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《化学分析计量》 2019年第05期
DOI:10.3969/j.issn.1008-6145.2019.05.010
硫酸亚铁铵滴定法测定低品位石煤钒矿中的五氧化二钒
隆英兰,王景凤,韩俊丽,马悦茹
西部矿业集团科技发展有限公司,青海西部矿业工程技术研究有限公司,青海省高原矿物加工工程与综合利用重点实验室,青海省有色矿产资源工程技术研究中心,西宁 810006 
Determination of vanadium pentoxide in low content stone coal vanadium ore by ammonium ferrous sulfate titration
LONG Yinglan, WANG Jingfeng, HAN Junli, MA Yueru
Technology Development of Western Mining Group Co., Ltd., The Engineering and Technology Research of Qinghai Western Mining Co., Ltd., Qing hai Key Laboratory Plateau Comprehensive Utilization and Mineral Processing Engineering, Qinghai Nonferrous Mineral Resources Engineering Technology Research Center, Xining 810006, China 
摘要:建立硫酸亚铁铵滴定法测定低品位石煤钒矿中五氧化二钒含量的方法。将石煤钒矿样品在920℃下灼烧20 min进行预处理,以驱除石煤钒矿石中的含碳化合物和有机物,通过酸度调节,实现滴定终点的突跃。用硫酸亚铁铵滴定法测定样品中五氧化二钒的含量。测定结果的相对标准偏差为0.43%(n=10),用该法测定国家标准物质和实验室内控样品,测定值与参考值一致。该方法具有较高的准确度和良好的精密度,适宜于低品位石煤钒矿中五氧化二钒含量为0.5%以上样品的测定。 
Abstract:The method for determination of vanadium pentoxide in low content stone coal vanadium ore by ammonium ferrous sulfate titration was established. Stone coal vanadium ore sample was cauterized for 20 min at 920℃ for pretreatment, so as to remove carbonaceous compounds and organic compounds in stone coal vanadium ore. By adjusting acidity, a sudden jump of titration end point was achieved. The content of vanadium pentoxide was determined by ammonium ferrous sulfate titration. The relative standard deviation of determination results was 0.43%(n=10). The determination values of national standard substance and laboratory controlled sample by this method were consistent with the reference value. The method has high accuracy and precision, which is suitable for the determination of vanadium pentoxide content of more than 0.5% in low-grade quartic vanadium ore. 
关键词:低品位石煤钒矿;五氧化二钒;硫酸亚铁铵滴定法 
Keywords:low content stone coal vanadium ore; vanadium pentoxide; ammonium ferrous sulfate titration 
基金:海省重大科技专项(2018–GX–A7);青海省科技计划项目(2018–ZJ–782) 
本文引用格式:
隆英兰,王景凤,韩俊丽,等.硫酸亚铁铵滴定法测定低品位石煤钒矿中的五氧化二钒[J].化学分析计量,2019,28(5):41-44. LONG Y L,WANG J F,HAN J L,et al. Determination of vanadium pentoxide in low content stone coal vanadium ore by ammonium ferrous sulfate titration[J]. Chemical analysis and meterage,2019,28(5):41-44. 

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