آخرین محصولات
Spectrophotometric determination of trace amounts of …
4 of ionic associates of iodine-iodide complexes with brilliant green, formed in excess of iodide, was developed for the spectrophotometric quantification of iodide. The slope of the calibration curve yields a molar extinction coeficient of ε = 3·105 L mol-1cm-1.
Spectrophotometric determination of trace amounts of iodide-ions …
A combined method involving electrochemical oxidation of iodide to iodate at a platinum electrode followed by extraction in CCl4 of ionic associates of iodine-iodide complexes with brilliant...
Sensitized extraction spectrophotometric determination of …
DOI: 10.1016/j.talanta.2005.01.010 Corpus ID: 205307398; Sensitized extraction spectrophotometric determination of Hg(II) with dithizone after its flotation as ion-associate using iodide and ferroin.
Flotation-spectrophotometric determination of mercury in
Separation and preconcentration of Ag(I) in aqueous samples by flotation as an ion-associate using iodide and ferroin followed the determination by flame atomic absorption spectrometry. Hosseini MS, Hashemi-Moghaddam H, Kardan-Moghaddam G. Ann Chim, 97(1-2):17-23, 01 Jan 2007 Cited by: 0 articles | PMID: 17822260
Separation and Preconcentration of Ag(I) in Aqueous …
Separation and Preconcentration of Ag(I) in Aqueous Samples by Flotation as an Ion-Associate Using Iodide and Ferroin Followed the Determination by Flame Atomic Absorption Spectrometry . × Close Log In. Log in with Facebook Log in with ...
[PDF] Flotation-Spectrophotometric Determination of Ag(I) …
A simple and cost effective method for separation and preconcentration of Ag(1) 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 n-heptane. The floated layer was then dissolved in …
Separation and preconcentration of Ag(I) in aqueous …
The method was applied satisfactorily to recovery of Ag(I) from different aqueous samples and a large number of cations and anions even at high considerably foreign ion/Ag(I), ratios were not interfered. A simple method for separation/preconcentration and determination of Ag(I) in aqueous samples is described. The method is based on formation of an ion-associate between Ag(I) …
Separation and Preconcentration of Ag(I) in Aqueous …
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.
Spectrophotometric determination of periodate or iodate …
Iodate could be determined quantitively by the proposed procedure after oxidation to periodate with potassium persulphate. The effect of the diverse ions on the determination of …
Vortex-assisted liquid-liquid microextraction procedure for …
The second method is based on ion-pair formation between iodide and Fe(phen) 3 2 −, followed by extraction of the ion associate with a mixture of 150 μL of nitrobenzene and 250 μL of methanol. Both methods are completed with UV–Vis detection in a 10 μL microcell.
A novel vortex-assisted liquid–liquid microextraction …
Extraction of ion pairs of iodide or other iodine forms with bulky cations is a promising way to enhance the sensitivity and selectivity of SP determination.
Spectrophotometric determination of trace amounts of …
A combined method involving electrochemical oxidation of iodide to iodate at a platinum electrode followed by extraction in CCl 4 of ionic associates of iodine-iodide …
Spectrophotometric determination of trace amounts of …
A combined method involving electrochemical oxidation of iodide to iodate at a platinum electrode followed by extraction in CCl4 of ionic associates of iodine-iodide …
Spectrophotometric Determination of the Total Iodine …
Abstract—Optimal conditions for the microextraction concentration and spectrophotometric determina tion of iodine (I, V, VII) forms as ionic associates of triiodide anions with the cation …
Determination of Thallium(I) by Flotation
The detection limit (DL) was 4.7 × 10^-8 mol l^-1 and the RSD (n = 5) for 4 × 10^-7 mol l^-1 of Tl(I) was 3.34%. None of the alkaline cations was interfered, and the interference of many other metal ions was eliminated via ion-exchange separation using a cation-exchanger resin, Amberlite IR-120, before the flotation step.
Vortex-assisted liquid-liquid microextraction procedure for …
The second method is based on ion-pair formation between iodide and Fe(phen) 3 2 −, followed by extraction of the ion associate with a mixture of 150 μL of nitrobenzene and …
Flotation-spectrophotometric method for the …
Using Iodide and Brilliant Green Lata Mathew, Mundlapudi L. P. Reddy, Tumkur R. Ramamohan Talasila Prasada Rao*, Chonatumatom S. P. Iyer, and Alathur D. Damodaran ... The flotation of the ternary ion associate Hg-I-- BG complex with various solvents was next investi- gated and cyclohexane was found to be the best, as seen from Table 2. ...
Separation and preconcentration of Ag(I) in aqueous …
A simple method for separation/preconcentration and determination of Ag (I) in aqueous samples is described. The method is based on formation of an ion-associate between Ag (I)-iodide complex and ferroin, which can be floated at the interface of the aqueous/n-heptane phases.
Spectrophotometric determination of trace amounts of …
4 of ionic associates of iodine-iodide complexes with brilliant green, formed in excess of iodide, was developed for the spectrophotometric quantification of iodide. The slope of the calibration …
Separation and preconcentration of Ag(I) in aqueous …
A simple method for separation/preconcentration and determination of Ag (I) in aqueous samples is described. The method is based on formation of an ion-associate between Ag (I)-iodide …
Spectrophotometric Determination of the Total Iodine …
Abstract—Optimal conditions for the microextraction concentration and spectrophotometric determina tion of iodine (I, V, VII) forms as ionic associates of triiodide anions with the cation of astrazone brilliant red 4G dye have been found.
Sensitized extraction spectrophotometric determination of Hg…
This paper describes a simple and highly selective method for the separation, preconcentration and spectrophotometric determination of extremely low concentration 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 treated …
mol L Level Using Iodide and Ferroin as an Ion …
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 n - heptane. The floated layer was then dissolved in dimethylsulfoxide (DMSO) for the subsequent spectrophotometric determination.
A novel vortex-assisted liquid–liquid microextraction approach using …
A novel vortex-assisted liquid–liquid microextraction (VA-LLME) for determination of iodide was developed. The method includes the oxidation of iodide with iodate in the presence of hydrochloric acid followed by VA-LLME of the ion-pair formed between ICl 2 − and Astra Phloxine reagent (AP) and subsequent absorbance measurement at 555 nm. The appropriate …
A novel vortex-assisted liquid–liquid microextraction approach using …
Extraction of ion pairs of iodide or other iodine forms with bulky cations is a promising way to enhance the sensitivity and selectivity of SP determination.
EXTRACTION IN CCL4 OF IONIC ASSOCIATES OF IODINE …
Extraction constant of ionic associate of iodine-iodide complexes with brilliant green in CCl4 has been estimated (Kextr115±5). Iodide-ion is a main component among iodine-containing ions.
Flotation-spectrophotometric method for the determination …
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 × …
EXTRACTION IN CCL4 OF IONIC ASSOCIATES OF …
Extraction constant of ionic associate of iodine-iodide complexes with brilliant green in CCl4 has been estimated (Kextr115±5). Iodide-ion is a main component among iodine-containing ions.
Spectrophotometric determination of periodate or iodate ions …
Iodate could be determined quantitively by the proposed procedure after oxidation to periodate with potassium persulphate. The effect of the diverse ions on the determination of the periodate and/or iodate by the proposed procedures was also investigated.
mol L Level Using Iodide and Ferroin as an Ion …
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 n - heptane.
محصولات مرتبط
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