| EDTA滴定法测定镍矿石中氧化钙 |
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| 引用本文： | 郝原芳, 徐英奎. EDTA滴定法测定镍矿石中氧化钙[J]. 地质与资源, 2014, 23(6): 580-582. doi: 10.13686/j.cnki.dzyzy.2014.06.017 |
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| 作者姓名： | 郝原芳 徐英奎 |
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| 作者单位： | 沈阳地质矿产研究所/中国地质调查局 沈阳地质调查中心, 辽宁 沈阳 110032 |
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| 摘 要： | 建立了利用EDTA滴定法测定镍矿石中氧化钙的方法.考察了镍、碱度、沉淀剂、干扰元素、钙试剂对滴定的影响.确定了最佳的实验条件：温度50~60℃，陈化时间1 h，饱和草酸铵用量20 mL.方法检出限为1%，相对标准偏差1.1%~2.1%，回收率98.98%~102.6%.本方法灵敏度高，适合于镍矿石中氧化钙的快速测定.
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| 关 键 词： | 草酸铵 分离 EDTA滴定 镍矿石 氧化钙 |
| 收稿时间： | 2014-03-27 |
| 修稿时间： | 2014-04-22 |
DETERMINATION OF CALCIUM OXIDE IN NICKEL ORES WITH EDTA TITRATION |
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| HAO Yuan-fang, XU Ying-kui. DETERMINATION OF CALCIUM OXIDE IN NICKEL ORES WITH EDTA TITRATION[J]. Geology and Resources, 2014, 23(6): 580-582. doi: 10.13686/j.cnki.dzyzy.2014.06.017 |
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| Authors: | HAO Yuan-fang XU Ying-kui |
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| Affiliation: | Shenyang Institute of Geology and Mineral Resources, CGS, Shenyang 110032, China |
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| Abstract: | The paper establishes EDTA titration for the determination of calcium oxide in nickel ores, investigates the effect of nickel, alkalinity, precipitant, interference elements and calcium reagent on titration, and determines the optimal experimental conditions： temperature of 50-60 ℃, 1 hour aging time and 20 mL saturated ammonium oxalate, with method detection limit of 1%, relative standard deviation of 1.3%-2.1% and recovery of 98.98%-102.6%. With high sensitivity, the method is suitable for rapid determination of calcium oxide in nickel ores. |
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| Keywords: | ammonium oxalate separation EDTA titration nickel ore calcium oxide |
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