共查询到20条相似文献,搜索用时 171 毫秒
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正确使用标准物质/标准样品 总被引:2,自引:0,他引:2
介绍了标准物质与标准样品、有证与非有证标准物质/标准样品的区别与联系,国內外有证标准物质/标准样品的判断依据,标准物质/标准样品及其证书的科学使用。对正确理解和使用标准物质/标准样品提出了一些建议。 相似文献
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《中国无机分析化学》2015,(2):4
<正>中国航空工业集团公司北京航空材料研究院检测研究中心从事研制标准物质已有四十多年历史,共研制出具有航空材料特色的标准物质90余种,标准物质种类涉及铝合金、钛合金、镁合金、高温合金等。所研制的标准物质应用在航空、航天、船舶、兵器等各行业,深受用户好评。自产的标准物质主要有:镍基、铁镍基高温合金化学、光谱、痕量、气体标准物质;铝合金化学、光谱、气体标准物质;钛合金化学、光谱、气体标准物质;稀土镁合金化学标准物质等。为了满足客户需求,还销售国内外生产的各种合金的化学、光谱、气体标准物质、各种单元素和复 相似文献
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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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《分析测试技术与仪器》2001,(2):104-104
标准物质可按其被定值的特性进行分类 .根据标准物质管理办法的规定 ,标准物质管理可分为化学成分标准物质 (其中包括冶金、环境分析、化工等标准物质 ) ,物理或物理化学性质标准物质 (其中包括光学、磁学、酸度、电导等标准物质 ) ,以及工程特性标准物质 (其中包括粒度、橡胶耐磨性、表面粗糙度等标准物质 ) .我国将标准物质分为一级和二级 .一级标准物质采用绝对测量法或两种以上不同原理的准确可靠的方法定值 ,不确定度具有国内最高水平 ,均匀性良好 ,稳定性在一年以上 .二级标准物质采用与一级标准物质进行比较测量的方法或一级标准物质… 相似文献
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介绍钨合金标准物质的研制过程,实验结果表明该标准物质的均匀性、稳定性良好,定值准确可靠,符合JJG1006《一级标准物质技术规范》的要求。 相似文献
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介绍了ZnAl_(4-1)锌合金标准物质的制备技术和研制过程。并以大量数据表明所研制的ZnAl_(4-1)光谱和化学两种标准物质都具有良好的均匀性和稳定性、定值准确可靠、符合国家一级标准物质的技术要求,达到了美国NIST同类标准物质的先进水平。 相似文献
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对稀土镁铸铁光谱分析用标准物质的制备、分析定值及应用进行了系统研究。研制了我国第一套稀土镁铸铁光谱分析用标准物质,确定了14个项目的标准定值,该系列标准物质有良好的均匀性,其化学成分呈梯度分布,线性关系良好。 相似文献
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采用一种新的X射线荧光UNIQUANT软件分析方法,分析了土壤标准物质和未知样品,土壤标准物质的分析结果与标准值较吻合,除氧化钠和氧化镁的相对偏差较高外,其余氧化物的相对偏差在0~10%之间。 相似文献
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S N Willie 《Fresenius' Journal of Analytical Chemistry》2001,370(2-3):131-133
The environmental CRMs currently available from NRC Ottawa comprise four natural waters for trace elements, four biological tissues for trace elements and methylmercury, three marine sediments for major and trace elements (one sediment has certified values for butyltins) and one fish tissue for organochlorines (PCBs, dioxins). Although significant effort has been expended to maintain this suite of materials, several new initiatives have also recently been completed or are in progress. The certified value for arsenobetaine in Dogfish Muscle CRM DORM-2 has been established. The certification approaches, as well as the studies to determine extraction efficiency of this organoarsenic compound, are presented. A stability study has been completed for Hg in a natural water sample and plans are underway for production of a CRM. Assessment of micronutrient stability in seawater for the purposes of CRM production is continuing and progress on this initiative is discussed. 相似文献
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Scott N. Willie 《Analytical and bioanalytical chemistry》2001,370(2-3):131-133
The environmental CRMs currently available from NRC Ottawa comprise four natural waters for trace elements, four biological tissues for trace elements and methylmercury, three marine sediments for major and trace elements (one sediment has certified values for butyltins) and one fish tissue for organochlorines (PCBs, dioxins). Although significant effort has been expended to maintain this suite of materials, several new initiatives have also recently been completed or are in progress. The certified value for arsenobetaine in Dogfish Muscle CRM DORM-2 has been established. The certification approaches, as well as the studies to determine extraction efficiency of this organoarsenic compound, are presented. A stability study has been completed for Hg in a natural water sample and plans are underway for production of a CRM. Assessment of micronutrient stability in seawater for the purposes of CRM production is continuing and progress on this initiative is discussed. 相似文献