A definitive RNAA method for determination of selenium in biological samples: uncertainty evaluation and assessment of degree of accuracy
This article describes work on the development of a highly accurate RNAA method for determination of selenium in biological samples. The analytical post-irradiation procedure is based on a combination of cation-exchange and extraction chromatography with final selective and quantitative fixation of...
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| Veröffentlicht in: | Accreditation and quality assurance 2008-08, Vol.13 (8), p.443-451 |
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| creator | Chajduk, Ewelina Polkowska-Motrenko, Halina Dybczyński, Rajmund S. |
| description | This article describes work on the development of a highly accurate RNAA method for determination of selenium in biological samples. The analytical post-irradiation procedure is based on a combination of cation-exchange and extraction chromatography with final selective and quantitative fixation of selenium on a column packed with 3,3′-diaminobenzidine (DAB) supported on Amberlite XAD4, followed by gamma-ray spectrometric measurement. The suitability and accuracy of the method was demonstrated by analysing CRMs with certified selenium content. The uncertainty budget for Se determination in standard reference material Peach Leaves NBS 1547 was estimated; the combined standard uncertainty was calculated as 1.7%. The described method fulfils all the criteria for definitive methods. It was subsequently used for determination of selenium in biological materials intended as new CRMs and proficiency test samples. |
| doi_str_mv | 10.1007/s00769-008-0377-7 |
| format | Article |
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The analytical post-irradiation procedure is based on a combination of cation-exchange and extraction chromatography with final selective and quantitative fixation of selenium on a column packed with 3,3′-diaminobenzidine (DAB) supported on Amberlite XAD4, followed by gamma-ray spectrometric measurement. The suitability and accuracy of the method was demonstrated by analysing CRMs with certified selenium content. The uncertainty budget for Se determination in standard reference material Peach Leaves NBS 1547 was estimated; the combined standard uncertainty was calculated as 1.7%. The described method fulfils all the criteria for definitive methods. 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| subjects | Accuracy Amberlite (trademark) Analytical Chemistry Biochemistry Biological materials Biological properties Cation exchanging Certification Chemistry Chemistry and Materials Science Chromatographic methods and physical methods associated with chromatography Chromatography Commercial Law Disease Ecotoxicology Exact sciences and technology Food Science Gamma rays General Paper Laboratories Marketing Methods Microwaves Nuclear chemistry Nuclear reactors Other chromatographic methods Prunus Radiochemical methods Reagents Selenium Spectrometry Uncertainty |
| title | A definitive RNAA method for determination of selenium in biological samples: uncertainty evaluation and assessment of degree of accuracy |
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