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Study on the Determination of Trace Lead by

Study on the Determination of Trace Lead by Spectrophotometry after Flotation Separation with Ternary Association Complex System the quantitative separation of Pb 2+ from the above metal ions could be achieved. A new method of determination of trace lead by flotation

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Original Article PRECONCENTRATION, SOLVENT

flotation cell in the presence of a surfactant (HOL) created bubbles in the solution, which enhanced the floatability of the (TOA) 2[UO 2(Ar-III)] ion pair. A2.0 mL of 2.0 × 10 3mol L 1MIBK was added to the solution surface and the flotation cell was shaken upside down by hand for 5.0 min to ensure complete flotation

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SAINS MALAYSIANA ukm.my

Determination of thallium(I) by flotation-spectrophotometric method using iodide and Rhodamine B. Anal. Sci. 19 1505-1508. Lopez-Garcia, I., Martinez-Aviles, J. & Hernandez-Cordoba, M. 1986. Determination of palladium with thiocyanate and Rhodamine B by a

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Determination of Trace Amounts of Lead Using the Flotation

Determination of Trace Amounts of Lead Using the Flotation-spectrophotometric method. It is based on flotation of a complex of Pb 2+ ions and Alizarin yellow between aqueous and n-hexane interface at pH = 6. The proposed procedure is also applied for determination of lead in both tap water and prepared sea water samples. GFAAS, ICP-OES

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Homogeneous liquid-liquid microextraction via flotation

In the present study, homogeneous liquid-liquid microextraction via flotation assistance method is described for preconcentration of trace amounts of Mn(II). 1-(2-pyridylazo)-2-naphthol (PAN) is used as a ligand. The enriched analyte in the floated organic phase has been determined by inductively coupled plasma-mass spectrometry (ICP-MS).

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Enrichment techniques for inorganic trace analysis (Book

@article{osti_5698679, title = {Enrichment techniques for inorganic trace analysis}, author = {Mizuike, A}, abstractNote = {The author defines enrichment as a process in which the ratio of the amount of a desired trace element to that of the original matrix is increased. In this book enrichment techniques based on volatilization, liquid-liquid extraction, selective dissolution, precipitation

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NEW TYPE OF FLOTATION OF ION-ASSOCIATION

New type of flotation of ion-association compounds 853 it happens that solvents with less symmetrical molecules (e.g. toluene, xylene) are better flotation agents than the symmetrical benzene and carbontetrachioride (ref. 16). The necessary time of shaking of the aqueous phase with the flotation aol-.

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The Determination of Traces of Polyacrylamides in Water

The Determination of Traces of Polyacrylamides in Water. Warren B. Crummett Adsorption and electrokinetic studies in kaolinite/anionic polyacrylamide/chromate ions system, Colloids and Surfaces A Stanisław Chibowski, Surface interactions of polymer and surfactant molecules in relation to flotation properties of CaCo3

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Preconcentration Techniques For Trace Elements Zeev

Accurate determination of trace elements is critical in various fields of science and technology. Direct measurement of trace elements in samples with complex matrices is often impractical, either due to analytical sensitivity limitations or matrix interferences. Preconcentration procedures are generally needed to eliminate matrix interferences and/or enrich minute amounts of analytes to a

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Pereconcentration And Determination Of Cadmium And

Flotation procedures for trace of analytes in samples can be affected by the matrix constituents of the sample. Before the flotation for preconcentration of analyts ion in samples, the influence of some alkalin and earth alkalin ions on the recoveries of silver ion was investigated. The results are given in

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Preconcentration Techniques For Trace Elements Zeev

Accurate determination of trace elements is critical in various fields of science and technology. Direct measurement of trace elements in samples with complex matrices is often impractical, either due to analytical sensitivity limitations or matrix interferences. Preconcentration procedures are generally needed to eliminate matrix interferences and/or enrich minute amounts of analytes to a

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ELECTROTHERMAL ATOMIC ABSORPTION SPECTROMETRIC

absorbance of Ag, Cd, Cr, and Tl. Accordingly, a flotation separation method for investigated elements from the aqueous solution of aragonite obtained by dissolution the mineral in HCl and HNO3 was suggested. Key words Aragonite, trace elements, flotation separation, determination, AAS 1.

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Flotation-Spectrophotometric Determination of Mercury in

This paper describes a simple and highly selective method for separation, preconcentration and spectrophotometric determination of trace amounts of mercury. The method is based on the flotation of an ion-associate of HgI 4 2-and ferroin between aqueous and n-heptane interface at pH 5. The ion-associate was then separated and dissolved in

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Flotation Separation Scientific.Net

Journal of Biomimetics, Biomaterials and Biomedical Engineering Materials Science. Defect and Diffusion Forum

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Flotation-spectrophotometric determination of traces of

A simple, fast, reproducible and sensitive method for the flotation-spectrophotometric determination of Pb2+ is reported. The method is based on the ternary ion-association of Pb2+, xylenol orange (XO) and cetyltrimethylammonium bromide (CTAB) which is floated at interface of aqueous phase and n-hexane by shaking the separating funnel. By discarding the aqueous solution (the more dense phase

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Flotation-Spectrophotometric Determination of Trace

A simple, sensitive and reproducible flotation-spectrophotometric method for the determination of thorium is reported. The method is based on the ion-associate formation between thorium, xylenol

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Development of a flotation-spectrophotometric method for

INTRODUCTION. Flotation-spectrophotometry probably provides one of the most sensitive, relatively simple and fast approach to trace analysis. 1 Ion-association systems, in a more general way, could be said to result from the interaction of charged particles or complexes with oppositely charged ions. When a quaternary ammonium containing compound is used, the primary complex produced is cation

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Ion foam flotation of neodymium From speciation to

Ion foam flotation of neodymium (Nd3+) was studied using a pH-sensitive surfactant, the nonaoxyethylene oleylether carboxilic acid, which has the peculiarity of remaining water soluble in the presence of multivalent cations. The flotation efficiency factors were determined as a function of pH and for two different (surfactant/Nd) molar ratios, equimolar (1/1) or stoichiometric (3/1).

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Determination of trace elements in dolomite and gypsum by

The most suitable concentrations of dolomite and gypsum solutions for flotation are determined. To avoid flotation suppression due to the reaction of Ca 2+ and Mg 2+ with surfactant ions, a fit foaming agent was selected. The elements present in dolomite and gypsum as traces

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NEW TYPE OF FLOTATION OF ION-ASSOCIATION

New type of flotation of ion-association compounds 853 it happens that solvents with less symmetrical molecules (e.g. toluene, xylene) are better flotation agents than the symmetrical benzene and carbontetrachioride (ref. 16). The necessary time of shaking of the aqueous phase with the flotation aol-.

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A selective flotation-spectrophotometric method for the

Flotation spectrophotometry allows one to preconcentrate the trace elements in various materials. 924 Primary investigations showed that the none of two usual complexes of Ni and DMG could not float completely in interface of liquid and organic phase due to solubility in water and organic phase of Ni(Dm) 3 2-and Ni(HDm) 2, respectively. Thus

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Determination of Trace Cu (II) in Environmental Water

Abstract Ionic liquid solvent flotation was established for detecting trace Cu(II) in environmental water by graphite furnace atomic absorption spectrometry (GF-AAS), with the mixture of Ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate ([Bmim]PF 6) and ethyl acetate (EA) (11, V/V) as floating agent, tetracycline (TC) as trapping agent.It is a new method.

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Flotation-Spectrophotometric Method for the Determination

A simple, fast, reproducible and sensitive method for the flotation- spectrophotometric determination of Al 3+ is reported. The apparent molar absorptivity (ε) of the ion associate was determined to be 8.35×10 4 L mol1 cm1 . The calibration curve was linear in the concentration range of 1.0-50 ng mL >-1 of Al3+ with a correlation coefficient of 0.9997.

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Flotation spectrophotometric determination of La(III) as a

One determined lanthanum(III) utilising its reaction with alizarin and Rhodamine B in weakly alkaline medium. Flotation of the formed ternary ion associated complex was carried out with n-hexane from the solution of 0.01 mol L-1 ionic strength. After that the sample was dissolved in methanol and subjected to the subsequent spectrophotometric determinations.

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Performance of Sodium Mercaptobenzothiazole (NMBT

influences flotation. Control of pH is one of the most widely applied methods of modulation of mineral flotation. If possible, flotation is usually carried out under basic conditions because most collectors are stable at higher pH values. pH also determines the ratio of molecule to ion concentrations as well as the solubility of a collector [2].

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Flotation and Spectrophotometry Thorough Investigation

The proposed procedure has been applied to the determination of La and Y spiked in natural water samples and real ore samples. Additionally, the mechanism of flotation of the metal chelate was proposed to be due to a physical interaction between the metal chelate and the oleic acid surfactant through the van der Waal force.

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Development of a sensitive spectrophotometeric method for

ions, the complex of alizarin red S and boric acid is disso-ciated and new complex between alizarin red S and me-tal ions formed and metal solution get red. Determination of Cu (II) in aqueous solution u rs td i e p ovha m n H f determination Cu (II) by alizarin red S is pH 7.5. So we choose this pH using buffer solution in aliquots of solution

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Development of a sensitive spectrophotometeric method for

ions, the complex of alizarin red S and boric acid is disso-ciated and new complex between alizarin red S and me-tal ions formed and metal solution get red. Determination of Cu (II) in aqueous solution u rs td i e p ovha m n H f determination Cu (II) by alizarin red S is pH 7.5. So we choose this pH using buffer solution in aliquots of solution

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Preconcentration for Trace Element Determination in

Selective Flotation-Spectrophotometric Determination of Trace Copper(II) in Natural Waters, Human Blood and Drug Samples Using Phenanthraquinone Monophenylthiosemicarbazone.. CHEMICAL & PHARMACEUTICAL BULLETIN 2001, 49 (6), 664-668.

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Flotation-Spectrophotometric Determination of Ag(I) at the

A simple and cost effective method for separation and preconcentration of Ag(I) at the $10^{-7};mol;L^{-1}$ level in the environmental and mineral samples is present. The method is based on the flotation of Ag(I)-iodide complex as an ion-associate with ferroin in pH of 4 from a large volume of an aqueous solution (500 mL) using nheptane.

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