Spectrophotometric Determination of Uranium with 1-(2-Pyridylazo)-2-naphthol

Gill, H. H.; Rolf, R. F.; Armstrong, Gavin

doi:10.1021/ac60143a019

Cited by 37 publications

(7 citation statements)

References 18 publications

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“…PAN was first introduced by Cheng and Bray (2, 8) as a metallochromic indicator for the complexometric titration of Cu(II), Zn(II), and In(III). Since then, it has been used both as a metallochromic indicator (4, 6-9) and a colorimetric reagent (11,12), and for the solvent extraction and the subsequent colorimetric determination of a number of metal ions (19).…”

Section: Resultsmentioning

confidence: 99%

Potentiometric Investigation of the Metal Complexes of 1-(2-Pyridylazo)-2-naphthol and 4-(2-Pyridylazo)resorcinol.

Corsini¹,

Yih²,

Fernaǹdo³

et al. 1962

Anal. Chem.

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Section: Resultsmentioning

confidence: 99%

Potentiometric Investigation of the Metal Complexes of 1-(2-Pyridylazo)-2-naphthol and 4-(2-Pyridylazo)resorcinol.

Corsini¹,

Yih²,

Fernaǹdo³

et al. 1962

Anal. Chem.

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“…Uranium(VI) forms a complex with PAN at basic pH. 31,32 Therefore, the effect of pH on the formation of U-PAN complex and the percent recoveries were studied at a pH range of 7-13 ( Figure 1). The recoveries of uranium increased with increasing pH from 7 to 10 and reached quantitative values at the pH range of 10-11.…”

Section: Effect Of Phmentioning

confidence: 99%

“…These results are in agreement with the literature. 26,31,32 Subsequent optimization studies were carried out at pH 10.…”

Section: Effect Of Phmentioning

confidence: 99%

“…PAN is a complexing reagent that forms a stable complex with U(VI) in basic media. 31,32 Therefore, the amount of PAN has a great influence on the percent recovery of U(VI). In order to investigate the effect of the amount of PAN on percent recoveries of U(VI), microextraction studies were carried out using different amounts of PAN in the range of 0.1-0.8 mg (Table 1).…”

Section: Effect Of Amount Of Panmentioning

confidence: 99%

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Supramolecular solvent microextraction of uranium at trace levels from water and soil samples

Khan¹,

Yılmaz²,

Soylak³

2017

Turk J Chem

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Abstract:A supramolecular solvent microextraction procedure was established for the separation/preconcentration of uranium(VI) (U(VI)) prior to its determination by UV-Vis spectrophotometry. 1-(2-Pyridylazo)-2-naphthol (PAN) was used to form a red chelate (U-PAN) with U(VI) at pH 10. U-PAN was extracted by undecanol in tetrahydrofuran. All the parameters that affect extraction efficiency like solution pH, amount of ligand, type and volume of supramolecular solvent, sample volume, and diverse ion effect were optimized. The preconcentration factor was 17. The detection limit was 0.31 µ g L −1 . The method was validated using GBW07424 (GSS-10 certified reference material). Microextraction was also applied to water and soil samples.

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“…Majority of the reported methods require prior removal of closely associated metal ions and hence lack selectivity. Some of the early chromogens employed for the spectrophotometric determination of uranium include Arsenazo-III [10], dibenzoyl methane [11], and 1-(2-pyridylazo)-2-naphthol [12,13]. ey were highly sensitive reagents with less selectivity involving prior separation of interference.…”

Section: Introductionmentioning

confidence: 99%

2‐Hydroxy‐1‐naphthaldehyde‐P‐hydroxybenzoichydrazone: A New Chromogenic Reagent for the Determination of Thorium(IV) and Uranium(VI)

Devi¹,

Reddy

2012

Journal of Chemistry

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Simple, sensitive, selective, direct, derivative, and simultaneous spectrophotometric methods are developed for the determination of uranium and thorium individually and simultaneously. The methods are based on the reaction of 2-hydroxy-1-naphthaldehyde-p-hydroxybenzoichydrazone (HNAHBH) with thorium(IV) and uranium(VI). HNAHBH reacts with thorium and uranium at pH 6.0 forming stable yellow and reddish brown coloured complexes, respectively. [Th(IV)-HNAHBH] complex shows maximum absorbance at 415 nm. Beer’s law is obeyed over the concentration range 0.464–6.961 μg mL−1with a detection limit of 0.01 μg mL−1and molar absorptivity,ε, 3.5 × 104 L mol−1 cm−1. Maximum absorbance shown by [U(VI)-HNAHBH] complex is at 410 nm with Beer’s law range 0.476–7.140 μg mL−1, detection limit 0.139 μg mL−1and molar absorptivity,ε, 1.78 × 104 L mol−1 cm−1. Highly sensitive and selective second-order derivative methods are reported for the direct and simultaneous determination of Th(IV) and U(VI) using HNAHBH. The applicability of the developed methods is tested by analyzing water, ore, fertilizer, and gas mantle samples for thorium and uranium content.

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Spectrophotometric Determination of Uranium with 1-(2-Pyridylazo)-2-naphthol

Cited by 37 publications

References 18 publications

Potentiometric Investigation of the Metal Complexes of 1-(2-Pyridylazo)-2-naphthol and 4-(2-Pyridylazo)resorcinol.

Potentiometric Investigation of the Metal Complexes of 1-(2-Pyridylazo)-2-naphthol and 4-(2-Pyridylazo)resorcinol.

Supramolecular solvent microextraction of uranium at trace levels from water and soil samples

2‐Hydroxy‐1‐naphthaldehyde‐P‐hydroxybenzoichydrazone: A New Chromogenic Reagent for the Determination of Thorium(IV) and Uranium(VI)

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