natural matrix certified materials
Spanish translation: materiales certificados de matriz natural
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| 02:08 Jul 15, 2015 |
| English to Spanish translations [PRO] Science - Biology (-tech,-chem,micro-) / biochemistry | |||||||
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|  Selected response from: Marcelo Viera Uruguay Local time: 12:20 | ||||||
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1 hr confidence: 
materiales certificados de matriz natural Explanation: Sample preparation Detailed sample preparation depends on the type of material. Pure standards are most likely to be prepared by chemical synthesis and purification and characterized by determination of remaining impurities.[1] This is often done by commercial producers. Natural matrix CRMs (often shortened to 'matrix CRMs') contain an analyte or analytes in a natural sample (for, example, lead in fish tissue). These are typically produced by homogenization of a naturally occurring material followed by measurement of each analyte. Due to the difficulty in production and value assignment, these are usually produced by national or transnational metrology institutes like NIST (USA), BAM (Germany), KRISS (Korea) and IRMM (Joint Research Centre European Commission). https://en.wikipedia.org/wiki/Certified_reference_materials https://books.google.com.uy/books?id=LaV8Q_UYZW0C&pg=PA163&l... -------------------------------------------------- Note added at 3 hrs (2015-07-15 05:36:24 GMT) -------------------------------------------------- Certified Reference Materials may be natural matrix reference materials, “pure chemical substance” chemical materials (or their solutions) or physical or biological standard materials. The use of matrix CRMs provides comprehensive information about a method system. When matrix CRMs are used for method development, the analyst has an excellent tool to optimize the performance of the method system. Matrix CRMs with analyte levels in a range appropriate to the method and typical samples may be used to assess and establish method performance characteristics, such as accuracy, bias, limit of quantitation and uncertainty estimates as part of the method validation process. This class of RMs is useful for method implementation verification when methods are transferred or as part of routine method performance control. __ http://www.aoac.org/imis15_prod/Programs/RMG_files/Page599.h... -------------------------------------------------- Note added at 3 hrs (2015-07-15 05:40:57 GMT) -------------------------------------------------- The International Atomic Energy Agency maintains a database on internationally available certified reference materials of natural origin. The database was updated in 1998 and prepared for an Internet implementation. A user-friendly structure was created, providing two main pathways for browsing, either according to the matrix classification or the producer's name. http://www.ncbi.nlm.nih.gov/pubmed/10676478 También denominados Materiales de referencia certificados de matrix natural. https://en.wikipedia.org/wiki/Certified_reference_materials |
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