石煤中五氧化二钒容量法测定研究与应用

Research and Application on Measurement of Vanadium Pentoxide Volumetric Method in Stone Coal

摘要: 在黑色岩系(石煤)钒矿标准物质研制中，为了获得候选物中准确的五氧化二钒质量百分数测定结果，通过采用基准校验，不同分解方法与测定试验，倍比试验，标准加入与回收试验等手段，开展了石煤中五氧化二钒容量法测定研究。结果表明，采用硫酸亚铁铵容量法测定，具有方法简便、测定效率高和测定精密度高等优点，但测定结果要达到《地质矿产实验室测试质量管理规范(DZ/T0130-2006)》的质量要求，必须熟悉和掌握容量法测定的技术要领。最后将测定方法应用到石煤钒矿标准物质研制的定值，达到了量值溯源的目的，取得了候选物中准确的五氧化二钒质量百分数含量结果。

Abstract: During the preparation of vanadium ore standard material from stone coal (black shale series), in order to obtain the accurate measurement results of vanadium pentoxide mass percentage, ref-erence checks, different decomposition methods and measurement tests, double ratio tests and recovery tests are used to carry out determination of vanadium pentoxide volumetric in bone coal. The result shows that ammonium ferrous sulfate volumetric method has advantages of simple, ef-ficient and high measurement precision. But to achieve quality requirements of “Geology and Mineral Resources Laboratory Testing and Quality Management Practices (DZ/T0130-2006)”, it requires that the operators should be familiar with the technical essentials of volumetric method. Finally, the measurement method is applied to the preparation of vanadium ore standard material in stone coal developed by value. The traceability purposes and the exact percentage content of vanadium pentoxide quality results are achieved.