Spetrophotometric Determination of Uranium with 3- (2 - Arsonophenylazo) - 4,5 - dihydroxy - 2,7- naphthalenedisulfonic Acid (Trisodium Salt)

Holcomb, H.P.; Yoe, John H.

doi:10.1021/ac60162a011

Cited by 41 publications

(3 citation statements)

References 15 publications

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“…Standard stock solutions (1000 ppm) of thorium(IV) and uranium(VI) were prepared by dissolving requisite amounts of thorium nitrate tetrahydrate and uranyl nitrate hexahydrate, respectively, in quartz-distilled deionized water containing small amounts of nitric acid. Their final concentrations were then determined spectrophotometrically (29,30). pH adjustments were made with 0.1/0.01 M HC1 or NaOH and/or acetate buffers.…”

Section: Reagentsmentioning

confidence: 99%

Sequential Separation and Trace Enrichment of Thorium(IV) and Uranium(VI) on Chelating Resin Amberlite XAD-2-ortho-vanillinthiosemicarbazone (o-VTSC)

Jain¹,

Sait²,

Shrivastav³

et al. 1998

Separation Science and Technology

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Polystyrenc-divinylbenzene-based Amberlite XAD-2 was funetionalized with ort/io-vanillinthiosemicarbazone and its analytical properties were investigated. The resin was used successfully for the separation and preconcentration of thorium(IV) and uranium(VI) ions prior to their determination by spectrophotometry and by ICAP-AES and GF-AAS, respectively. The influence of several ions as interferents is discussed. The resin exhibits good chemical stability, reuseability, and a faster rate of equilibration for their determination. The proposed method has been applied to sequential chromatographic separation of thorium(IV) and uranium(VI) on river water samples with good analytical reliability such as recovery of 97-98%, relative standard deviation of 2-3%, and a detection limit of 100 ng-mL" 1 . The present method is also used for their determination in monazite sand and some standard geological materials.

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Section: Reagentsmentioning

confidence: 99%

Sequential Separation and Trace Enrichment of Thorium(IV) and Uranium(VI) on Chelating Resin Amberlite XAD-2-ortho-vanillinthiosemicarbazone (o-VTSC)

Jain¹,

Sait²,

Shrivastav³

et al. 1998

Separation Science and Technology

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“…* and the cyclic O-C-C-C-O group. 5 The reaction is complete at a pH of 8 to 9, and Beer's law is followed closely. At a wavelength of 600 nm, the molar absorptivity is 23 000.…”

Section: Formation Of Colored Complexmentioning

confidence: 99%

Spectrophotometric measurement of uranium in plutonium dioxide

Koski¹,

Gardner²,

Waterbury³

1974

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Uranium in plutonium dioxide is measured spectrophotometrically as the Arsenazo-I complex after separation by anion exchange resin in a hydrochloric acid medium. The sample is dissolved in 11M HC1 at 300°C in a sealed tube or, alternatively, by repeated fumings with HNO 3 -HF-H 2 SO 4 mixtures. A sample size of 70 mg permits the determination of 300 to 1100 ppm of uranium with a relative standard deviation of 10%. At the 1400 to 3000 ppm level the relative standard deviation is 5%. The procedure is normally free from interferences.

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“…This leaves us with just Bg, B., and Q. as undetermined constants, which are obtained from a least-squares fit of our model to the NRL data on enthalpy vs temperature. Now, from calculated values of the x., the molecular weight of the mixture can be determined as -E 3 = 1,2,4 Y y (12) where ju. is the molecular weight of the jth species.…”

Section: Corresponding Statesmentioning

confidence: 99%

ADVANCED SPACE NUCLEAR POWER PROGRAM. Progress Report No. 6, January-- March 1967.

1967

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Spetrophotometric Determination of Uranium with 3- (2 - Arsonophenylazo) - 4,5 - dihydroxy - 2,7- naphthalenedisulfonic Acid (Trisodium Salt)

Abstract: Uranium(1V) forms a number of complexes with phosphate, depending upon the relative concentration (6), and also forms agarlike gels which are sometimes called precipitates. These solids LITERATURE CITED

Cited by 41 publications

References 15 publications

Sequential Separation and Trace Enrichment of Thorium(IV) and Uranium(VI) on Chelating Resin Amberlite XAD-2-ortho-vanillinthiosemicarbazone (o-VTSC)

Sequential Separation and Trace Enrichment of Thorium(IV) and Uranium(VI) on Chelating Resin Amberlite XAD-2-ortho-vanillinthiosemicarbazone (o-VTSC)

Spectrophotometric measurement of uranium in plutonium dioxide

ADVANCED SPACE NUCLEAR POWER PROGRAM. Progress Report No. 6, January-- March 1967.

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