国家一级玄武岩标准物质研制的几个特点

国家一级标准物质GBW07126是玄武岩成分分析标准物质.样品采自四川省峨眉山玄武岩清音剖面的无斑玄武岩.峨眉山玄武岩是世界五大玄武岩之一,元素的丰度值和均一性很适合作为分析中量值传递的工具.此标准物质由成都理工大学负责研制,并邀请了国内外19个实验室参加定值测试,使用了现代高精密度测试技术(占方法的43.4%),因而确保了微量元素的分析质量.有54个元素定为标准值,4个元素定为参考值,还提供了9个贵金属元素及稀散元素的信息值.数据处理合理,并采用图示方法直观地显现成果.该标准物质推荐的最小用样量为40 mg(对大部分元素),对铂族元素,最小用样量为20 g.所以,此标准物质在微样分析技术中具有应用前景.

Development of certified reference material for Basalt GBW07126

The GBW07126 is a certified reference material approved as state first-grade certified reference material (CRM) for basaltic analysis. This material was sampled from nonporphyritic basalt of Emeishan Basalt, Sichuan, China. The Emeishan Basalt0 is one of the famous basalts worldwide. The range of (element) abundance and the homogeneity of the basalt are applicable to quantity transformation in (instrumental) analysis. Chengdu University of Technology is in charge for the development. 19 laboratoies at home and abroad are involved in values determining of trace elements. Modern high precision analytic techniques (53.4% of total methods employed) are used to guarantee analized quantity. Reasonable data processing has certified 54 elements as standard values, 45 elements as reference values, and 9 elements (including precious and rare metals) as information values. The data are presented in graphs. The (minimum) intake of 40 mg for most elements, and that of 20 g for platinum group elements are (recommended) for use. The CRM has a broad application in trace quantity analysis.