共查询到20条相似文献,搜索用时 93 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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针对分析人员对标准物质概念不清、使用不规范等问题,就环境监测领域标准物质选择和应用方法做了梳理。从标准物质的概念、区分有证和非有证标准物质的方法、标准物质的应用范围及标准物质的使用注意事项等4个方面系统地进行了梳理,重点阐述了有证标准物质和非有证标准物质的概念区别及使用时的误区,为分析人员在实际工作中出具准确数据提供理论依据。 相似文献
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阐述了我国标准物质的分类、分级、编号及其管理。描述了标准物质的溯淅体系及定值的组织系统,介绍了国际标准物质信息库。 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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ISO/REMCO关于标准物质的新定义 总被引:1,自引:0,他引:1
对"标准物质(RM)"和"有证标准物质(CRM)"术语进行进一步的解释和说明,以帮助读者对标准物质的定义有正确的理解. 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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应用^1H-NMR技术对系列丁腈橡胶(BNR)标准物质的结构进行了表征。测定也丁腈橡胶标准物质中聚丁二烯链段中的顺式和反式结构含量、聚丁二烯链段中1,4加成聚合与1,2,加成聚合的呈以及丁腈橡胶标准物质中结合丙烯腈的含量。 相似文献
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Sharpless KE Greenberg RR Schantz MM Welch MJ Wise SA Ihnat M 《Analytical and bioanalytical chemistry》2004,378(5):1161-1167
Well-characterized reference materials are needed by laboratories in the food testing and nutrition communities to facilitate compliance with nutritional labeling laws, to provide traceability for food exports needed for acceptance in many foreign markets, and to improve the accuracy of nutrition information that is provided to assist consumers in making sound dietary choices. As a result of the enactment of the Nutrition Labeling and Education Act of 1990 and the Infant Formula Act of 1980, the National Institute of Standards and Technology (NIST) has developed a suite of food-matrix Standard Reference Materials (SRMs) characterized for nutrient concentrations. These include SRM 1544 Fatty Acids and Cholesterol in a Frozen Diet Composite, SRM 1546 Meat Homogenate, SRM 1548a Typical Diet, SRM 1566b Oyster Tissue, SRM 1846 Infant Formula, SRM 1946 Lake Superior Fish Tissue, SRM 2383 Baby Food Composite, SRM 2384 Baking Chocolate, SRM 2385 Spinach, and SRM 2387 Peanut Butter. Many of these materials were developed at the request of the food industry to populate a nine-sectored fat-protein-carbohydrate triangle developed by AOAC International. With the completion of SRM 2387, SRMs representing each sector of the triangle are now available. These food-matrix reference materials are intended primarily for validation of analytical methods for the measurement of proximates, fatty acids, vitamins, minerals, and so on in foods of similar composition. They may also be used as "primary control materials" in the value-assignment of in-house, secondary, control materials to confirm accuracy as well as to establish traceability to NIST. 相似文献
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Yoshitaka Shimizu Yoko Ohte Xinnu Bao Satoko Otsuka Yuko Kitamaki Keiichiro Ishikawa Toshihide Ihara Kenji Kato 《Accreditation and quality assurance》2008,13(7):389-396
For accurate measurement of concentrations of substances by instrumental analysis, reliable calibration standards are needed.
In Japan, national reference materials are supplied under the national standards dissemination system named the Japan Calibration
Service System (JCSS). In JCSS, calibration standards for the analysis of environmental pollutants are supplied. For the traceability
to the SI of reference materials for calibration in JCSS, the National Metrology Institute of Japan (NMIJ) is developing high-purity
reference materials of volatile organic compounds (VOCs) as NMIJ CRMs. The freezing-point depression method, which has potential
as a primary method of measurement, is employed for the determination of property value. In this paper, a development scheme
of certified reference materials of high-purity VOCs is described.
Presented at BERM-11, October 2007, Tsukuba, Japan. 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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Stapleton HM Keller JM Schantz MM Kucklick JR Leigh SD Wise SA 《Analytical and bioanalytical chemistry》2007,387(7):2365-2379
Standard reference materials (SRMs) are valuable tools in developing and validating analytical methods to improve quality
assurance standards. The National Institute of Standards and Technology (NIST) has a long history of providing environmental
SRMs with certified concentrations of organic and inorganic contaminants. Here we report on new certified and reference concentrations
for 27 polybrominated diphenyl ether (PBDE) congeners in seven different SRMs: cod-liver oil, whale blubber, fish tissue (two
materials), mussel tissue and sediment (two materials). PBDEs were measured in these SRMs, with the lowest concentrations
measured in mussel tissue (SRM 1974b) and the highest in sediment collected from the New York/New Jersey Waterway (SRM 1944).
Comparing the relative PBDE congener concentrations within the samples, we found the biota SRMs contained primarily tetrabrominated
and pentabrominated diphenyl ethers, whereas the sediment SRMs contained primarily decabromodiphenyl ether (BDE 209). The
cod-liver oil (SRM 1588b) and whale blubber (SRM 1945) materials were also found to contain measurable concentrations of two
methoxylated PBDEs (MeO-BDEs). Certified and reference concentrations are reported for 12 PBDE congeners measured in the biota
SRMs and reference values are available for two MeO-BDEs. Results from a sediment interlaboratory comparison PBDE exercise
are available for the two sediment SRMs (1941b and 1944). 相似文献
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The facilities of the Institute for Reference Materials and Measurements for the preparation of biological and environmental reference materials are discussed under the aspect of satisfying important parameters for the preparation of candidate reference materials. The choice of transformation methods and their possible influences on quality and long-term conservation, the need for automation as well as the importance of quality control are particularly emphasized. 相似文献
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萤石是一种重要的战略性非金属矿产资源,本文对中国国家标准、行业标准、国际标准(ISO)、美国标准(ASTM)以及俄罗斯标准(GOST)中的萤石成分分析标准方法的现状进行了介绍。对近年来X射线荧光光谱法(XRF)、电感耦合等离子体发射光谱法(ICP-AES)、电感耦合等离子体质谱法(ICP-MS)、激光诱导击穿光谱法(LIBS)等技术在萤石成分分析中的应用以及标准物质/标准样品研制情况进行了总结和评述。文章认为,萤石分析测试技术标准体系相对完备,XRF、ICP-AES、ICP-MS等仪器分析测试技术已普遍应用于萤石样品实验室分析,建议尽快研究并建立萤石中稀土等微量元素测定的标准方法,并开展相应标准物质/标准样品的研制,同时应大力开展原位在线分析技术的研究与开发,以适应工业在线自动化监测的需求,LIBS与在线XRF技术联合在萤石在线分析方面具有良好的应用潜力。 相似文献
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Pirjo Sainio Irma Mäkinen Jaap-Willem Hutter Theo den Ouden Mikael Krysell 《Accreditation and quality assurance》2006,11(3):116-121
The international joint project HYCREF (Contract No. G6RD-CT-2002-00854), funded by the European Commission in the 5th Framework programme, aimed to develop methods to prepare homogeneous and stable reference materials of water, soil, and waste contaminated with mineral oil hydrocarbons and to certify the mineral oil content by gas chromatographic methods. The results of a feasibility study for the preparation of three soil reference materials are discussed in this paper, and for the preparation of three waste reference materials in the second part (Koch et al., Accred Qual Assur submitted for publication). The soil materials were selected to represent different soil types and contamination levels. The project plan set three requirements for these reference materials: uncertainty in the mineral oil content resulting from the certification exercise <5%, a sample inhomogeneity of <3% and a minimum long-term stability of 5 years. For the most part, these requirements were met within this project. 相似文献