共查询到17条相似文献,搜索用时 109 毫秒
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编者收集整理了当今地质分析所用的标准物质647个,按其特征和不同应用分成6个部分介绍,即元素整体分析标准物质、超细粒度标准物质、化学物相和元素形态分析标准物质、微区原位分析标准物质、同位素及地质年代学分析标准物质、有机污染物分析标准物质。为了适应不同的查找方式,手册中有4种表格提供查找(综合信息表、定值信息表、定值数据简表、特性量值索引)。 相似文献
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煤、焦炭标准物质的稳定性考察及评价 总被引:1,自引:1,他引:1
介绍了影响煤、焦炭标准物质稳定性的因素,以实际煤、焦炭标准物质为例,考察了煤、焦炭标准物质的稳定性,介绍了评价煤、焦炭标准物质稳定性的方法,提出了保证煤、焦炭标准物质稳定性的措施。 相似文献
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不少标准物质缺少有效期标示,标准物质经营单位往往不提供标准物质生产单位的生产许可征,这给企业的标准物质验收工作带来了困难。国家应建立、健全计量法规,并采取有效措施保证标准物质的生产及经营实现标准化和规范化。 相似文献
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对地质分析时使用标准物质的一般原则、容易忽略的问题、贵金属标准物质的选择、过期标准物质的选择、疑难样品“标准物质室”的建立、仪器期间核查标准物质的选择进行了论述。 相似文献
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对一级军用标准物质JBWY05901钨合金标准物质稳定性检验的化学分析方法进行了比较选择,提出了该标准物质稳定性检验方法,给出了检验数据的统计处理方法及稳定性检验结果。 相似文献
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从煤质材料、生产制备工艺方面介绍了影响煤、焦炭标准样品物理化学特性稳定性的因素,以实际煤、焦炭国家标准样品为例,考察了煤、焦炭标准样品物理化学特性值的稳定性,介绍了煤、焦炭标准样品稳定性评价的方法.根据稳定性考察结果,提出了保证煤、焦炭标准样品物理化学特性稳定性的措施. 相似文献
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阐述了煤及焦炭标准样品的发展概况,通过对国内外煤及焦炭标准样品的种类、技术性能指标等方面进行比较,指出了煤及焦炭标准样品的变化动态与发展趋势。 相似文献
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经过几代人的共同努力,我国的冶金标准物质已经达到了相当高的水平。品种齐全、数量充足、质量上接近或达到了世界先进水平。本文从八个方面论述了冶金标准物质对冶金科学技术的发展、冶金产品及其品种和质量的提高所发挥的重要作用。冶金科学技术和现代分析技术的发展又推动了冶金标准物质的发展。用统一、提高、拓宽六个字可概括九十年代冶金标准物质的发展趋势。 相似文献
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Fit-for-purpose shellfish reference materials for internal and external quality control in the analysis of phycotoxins 总被引:1,自引:0,他引:1
The need for reference materials for quality control of analysis of foodstuffs has been stressed frequently. This has been
particularly true in the phycotoxins field, where there is a great shortage of both pure calibration standards and reference
materials. Worldwide there are very few independent bodies that produce certified reference materials for phycotoxins, the
main producers currently being the National Research Council Canada and the Japanese Food Research Laboratory. Limited availability
of contaminated shellfish and algae, as well as the time and knowledge necessary for the production of adequate reference
materials, continuously lead to limited editions of certified reference materials and even more limited production of in-house
reference materials. The restricted availability of in-house quality control materials promotes the rapid use of the limited
certified reference materials, which in turn hampers the production of the suite of materials required globally for complete
protection of public health. This paper outlines the various options that analysts can pursue in the use of reference materials
for internal and external quality control, with a view to optimising the efforts of both reference materials users and reference
materials producers. For this purpose, the logical sequence is reviewed from the discovery of a new bioactive compound in
shellfish, through initial method development up to regulation for food safety purposes including accepted reference methods.
Subsequently, the requirements for and efforts typically spent in the production and characterisation of laboratory reference
materials, certified reference materials and other test materials used in inter-laboratory studies or proficiency testing,
in the area of marine biotoxins are evaluated. Particular emphasis is put on practical advice for the preparation of in-house
reference materials. The intricate link between reference material characterisation and method performance is outlined to
give guidance on the appropriate in-house method validation in the rapidly developing field of phycotoxins.
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通过分析我国标准物质研究与应用的现状,简述了我国加入世界贸易组织后,搞好标准物质品牌运营的思路。 相似文献