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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 ...

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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 Hosseini, M.Saeid.; Hashemi-Moghaddam, H.; Kardan-Moghaddam, G. Annali di Chimica 97(1-2): 17-23 2007.

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Visualized monitoring of radioactive iodide ions in environment using

This detection device gives a low limit of detection (17 ng/L) and an excellent selectivity to iodide ion, as well as realizing visualized rapid monitoring of trace iodide in natural water samples by using ECL imaging technology. A new iodide detection mechanism, free radical annihilation (FRA), is presented, which involves an ECL co …

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Extraction equilibrium of the ion-associate of periodate with …

The extraction equilibrium of the ion-associate of periodate with amiloride hydrochloride was investigated spectrophotometrically. The ion-association constants, β, K D and K ex were determined. A convenient and simple spectrophotometric method was developed for periodate determination at 354 nm after extraction into 4-methyl-2 …

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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. The floated layer ...

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Separation and preconcentration of Ag(I) in aqueous …

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 flotation process was carried out using 500-ml aliquot of the aqueous solution and the floated layer was dissolved in 5 ml of 1 M HNO3 containing methanol (50% v/v) as the solvent.

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Bulletin of the Korean Chemical Society

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) …

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Flotation–Spectrophotometric Determination of Mercury …

ion-associate, which is subsequently attributed to the instability for ferroin and mercury iodide (HgI 4 2–) complexes at low and high pH values, respectively. The effect of iodide concentration on the formation of the ion-associate was studied in the range of 1.2 × 10–4 to 7.2 × 10–3 mol l–1. Curve A in Fig. 2, indicates that the ...

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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. by Mohammad Saeid Hosseini, Hamid Hashemi-Moghaddam, Gholamreza Kardan-Moghaddam. Annali di chimica. Read more related scholarly scientific articles …

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Separation and Preconcentration of Ag(I) in Aqueous …

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 …

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Sensitized extraction spectrophotometric determination of …

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 ...

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Sensitized extraction spectrophotometric determination of …

The interference of Cd 2+ is attributed to form a more stable complex with phen as Cd(phen) 3 2+ and produces an ion-associate with iodide. This interfering ion …

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Separation and Preconcentration of Ag(I) in Aqueous …

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 flotation process was carried out using 500-ml aliquot of the aqueous solution and the floated layer was dissolved in 5 ml of 1 M HNO 3 containing methanol (50% v/v) …

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Vortex-assisted liquid-liquid microextraction procedure for …

Tetrabutylammonium iodide contains a sufficiently hydrophobic cation to ensure a high distribution constant of the ion associate as well as the iodide ion necessary to form the extractable triiodide anionic complex. Moreover, using the colorless countercation TBA allows the shortcomings of using colored counterions – the main …

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Flotation-Spectrophotometric Determination of Mercury in …

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 …

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On-site determination of tin in geological and water samples using

Tin (IV) reacts with iodide ions to give a yellow-colored complex. It is extractable into non-polar solvent such as chloroform in the presence of a base (phenylacetamide, butylacetamide, pentylacetamide, hexylacetamide, and octylacetamide), possibly due to the formation of an ion-associate species.

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Vortex-assisted liquid-liquid microextraction procedure for …

Tetrabutylammonium iodide contains a sufficiently hydrophobic cation to ensure a high distribution constant of the ion associate as well as the iodide ion necessary to form the extractable triiodide anionic complex. Moreover, using the …

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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. by Mohammad Saeid Hosseini, Hamid Hashemi-Moghaddam, Gholamreza Kardan-Moghaddam. Annali di chimica. Read more related scholarly …

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Flotation-spectrophotometric determination of mercury in …

Iodides. Phenanthrolines. Water. ferroin. Mercury. This paper describes a simple and highly selective method for separation, preconcentration and spectrophotometric determination …

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Flotation–Spectrophotometric Determination of Mercury …

The effect of iodide concentration on the formation of the ion-associate was studied in the range of 1.2 × 10–4 to 7.2 × 10–3 mol l–1. Curve A in Fig. 2, indicates that the maximum …

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Spectrophotometric determination of trace amounts of iodide …

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 green ...

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Spectrophotometric determination of trace amounts of …

of ionic associates of iodide-ions with a cationic dye have been reported [8]. Selectivity for such methods is low because of formation of ionic associates of cationic dye with other …

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[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 …

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Spectrophotometric determination of periodate or iodate …

(2). On the other hand, the S,O:-ions were found able to reduce the produced ion-associate (CH,),N+ 1, to the iodide ion. The determination of 10 pg of periodate or iodate by the proposed procedure in artificial fresh water containing 10 mg 1~ of sodium, calcium, chloride, sulphate and bicarbonate to- gether was carried out against a blank.

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Ternary ion-association complex based ion imprinted …

2.4. Pretreatment of IIPs. The ion imprinted polymer particles synthesized using iodide or thiocyanate system was leached with 6 M HCl for 18 h in order to selectively remove the templates, viz. [PdI 4] 2− or[Pd(SCN 4] 2−.The resultant polymer particles after filtration were dried at 80 °C to obtain leached polymer particles for the …

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Determination of association constants of inorganic ions …

Typical separations of anions on the C18 capillary using a BGE solution containing 0.1 and 15 mM C14N3S are shown in Fig. 1.In the case of the BGE solution containing 0.1 mM C14N3S, the separation selectivity is determined mainly by the inherent electrophoretic mobilities of the analyte anions.In the presence of 15 mM C14N3S, the …

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Vortex-assisted liquid-liquid microextraction procedure …

Tetrabutylammonium iodide contains a sufficiently hydrophobic cation to ensure a high distribution constant of the ion associate as well as the iodide ion necessary to form the extractable triiodide anionic complex. Moreover, using the colorless countercation TBA allows the shortcomings of using colored counterions – the main …

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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 …

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Flotation–Spectrophotometric Determination of Mercury in …

The determination of Hg(II) in tap, synthetic waste, and seawater samples was carried out by the present method and a well-established method of extraction with dithizone and the results were satisfactorily comparable so that the applicability of the proposed method was confirmed in encountering with real samples. This paper …

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Colorimetric detections of iodide and mercuric ions based …

A further incorporating of iodide ion significantly enhanced this catalysis. This enhancement provided a turn-on signaling toward iodide down to nanomolar level. It was then coupled to an interaction between iodide and mercuric ion, and a response toward Hg 2+ down to nanomolar was obtained as well. The method was advantageous …