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flotation spectrophotometric

Flotation-spectrophotometric determination of trace

1997-6-1  A flotation spectrophotometric method for the determination of germanium with isochromatic dye ion-pairs is described. The molar ratio of germanium to rhodamine 6G to tetrabromofluorescein is 1:5:5. The apparent molar absorptivity is 5.8 × 10 5 l mol −1 cm −1 at 531 nm.

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Flotation–Spectrophotometric Method for Separation and ...

2020-10-5  Flotation–spectrophotometry of such colored ternary complexes probably provides the most sensitive, relatively simple and fast approach to trace metal analysis [2]. It should be mentioned that the term “flotation-spectrophotometric” is based on the fact that some ion associations are not soluble in polar

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Flotation-Spectrophotometric Method for the

2019-7-31  Flotation-Spectrophotometric Method for the Determination 1530 Quantitative results A calibration graph for the determination of Al 3+ was constructed under optimum experimental conditions described above. Beer’s law was obeyed over the concentration range of 1.0-50 ng ...

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Flotation—spectrophotometric determination of

2001-1-1  A sensitive flotation—spectrophotometric method, based on the ion associate formed by the anionic thiocyanate complex of osmium with the basic dye methylene blue (MB) is described. The ion associate precipitates when the aqueous solution is shaken with toluene, and the separated and washed compound is dissolved in acetone.

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Flotation Spectrophotometric Determination of

2008-2-27  Flotation of the complex was carried out with heptane, followed by dissolution in N, N-dimethylformamide (DMF) for subsequent spectrophotometric determination. The molar absorptivity was 2.92×10 5 mol − cm − at 518 run. Beer's law was obeyed in the range 5–80 μg/1 and the detection limit was 0.4μg/l. The reliability of the procedure was confirmed ...

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Flotation-spectrophotometric determination of

1981-12-1  A sensitive flotation-spectrophotometric method for the determination of osmium, based on the ion associate formed by the anionic thiocyanate osmium complex with oxazine basic dye, Capri blue (CB), has been developed.

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Flotation-spectrophotometric determination of

The ion associate is floated with benzene and dissolved in acetone, and its molar absorptivity is found to be 1.7 × 10 5 l mol –1 cm –1 at 660 nm. The formation of the ion associate takes place over a wide pH range (1–6). The method is selective; interfering metals

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Ion flotation—spectrophotometric determination of

1981-8-1  Analytica ChimicaActa, 129 (1981) 237 241 Eisevier Scientific Publishing Company, Amsterdam Printed in The Netherlands Short Communication ION FLOTATION SPECTROPHOTOMETRIC DETERMINATION OF TRACES OF CHROMIUM(VI) MAMORU AOYAMA , TOSHIYUKI HOBO and SHIGETAKA SUZUKI Department of Industrial Chemistry, Faculty of

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Sensitive flotation-spectrophotometric determination

The method has been applied to the determination of osmium in mixtures of platinum metals. When xylene is used as flotation agent, osmium separates at a different acidity (pH 1.3–5), as a simple ion-association complex \([(R6G^ + )_2 (OsCl_6 ^{2 - } )]\). The spectrophotometric method involving xylene is less sensitive (by a factor of about 2).

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A sensitive and simple flotation-spectrophotometric

2008-5-3  A simple and sensitive spectrophotometric procedure for the determination of microgram amounts of silver has been developed. The method is based on the flotation of the complex of Schiff base, 2-[(2-mercaptophenylimino)methyl]phenol (MPMP), and

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Flotation-spectrophotometric method for the

This paper describes a sensitive spectrophotometric method for the determination of mercury, based on the flotation of a mercury iodide-brilliant green complex with cyclohexane at pH 5 and dissolution of the complex in acetone. The absorbance of the complex is measured at 625 nm. Beer's law is obeyed from 4–500 μg/l of mercury. The method is highly sensitive (ɛ = 5.96 × 105 1 mol−1 cm ...

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Flotation-Spectrophotometric Method for the

2019-7-31  Flotation-Spectrophotometric Method for the Determination 1530 Quantitative results A calibration graph for the determination of Al 3+ was constructed under optimum experimental conditions described above. Beer’s law was obeyed over the concentration range of 1.0-50 ng ...

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Flotation-Spectrophotometric Method for the

2010-10-2  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 mol -1 cm -1 . 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

2008-2-27  Flotation of the complex was carried out with heptane, followed by dissolution in N, N-dimethylformamide (DMF) for subsequent spectrophotometric determination. The molar absorptivity was 2.92×10 5 mol − cm − at 518 run.

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Flotation–Spectrophotometric Determination of Mercury

spectrophotometric determination of low level of mercury in aquatic samples by a simple flotation method in which the anionic mercury iodide complex is strongly associated with ferroin as a cationic dye reagent. Experimental Materials and instrumentation All the reagents were

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Flotation‐Spectrophotometric Determination of Trace ...

A sensitive flotation‐spectrophotometric method for the determination of thorium is reported. The method is based on the ion‐associate formation between thorium, xylenol orange (XO) and cethyltrimeth...

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A sensitive and simple flotation-spectrophotometric

2008-5-3  A simple and sensitive spectrophotometric procedure for the determination of microgram amounts of silver has been developed. The method is based on the flotation of the complex of Schiff base, 2-[(2-mercaptophenylimino)methyl]phenol (MPMP), and silver at the aqueous solution-chloroform interface. The complex was then separated and dissolved in 5 mL of methanol, and its absorbance

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Flotation spectrophotometric determination of

Flotation of the complex was carried out with heptane, followed by dissolution in N,N-dimethylformamide (DMF) for subsequent spectrophotometric determination. The molar absorptivity was 2.92×10 5 mol-1 cm-1 at 518 nm. Beer's law was obeyed in the range 5-80 µg/litre and the detection limit was 0.4 µg/litre.

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Selective Flotation-Spectrophotometric Determination of ...

2017-4-20  spectrophotometric determination of copper,8,13—15)little work has been done using PPT16)and perhaps no trial has been made to float the analyte with this reagent. The present investigation aims to develop a simple, rapid and selective procedure for the preconcentration and determination of CuII in natural waters, blood and drug samples ...

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SciELO - Brasil - A selective flotation

A selective flotation-spectrophotometric method for the determination of nickel using dimethylglyoxime . Hamid Hashemi-Moghaddam * * e-mail: [email protected] Department of Chemistry, Islamic Azad University Damghan Branch, PO Box 36716-39998, Damghan, Iran. ABSTRACT

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Flotation-spectrophotometric method for determining ...

The conditions for the formation of a suitable coloured palladium ion-association complex with a basic dye have been examined, and a spectrophotometric method developed for the determination of palladium with bromide and Rhodamine 6G (R6G). Benzene is used for flotation and dimethylformamide for dis

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Flotation–Spectrophotometric Determination of Mercury

spectrophotometric determination of low level of mercury in aquatic samples by a simple flotation method in which the anionic mercury iodide complex is strongly associated with ferroin as a cationic dye reagent. Experimental Materials and instrumentation All the reagents were

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Flotation–Spectrophotometric Method for Separation

A flotation–spectrophotometric method for the determination of Cu2+ has been developed. The flotation process is based on the formation of a ternary ion-associate between Cu2+, methylthymol blue (MTB) and cetyltrimethylammonium bromide (CTAB) which is floated at the interface of aqueous phase and n–hexane by shaking in a separating funnel.

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Flotation Spectrophotometric Determination of

2008-2-27  Flotation of the complex was carried out with heptane, followed by dissolution in N, N-dimethylformamide (DMF) for subsequent spectrophotometric determination. The molar absorptivity was 2.92×10 5 mol − cm − at 518 run.

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Floatation-Spectrophotometric Determination of

2019-9-1  A novel and sensitive floatation-spectrophotometric method is presented for determination of trace amounts of thorium in water samples. The method

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FLOTATION-SPECTROPHOTOMETRIC

A very sensitive and selective flotation-spectrophotometric method for the determination of microamounts of Ge based on Ge-o-chlorophenylfluorone system has been investigated. The Ge complex is flotated with cyelohexane (plus iso-amyl acetate) and dissolved in alcohol, The Sandell sensitivity is 0.000483μg/cm~2 at 520nm. The method has been applied to the determination of microamounts of

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Flotation-Spectrophotometric Determination of

2021-5-9  Flotation-Spectrophotometric Determination 3,5-Dinitrocatechol and Rhodamine B of Vanadium with Ryszard LOBINSKI and Zygmunt MARCZENKO Department of Analytical Chemistry, Technical University, ul. Noakowskiego 3, 00-664 Warsaw, Poland A new method of flotation separation and preconcentration of vanadium traces is described.

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SciELO - Brasil - A selective flotation

A selective flotation-spectrophotometric method for the determination of nickel using dimethylglyoxime . Hamid Hashemi-Moghaddam * * e-mail: [email protected] Department of Chemistry, Islamic Azad University Damghan Branch, PO Box 36716-39998, Damghan, Iran. ABSTRACT

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Extraction flotation/spectrophotometric

A spectrophotometric method for the determination of Zn in serum, based on the extraction flotation of 2-(5-bromo-2-pyridylazo)-5-(N-propyl-N-sulfopropylamino) phenol (5-Br-PAPS)-Zn(II) chelate with the aid of tetrahexylammonium chloride (THA) as a collector and small nitrogen bubbles, has been developed.Only 0.1 ml of sample was necessary, because preconcentration for Zn in serum was carried ...

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Flotation-spectrophotometric determination of

adshelp[at]cfa.harvard.edu The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86A

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