Turk G C, Yu L L, Salit M L, Guthrie W F
Analytical Chemistry Division, National Institute of Standards and Technology, Gaithersburg, MD 20899-8391, USA.
Fresenius J Anal Chem. 2001 Jun;370(2-3):259-63. doi: 10.1007/s002160100790.
Multielement analyses of environmental reference materials have been performed using existing certified reference materials (CRMs) as calibration standards for inductively coupled plasma-mass spectrometry. The analyses have been performed using a high-performance methodology that results in comparison measurement uncertainties that are significantly less than the uncertainties of the certified values of the calibration CRM. Consequently, the determined values have uncertainties that are very nearly equivalent to the uncertainties of the calibration CRM. Several uses of this calibration transfer are proposed, including, re-certification measurements of replacement CRMs, establishing traceability of one CRM to another, and demonstrating the equivalence of two CRMs. RM 8704, a river sediment, was analyzed using SRM 2704, Buffalo River Sediment, as the calibration standard. SRM 1632c, Trace Elements in Bituminous Coal, which is a replacement for SRM 1632b, was analyzed using SRM 1632b as the standard. SRM 1635, Trace Elements in Subbituminous Coal, was also analyzed using SRM 1632b as the standard.
已使用现有的有证标准物质（CRM）作为电感耦合等离子体质谱法的校准标准，对环境标准物质进行了多元素分析。分析采用了一种高性能方法，该方法得出的比较测量不确定度明显小于校准CRM的认定值不确定度。因此，测定值的不确定度与校准CRM的不确定度非常接近。提出了这种校准传递的几种用途，包括对替代CRM进行重新认证测量、建立一种CRM相对于另一种CRM的溯源性以及证明两种CRM的等效性。使用SRM 2704（布法罗河沉积物）作为校准标准，对RM 8704（一种河流沉积物）进行了分析。使用SRM 1632b作为标准，对替代SRM 1632b的SRM 1632c（烟煤中的微量元素）进行了分析。还使用SRM 1632b作为标准，对SRM 1635（次烟煤中的微量元素）进行了分析。
