Stone S F, Koster B J, Zeisler R
Center for Analytical Chemistry, National Institute of Standards and Technology, Gaithersburg, MD 20899.
Biol Trace Elem Res. 1990 Jul-Dec;26-27:579-87. doi: 10.1007/BF02992714.
The National Institute of Standards and Technology has developed a new Standard Reference Material 1941, "Organics in Marine Sediment." In addition to the organic constituents, over 30 elements have been determined by instrumental neutron activation analysis and prompt-gamma activation analysis. The homogeneity of the material was investigated and relative standard deviations of single-element concentrations in 250-mg samples were found to be 1% or less with regard to major inorganic constituents and rare earth elements. A slightly higher relative SD was found for elements that may stem from biological or anthropogenic input. The element concentrations determined in this work are discussed in comparison to concentrations in other similar reference materials. Concentrations for 31 elements will be included for information on the certificate.
美国国家标准与技术研究院开发了一种新的标准参考物质1941“海洋沉积物中的有机物”。除了有机成分外，还通过仪器中子活化分析和瞬发伽马活化分析测定了30多种元素。研究了该物质的均匀性，发现250毫克样品中主要无机成分和稀土元素的单元素浓度相对标准偏差为1%或更低。对于可能源于生物或人为输入的元素，相对标准偏差略高。将这项工作中测定的元素浓度与其他类似参考物质中的浓度进行了比较讨论。证书上将会列出31种元素的浓度以供参考。
