書誌事項
- タイトル別名
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- Rapid decomposition and analysis of refractory tungsten compounds by fusion with ammonium hydrogen sulfate.
- リュウサン スイソ アンモニウム ユウカイ ニヨル ナンヨウセイ タングステン
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A simple and rapid method for the decomposition of refractory tungsten compounds has been proposed. The tungsten samples (WO3, WS2, WC, alloys and ores) were de-composed by fusion with ammonium hydrogen sulfate, which was found to be a suitably powerful flux for dissolving various refractory tungsten compounds. An accurately weighed sample (ca. 4050 mg) was placed in a dry Pyrex glass test-tube (16 mm o.d., 180 mm length). Ammonium hydrogen sulfate (ca. 2 g) was added to the tube and mixed with the sample by agitating of the tube. The bottom of the test tube was gently heated with a swirling motion over a small gas flame of a Bunsen burner with a fish-tail at a temperature of ca. 350450°C. Heating was continued until a clean, translucent yellow melt was formed. The cooled melt was dissolved in a 10% (w/v) ammonium tartrate solution. Tungsten(VI) oxide and sulfide were dissolved by heating for about 4 min, for carbide it was about 8 min. Finally, the concentration of the tungsten in the, resulting solution was determined by atomic-absorption spectrometry using a dinitrogen oxide-acetylene flame. This method was applied successfully to various hard metals and ores (scheelite). The tungsten, cobalt and iron in the samples were determined.
収録刊行物
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- 分析化学
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分析化学 46 (2), 101-105, 1997
公益社団法人 日本分析化学会
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詳細情報 詳細情報について
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- CRID
- 1390001204051464448
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- NII論文ID
- 110002907102
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- NII書誌ID
- AN00222633
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- COI
- 1:CAS:528:DyaK2sXhtVCns70%3D
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- NDL書誌ID
- 4139712
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- ISSN
- 05251931
- http://id.crossref.org/issn/05251931
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- IRDB
- NDL
- Crossref
- NDL-Digital
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可