| 邻菲啰啉助溶保护-容量法测定电气石中的氧化亚铁 |
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| 引用本文： | 张会堂.邻菲啰啉助溶保护-容量法测定电气石中的氧化亚铁[J].山东国土资源,2018,34(6). |
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| 作者姓名： | 张会堂 |
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| 作者单位： | 山东省地质科学研究院;国土资源部金矿成矿过程与资源利用重点实验室;山东省金属矿产成矿地质过程与资源利用重点实验室 |
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| 摘 要： | 电气石是一种含硼的铝硅酸盐矿物,是成岩成矿作用的灵敏示踪剂,通过测试围岩电气石中氧化亚铁的含量,可以鉴定电气石所赋存岩床的成因。但是,国内外目前尚无系统的电气石化学成分标准分析方法及电气石化学成分标准物质,针对电气石中氧化亚铁分析方法的研究更是罕有报道。该文通过在溶矿过程中加入邻菲啰啉,与亚铁形成络合物,对亚铁能够起到较好的助溶和保护效果,建立了在聚四氟乙烯坩埚中加入邻菲啰啉、氢氟酸及硫酸,中高温电热板加热溶矿,重铬酸钾容量法测定电气石中的亚铁的方法。该方法的精密度(RSD,n=12)为0.59%,样品加标回收率为99.3%~100.9%。经过多家实验室间的比对实验,证明该方法准确度高,具有较好的应用效果。
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| 关 键 词： | 电气石 邻菲啰啉 助溶保护 氧化亚铁 |
Determination of Ferrous Oxide in Tourmaline by Using Phenanthroline Solubilization ProtectionVolumetric Method |
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| ZHANG Huitang.Determination of Ferrous Oxide in Tourmaline by Using Phenanthroline Solubilization ProtectionVolumetric Method[J].Land and Resources in SHANDONG Province,2018,34(6). |
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| Authors: | ZHANG Huitang |
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| Abstract: | Tourmaline is a boron containing aluminosilicate mineral. It is a sensitive tracer of diagenesis and mineralization. By testing the contents of iron oxide in tourmaline of surrounding rocks, the origin of tourmalinebearing bderock can be identified. However, there is no systematic standard analysis method and standard substance of chemical compositions of tourmaline, and the study on ferrous oxide analysis method of tourmaline is rather rare. In this paper, by adding phthalazine to form a complex with ferrous metal in the process of ore dissolving, a good solution and protection effect can be obtained for ferrous metal. A tetrafluoroethylene crucible is added to polyphenanthroline, hydrofluoric acid and sulfuric acid, and the medium and high temperature heating plate is used to heat the ore and determine the ferrous contents in the tourmaline by the potassium dichromate capacity method. The precision of the method (RSD, n=12) is 0.59%, and the rate of recovery is 99.3%~100.9%. Through comparison experiments among many laboratories, it is proved that the method is of high accuracy and good application effect. |
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| Keywords: | Tourmaline phenanthroline solubilization protection ferrous oxide |
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