دورية أكاديمية
Prenormative verification and validation of a protocol for measuring magnetite-maghemite ratios in magnetic nanoparticles
| العنوان: | Prenormative verification and validation of a protocol for measuring magnetite-maghemite ratios in magnetic nanoparticles |
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| المؤلفون: | Bogart, Lara K., Fock, Jeppe, da Costa, Geraldo M, Witte, Kerstin, Greneche, Jean-Marc, Zukrowski, Jan, Sikora, Marcin, Latta, Drew E., Scherer, Michelle M., Hansen, Mikkel Fougt, Frandsen, Cathrine, London, University |
| المصدر: | Bogart , L K , Fock , J , da Costa , G M , Witte , K , Greneche , J-M , Zukrowski , J , Sikora , M , Latta , D E , Scherer , M M , Hansen , M F , Frandsen , C & London , U 2022 , ' Prenormative verification and validation of a protocol for measuring magnetite-maghemite ratios in magnetic nanoparticles ' , Metrologia , vol. 59 , no. 1 , 015001 . https://doi.org/10.1088/1681-7575/ac36b6Test |
| سنة النشر: | 2022 |
| المجموعة: | Technical University of Denmark: DTU Orbit / Danmarks Tekniske Universitet |
| مصطلحات موضوعية: | Magnetic nanoparticles, 57Fe Mössbauer spectrometry, Iron oxide |
| الوصف: | An important step in establishing any new metrological method is a prenormative interlaboratory study, designed to verify and validate the method against its stated aims. Here, the Fe-57 Mossbauer spectrometric 'centre of gravity' (COG) method was tested as a means of quantifying the magnetite/maghemite (Fe 3 O 4 /γ-Fe 2 O 3 ) composition ratio in biphasic magnetic nanoparticles. The study involved seven laboratories across Europe and North and South America, and six samples-a verification set of three microcrystalline mixtures of known composition, and a validation set of three nanoparticle samples of unknown composition. The spectra were analysed by each participant using in-house fitting packages, and ex post facto by a single operator using an independent package. Repeatability analysis was performed using Mandel's h statistic and modified Youden plots. It is shown that almost all (83/84) of the Mandel h statistic values fall within the 0.5% significance level, with the one exception being borderline. Youden-based pairwise analysis indicates the dominance of random uncertainties; and in almost all cases the data analysis phase is only a minor contributor to the overall measurement uncertainty. It is concluded that the COG method is a robust and promising candidate for its intended purpose. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| العلاقة: | https://orbit.dtu.dk/en/publications/ffb0eb66-7d37-42c0-ad48-b4856aacb7e9Test |
| DOI: | 10.1088/1681-7575/ac36b6 |
| الإتاحة: | https://doi.org/10.1088/1681-7575/ac36b6Test https://orbit.dtu.dk/en/publications/ffb0eb66-7d37-42c0-ad48-b4856aacb7e9Test https://backend.orbit.dtu.dk/ws/files/267930207/Bogart_2022_Metrologia_59_015001.pdfTest |
| حقوق: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.5EA7EE11 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1088/1681-7575/ac36b6 |
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