磷矿石化学成分分析标准物质研制
中国地质调查局武汉地质调查中心, 湖北 武汉 430205 |
Preparation of Phosphate Ore Reference Materials for Chemical Composition Analysis
Wuhan Center of Geological Survey, China Geological Survey, Wuhan 430205, China |
开元棋牌的娱乐平台_开元棋牌网站送彩金_开元棋牌下载送金币：磷矿的开发与综合利用不仅需要分析磷等主要元素，也需要准确地测定稀土元素和微量元素。分析测试过程需要含量适中、定值组分全的磷矿石标准物质进行质量监控，国内外现有的磷矿石标准物质无论是从定值指标还是含量梯度范围等方面均无法满足此需求。本文研制了4个不同类型磷矿石成分分析标准物质。样品采集自河北张家口钒山磷矿、贵州织金新华磷矿、云南昆阳磷矿、湖北神农架火炼坡磷矿4个典型矿区，其中张家口钒山磷矿和织金新华磷矿为含稀土的磷矿。检验结果表明样品的均匀性、稳定性良好；通过11家实验室协作定值，定值元素包括造岩主量元素、稀土元素和痕量元素共37项，其中3个组分为参考值，其余均给出标准值和不确定度。4个磷矿石标准物质形成了一个从边界品位、工业品位到磷精矿较为完整的含量系列，P2O5的含量分别为10.57%、18.91%、27.78%、39.40%，稀土元素总量分别为0.16%、0.11%、0.032%、0.0083%，可满足磷矿勘查、评价和综合利用开发中对标准物质的需求。
Preparation of Phosphate Ore Reference Materials for Chemical Composition Analysis
ABSTRACT?For the development and comprehensive utilization of phosphate ore it is not only necessary to analyze the main elements such as phosphorus, but it is also necessary to determine accurately the rare earth, trace and other elements. Phosphate Ore Reference Materials (PORMs) with numbers of components and suitable contents can be used for quality control during analysis. However, available PORMs in China and abroad do no meet the requirements in terms of the element contents and the content range. Four different types of PORMs have been developed and are described in this study. The samples of phosphate ores were collected from the Zhangjiakou Fanshan phosphate mine in Hebei province, Xinhua phosphate mine in Zhijin of Guizhou Province, Kunyang phosphate mine in Yunnan Province, and Huolian phosphate mine in Shennongjia of Hubei Province. Zhangjiakou Fanshan phosphate mine and Xinhua phosphate mine are rich in rare earth elements (REEs). Four samples were homogeneous and stable. The results from 11 laboratories were combined to confirm certified values and uncertainty of 37 components, which include major elements, REEs, and trace elements. Three components were taken as reference values and the rest were characterized as certified values. The four PORMs cover a complete content series from cut-off grade, production-grade, to phosphate concentrate with P2O5 contents of 10.57%, 18.91%, 27.78% and 39.40%, respectively, and the total REEs contents of 0.16%, 0.11%, 0.032% and 0.0083%, respectively. The developed PORMs meet the requirements for exploration, evaluation, and comprehensive utilization of phosphate ores.
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