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Usable Values of Nickel Ore and Nickel Concentrate Certified Reference Materials
Author(s) -
Cheng Zhizhong,
Liu Mei,
Huang Hongku,
Gu Tiexin,
Yan Weidong,
Wen Hongli
Publication year - 2015
Publication title -
geostandards and geoanalytical research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.037
H-Index - 73
eISSN - 1751-908X
pISSN - 1639-4488
DOI - 10.1111/j.1751-908x.2014.00261.x
Subject(s) - nickel , certified reference materials , inductively coupled plasma mass spectrometry , chemistry , sieve (category theory) , metallurgy , analytical chemistry (journal) , mass spectrometry , mineralogy , materials science , environmental chemistry , chromatography , detection limit , mathematics , combinatorics
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 H ongqiling 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 48 hr in a high‐alumina ball mill to a final size of < 0.074 mm. 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 N i 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 N ational O rganisation of R eference M aterials of C hina in 2012.