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| Determination of total boron in amorphous boron powder |
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Received:February 15, 2012
Revised:July 17, 2012
Accepted:February 16, 2012
Published Online:July 30, 2012
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| DOI： |
| KeyWord:amorphous boron powder;distillation digestion;total boron;neutralization titration method |
| Author | Institution |
| JIANG Qiutao |
Beijing General Research Institute of Mining and Metallurgy |
| ZHANG Lianxiang |
Beijing General Research Institute of Mining and Metallurgy |
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| Abstract: |
| The sample was digested in Mixture of sulphuric and nitric acid with distillation. methyl red - bromocresol green mixed indicator and phenolphthalein indicator of ethanol. The free state of boric acid and mannitol reaction in solution, Titration of mannitol - boric acid complex with NaOH standard solution. The recovery rate is 96.29% ~ 98.98% and the relative standard deviation ( RSD ) is at 0.80% ~ 1.50%. The obtained results with the American military standard means consistent results. The method is more simple, convenient, fast. |
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