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 × …
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 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 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.
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 …
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...
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 …
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.
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 …
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 …
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.
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.
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) …
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 …
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
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.
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.
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.
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.
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 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.
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.
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 …
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 complexes with brilliant green, formed in excess of iodide, was developed for the spectrophotometric quantification of iodide.
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.
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.
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 trace amounts of iodide-ions in form of ionic associate with brilliant green using electrochemical oxidation. ... Spectrophotometric determination of iodide ion based on the color fading reaction of the ion association complex of Adenin Silver (I) ion and eosin. Bunseki Kagaku, 58 ...
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 ...
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.
Request PDF | Sensitized extraction spectrophotometric determination of Hg(II) with dithizone after its flotation as ion-associate using iodide and ferroin | This paper describes a simple and ...
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 …
