Determining Low Concentrations of Hafnium in Zirconium

Mortimore, D. M.; Noble, Le

doi:10.1021/ac60074a023

Cited by 19 publications

(5 citation statements)

References 14 publications

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“…Moreover, pure binary mixtures are required in order to obtain reliable results. These disadvantages do not affect optical emission and x-ray fluoresence spectrometric techniques and procedures covering the range from 0.003% hafnium in zirconium to 0.5% zirconium in hafnium have been described (1,5,6,10,12,13). None of the work published thus far has considered the determination of zirconium below 0.5% in purified hafnium.…”

Section: Literature Citedmentioning

confidence: 99%

Emission Spectrometric Determination of Low Percentages of Zirconium in Hafnium

Gray¹,

Fassel²

1956

Anal. Chem.

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Section: Literature Citedmentioning

confidence: 99%

Emission Spectrometric Determination of Low Percentages of Zirconium in Hafnium

Gray¹,

Fassel²

1956

Anal. Chem.

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“…Mortimore and Noble developed a spectrographic method for determining 0.003 to 0.4% hafnium in zirconium, involving excitation of zirconium oxide samples in a direct current arc (129). The sensitivity of this method is unusually good and precision attainable is adequate for most purposes.…”

Section: Titanium and Zirconiummentioning

confidence: 99%

Review - Nonferrous Metallurgy

Moss¹

1955

Anal. Chem.

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“…Many of these methods are applicable to rocks containing small amounts of zirconium and hafnium, after chemical concentration of these elements. The excellent method described by Mortimore and Noble (1953) was unsuitable for the complete problem at hand because the hafniumzirconium ratio was not included. Besides, the analysis of zirconium for hafnium with little or no silicon present and that of zircon with approximately 30 percent silicon would present different problems.…”

Section: Introduction and Acknowledgmentsmentioning

confidence: 99%

A spectrographic method for determining the hafnium-zirconium ratio in zircon

Waring¹,

Worthing²

1956

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To develop a rapid spectrographic method for the determination of hafnium, the hafnium-zirconium ratio, and percentage of zirconium in the mineral .zircon, the ratio was determined first by plotting the log of the intensity ratios against the log of the hafnium-zirconium ratio by weight of the standards, using -zirconium as an internal standard (zirconium 2761.911 A and hafnium 2641.406 A or zirconium 2761.911 A and hafnium 2820.224 A). Straight-line curves were produced when the line pairs zirconium 2538.405 A and hafnium 2641.406 A were used in a similar manner for the hafnium determinations. After the liafniumzirconium ratios and the hafnium percentages were determined, the zirconium percentages were determined arithmetically and some were checked by direct spectrographic analysis. When chemical methods were used to check the spectrographic hafnium and zirconium totals, an average spread of 0.14 was obeserved. The results indicated an average accuracy of 3 percent of the hafnium present in the range of 0.5 to 2.0 percent, and 0.6 percent for zirconium in the 43 to 58 percent range.

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Determining Low Concentrations of Hafnium in Zirconium

Cited by 19 publications

References 14 publications

Emission Spectrometric Determination of Low Percentages of Zirconium in Hafnium

Emission Spectrometric Determination of Low Percentages of Zirconium in Hafnium

Review - Nonferrous Metallurgy

A spectrographic method for determining the hafnium-zirconium ratio in zircon

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