Determination of impurities in tungsten metal

Crawley, R.H.A.; Aspinal, M.L.

doi:10.1016/s0003-2670(00)87959-3

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1961

1988

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Cited by 10 publications

(1 citation statement)

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“…Those described in the literature are isobutyl, amyl, isoamyl, or hexyl alcohol, and nitrobenzene (1-8, 6, 8-11). Crawley and Aspinal (3) recommended the chloroform-ethanol extraction system proposed for copper with neocuproine (7). The chloroform-ethanol extraction system was selected because the organic liquid is heavier than the aqueous and can be readily separated from the aqueous phase.…”

Section: Color Reactionmentioning

confidence: 99%

Spectrophotometric determination of traces of iron with 4,7-diphenyl-1,10-phenanthroline. Application to vanadium, chromium, titanium, niobium, tantalum, uranium, tungsten metals, alloys, and compounds

Gahler¹,

Shubert²

1961

Anal. Chem.

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Section: Color Reactionmentioning

confidence: 99%

Spectrophotometric determination of traces of iron with 4,7-diphenyl-1,10-phenanthroline. Application to vanadium, chromium, titanium, niobium, tantalum, uranium, tungsten metals, alloys, and compounds

Gahler¹,

Shubert²

1961

Anal. Chem.

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Determination of Trace Iron(II) in the Presence of Iron(III)

Luo

Hwang

Pung

et al. 1978

J Chinese Chemical Soc

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The determination of trace iron(II) is' usually interfered by the presence of iron(Ill) when ortho-phenanthroline colorimetric method is used. In this report a chromogenic reagent which contain'S onho-pbenantnroline-Blj'I'A mixture has been developed to decrease the interference of ferric ion after adjusting the acidity of sample at 0.1 N by adding the sulfuric acid. .The procedure -is also simplified by introducing sulfamate buffer solution (pH == I.S) without adjusting the acidity of sample with 'Sulfuric acid. If iron(I1l) is not present in the sample. this method is also applicable. The comparative results are exhibited for the present method and the conventional o-phenanthroline method.

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The Assay for Iron in Soils and Clay Minerals

Loveland

1988

Iron in Soils and Clay Minerals

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Determination of impurities in tungsten metal

Cited by 10 publications

References 3 publications

Spectrophotometric determination of traces of iron with 4,7-diphenyl-1,10-phenanthroline. Application to vanadium, chromium, titanium, niobium, tantalum, uranium, tungsten metals, alloys, and compounds

Spectrophotometric determination of traces of iron with 4,7-diphenyl-1,10-phenanthroline. Application to vanadium, chromium, titanium, niobium, tantalum, uranium, tungsten metals, alloys, and compounds

Determination of Trace Iron(II) in the Presence of Iron(III)

The Assay for Iron in Soils and Clay Minerals

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