有证参考物质；有证参考材料 certified reference material(CRM) 有证参考物质；有证参考材料 certified reference material(CRM) 有证参考标准 certified reference standard ..
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方法用RELA 2009样本和有证参考物质对两种方法进行测量正确度验证；
Methods The measurement accuracy of two different methods was verified with the samples of RELA 2009 and certified reference material.
本文对典型的化学测量过程进行了阐明，对有证参考物质的一般研制步骤进行了考察。
The typical process of chemical measurement has been illustrated, and the general steps of the preparation of the CRMs have been reviewed in this paper.
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