| 无定形硼粉中的总硼测定方法研究 |
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| 引用本文： | 姜求韬,章连香. 无定形硼粉中的总硼测定方法研究[J]. 矿冶, 2012, 21(3): 95-96 |
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| 作者姓名： | 姜求韬 章连香 |
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| 作者单位： | 北京矿冶研总院,北京,100160 |
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| 摘 要： | 研究了无定形硼粉中的总硼测定方法。用硫酸和硝酸混合酸蒸馏消解试样,甲基红-溴甲酚绿及酚酞乙醇混合指示剂为滴定指示剂,利用溶液中游离的硼酸与甘露醇作用,用NaOH标准溶液滴定溶液中的甘露醇硼酸络合物,样品加标回收率为96.29.29%～98.98%,相对标准偏差(RSD)为0.80%～1.50%,所得结果与美国军用标准方法结果一致。该方法更简单、方便、快捷。
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| 关 键 词： | 无定形硼粉 蒸馏消解 总硼 中和滴定法 |
| 收稿时间： | 2012-02-15 |
| 修稿时间： | 2012-07-17 |
Determination of total boron in amorphous boron powder |
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| JIANG Qiutao and ZHANG Lianxiang. Determination of total boron in amorphous boron powder[J]. Mining & Metallurgy, 2012, 21(3): 95-96 |
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| Authors: | JIANG Qiutao and ZHANG Lianxiang |
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| Affiliation: | (Beijing General Research Institute of Mining and Metallurgy,Beijing 100160,China) |
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| Abstract: | The determination method of total boron in amorphous boron powder is studied.The sample was digested in mixture of sulphuric and nitric acid with distillation.Methyl red-bromocresol green mixture indicator and phenolphthalein indicator of ethanol are used as titration indicator,by the reaction between free state boric acid and mannitol in solution,use NaOH standard solution to titrate mannitol-boric acid complex.The recovery rate is between 96.29% ～ 98.98% and the relative standard deviation(RSD) is between 0.80%～1.50%.The results obtained comply with the American military standard.The method is simpler,more convenient and faster. |
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| Keywords: | amorphous boron powder distillation digestion total boron neutralization titration method |
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