长江底泥国家标准物质研制

Preparation of Sediment National Standard Reference of Yangtze River

研制了长江底泥和洪湖底泥3个沉积物标准物质,首次采用流化床气流粉碎技术细碎样品,均匀性和稳定性达到一级标准物质技术规范要求。采用了等离子光谱、等离子质谱、中子活化等多种方法,分析测试并定值了标准物质中主、次量元素,稀土元素和痕量元素共77种元素(组分)的标准值和参考值,已批准为国家一级标准物质(GBW07431-GBW07433)公开发行。

The paper studies three kinds of sediment standard reference of Yangtze River and Honghu Lake, uses grinding technology of fluidized flow to crush sample. Homogeneity and stability achieve technical norm of primary reference mate- rial. Using plasma spectroscopy, plasma mass spectrometry and neutron activation, the paper tests standard values and ref- erence values of 77elements（components） including major and minor elements, rare earth elements and trace element, which have been approved as National Standard Reference Materials（GBW07431-GBW07433） in public circulation.