Usable Values of Nickel Ore and Nickel Concentrate Certified Reference Materials

被引:8
作者
Cheng, Zhizhong [1 ]
Liu, Mei [2 ]
Huang, Hongku [2 ]
Gu, Tiexin [2 ]
Yan, Weidong [2 ]
Wen, Hongli [3 ]
机构
[1] China Geol Survey, Ctr Res & Dev, Beijing 100037, Peoples R China
[2] Inst Geophys & Geochem Explorat, Langfang 065000, Hebei, Peoples R China
[3] Natl Res Ctr Geoanal, Beijing 100037, Peoples R China
关键词
nickel ore; nickel concentrate; certified reference materials; certified value; uncertainty; minerai de nickel; concentre de nickel; materiaux de reference certifies; valeur certifiee; incertitude; CERTIFICATION;
D O I
10.1111/j.1751-908X.2014.00261.x
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
The preparation and characterisation of three nickel ores and two nickel concentrate certified reference materials are described in this paper. The samples of nickel ore and nickel concentrate were collected from the Hongqiling nickel deposit in Jilin province. The raw materials were crushed and passed through a 2.0-mm sieve. The rough samples were then ground for 48hr in a high-alumina ball mill to a final size of <0.074mm. Homogeneity of the samples was tested by X-ray fluorescence spectrometry (WD-XRF) and inductively coupled plasma-atomic emission spectrometry (ICP-AES). The relative standard deviations (RSD) of results on mass fraction measurements by WD-XRF were <1.0% m/m for eighteen components. F-tests showed that all five samples were homogeneous. Nineteen laboratories contributed with measurement results (2127 in total) for the certification of mass fractions for twenty-three elements and compounds. Twenty-three components in the nickel ores and twenty components in the nickel concentrates were characterised as certified values, while the Ni mass fractions ranges from 0.1 to 9.02% m/m in these certified reference materials. These five samples were approved as national certified reference materials by the National Organisation of Reference Materials of China in 2012. La preparation et la caracterisation de trois minerais de nickel et de deux concentres de nickel certifies de reference sont decrites dans le present article. Les echantillons de minerais et de concentres de nickel proviennent du gisement de Hongqiling situe dans la province de Jilin. Les matieres premieres ont ete broyes et passes a travers un tamis de 2.0mm. Les echantillons bruts ont ensuite ete broyes pendant 48 heures dans un broyeur a boulets en alumine jusqu'a obtention d'une taille finale <0.074mm. L'homogeneite des echantillons a ete testee par spectrometrie de fluorescence X (WD- XRF) et spectrometrie a emission optique (ICP-OES). Les ecarts-types relatifs (RSD) des resultats des mesures de la fraction de masse par WD- XRF etaient inferieurs a 1.0% m/m pour dix-huit elements. Les tests F ont montre que les cinq echantillons etaient tous homogenes. Dix-neuf laboratoires ont fourni des resultats de mesures (2127 au total) pour la certification de fractions de masse pour vingt-trois elements et composes. Vingt-trois composants dans les minerais de nickel et vingt composants dans les concentres de nickel ont ete caracterises comme des valeurs certifiees, tandis que les fractions de masse du Ni varient de 0.1 a 9.02% m/m dans ces materiaux de reference certifies. Ces cinq echantillons ont ete approuves en tant que materiaux de reference certifies au niveau national par l'Organisation nationale des materiaux de reference de Chine en 2012.
引用
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页码:221 / 232
页数:12
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