Sample preconcentration and extraction
Preconcentration of Cadmium in Environmental Samples by Cloud Point Extraction and Determination by FAAS
... The sample was first prepared in accordance with the instructions on the analysis certificate, after which an accurately weighed amount (50 mg) was sub- jected to microwave ...the sample was diluted to 25 ...
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Preconcentration and frontal electroelution of amino acids for in line solid phase extraction–capillary electrophoresis
... Sample of 0.1 mM of Ala and Trp in water acidified with HCl. All other condi- tions as in Fig. 2. 3.3. Optimisation of the strong electrolyte composition The strong electrolyte must be able to elute the analytes ...
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A New Thioamide Derivative for Separation and Preconcentration of Multi Elements in Aquatic Environment by Cloud Point Extraction
... Triton X-114 and, at the same time, the volume obtained is rather small (0.5 mL), absolute methanol/conc. HNO 3 mixture (5:1) was added to the surfactant rich phase after phase separation. Moreover, it was necessary to ...
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In-Syringe micro solid-phase extraction method for the separation and preconcentration of parabens in environmental water samples
... synthetic sample solution (100 µg L −1 ) was passed through the device packed with adsorbent and then discharged from syringe cartridge though pushing the ...the sample solution in MSPE device was about 1 ...
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Application of modified sawdust for solid phase extraction, preconcentration and determination of trace lead in water samples
... phase extraction method. Assessment of optimum pH value for preconcentration and extraction of lead ions in water samples was investigated in the present ...the sample solutions with different ...
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A solid-phase extraction method using Transcarpathian clinoptilolite for preconcentration of trace amounts of terbium in water samples
... the other sorbents. For example, these natural alumino- silicate minerals contain pores and cavities with strictly defined size and shape, and it provides very effective concentration and separation of organic and ...
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Room temperature cloud point extraction: An application to preconcentration and spectrophotometric determination of copper(II) - Short communication
... The relative standard deviations (RSD, %) and recoveries (R, %) were in the range 3.1–4.9 % and 98.5–106.7 %, respectively. The effect of some interfering ions on the spectrophotometric determination of Cu(II) after its ...
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Preconcentration of Lead in Sugar Samples by Solid Phase Extraction and Its Determination by Flame Atomic Absorption Spectrometry
... (ET) sample introduction yield slightly better detection limits, this method offers advantages such as simplicity, low cost as well as ease of operation in comparison with those mentioned ...and sample ...
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Determination of Some Polycyclic Aromatic Hydrocarbons in the Caspian Seawater by HPLC Following Preconcentration with Solid-Phase Extraction
... Before sample preconcentration, the cartridge was cleaned with 5 ml n-hexane and subsequently conditioned with 5 ml methanol and 10 ml ...the sample through the cartridge was controlled at 5 ml/min ...
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Extraction-preconcentration Mercury ion by Ghezeljeh montmorillonite nanoclay as a new native adsorbent from food and water samples
... After the parameters involved in the adsorption and desorption steps of mercury ions were optimized, the method used in this research was separately applied to a variety of natural water samples: Caspian Sea, Iran, Karun ...
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Extraction, preconcentration and spectrometric determination of Al (III) and Cr (III) ions using modified MnFe2O4 nanoparticles as an efficient adsorbent
... of sample volume The possibility of using higher sample volumes causes enriching low concentrations of metal ions and obtaining higher preconcentration ...applicable sample volume must be ...
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Reversed-phase Salt Assisted Liquid-liquid Extraction: A New Technique for Preconcentration and Determination of Crocin in Herbal Medicines by HPLC
... liquid-liquid extraction (RP-SALLE) method was developed for the preconcentration and determination of trace crocin in herbal medicines by high-performance liquid chromatography ...powdered sample ...
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Mucor pusillus immobilized Amberlite XAD-4 biocomposites for preconcentration of heavy metal ions by solid-phase extraction method
... of sample solution, the effect of change in the volume of sample solution passed through the col- umn on the retention of analytes was investigated; 50, 100, 250, 500, 750, and 1000 mL of sample ...
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An Innovative Nanosorbent Based on ZnO@Ag2O@Fe3O4 Nanocomposite- for Extraction and Preconcentration of Cd(II) Ions from Water Samples
... in sample preparation process which have some advantages including low cost, environmental abundance, ease of preparation in various shapes and sizes, monotonous surface morphology, environmental friendliness, ...
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Applications of chemically modified ordered mesoporous carbon as solid phase extraction sorbent for preconcentration of trace lead ion in water samples
... The X-ray powder diffraction patterns were re- corded on a Philips 1830 diffractometer using CuK α radiation. The diffractograms were recorded in the 2θ range of 0.8–10 with a 2 θ step size of 0.010 and a step time of 1 ...
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Cloud Point Extraction for the Separation, Preconcentration and Spectrophotometric Determination of Trace Copper (II) In Herbal Plants Samples Using New Synthesized Reagent
... Therefore, the Triton X-114 used (3.0) %concentration reports. The surfactant is very viscous; therefore the ethanol was added after CPE to make it easy transferring in spectrophotometric cell, while ethanol (1.0) mL is ...
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Salicylic acid functionalized silica-coated magnetite nanoparticles for solid phase extraction and preconcentration of some heavy metal ions from various real samples
... high preconcentration factor by using sam- ple solutions with large ...applicable sample volume was determined by increasing the dilution of metal ion solution, while keep- ing the total amount of loaded ...
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Improved Extraction Chromatographic Materials for the Separation and Preconcentration of Metal Ions
... efficiency, is one consisting of uniform, small-particle size supports bearing a thin, homogeneous layer of a non-viscous extractant capable of rapid reaction with the metal ion(s) of interest. Few, if any, EXC ...
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Selective Cloud Point Extraction and Preconcentration of Copper by the Use of Dithizone as a Complexing Agent
... ABSTRACT:The aim of this work was to develop a selective cloud point extraction method for the separation and preconcentration of copper(II) prior to spectrophotometric determination. For this purpose ...
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Cloud Point Extraction and Preconcentration Procedures for Organic and Related Pollutants of State Concern
... Concentration of Hydrophobic Organic Compounds and Extraction of Protein using Alkylamrnoniosulfate Zwitterionic Surfactant Mediated Phase Separations (Cloud Point Extractions).. Marce[r] ...
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