hydrocarbons in aqueous samples on graphitized carbon black
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Preparation and characterization of a polymer-modified mercury film electrode for selenium (IV)
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Extraction of organic compounds from water by means of modified perlite-active charcoal mixture
No full textApplications of ligand-exchange-III. Preparation and properties of phenol-formaldeyde-based resin in the iron (III) form
No full textA number of resins containing ethylenediamine acetic acid groups have been prepared, and these intermediates (resin-EDTA) converted into the iron(III) form. The capacities of these exchangers in the formation of iron(III)-phenol complexes have been studied and compared with those of the Chelex-iron(III) resin. The character of the exchanger matrix is very important in connection with the retention of phenols and with the elution order. The modified Amberlite CG 4B in the iron(III) form can be used for the quantitative separation of phenolic compounds, a separation that is not possible with the Chelex-iron(III) resi
Determination of organophosphorus pesticides by thin layer chromatography
No full textAnalysis for 13 common organophosphorus pesticides by thin-layer chromatography is described; 17 solvent systems were examined. With channel thin-layer chromatography, linear calibration graphs were obtained for the range 1-10 μg
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