A definitive method for the determination of small amounts of copper in biological materials by neutron activation analysis

Dybczyński, R.; Wasek, M.; Maleszewska, H.

doi:10.1007/bf02041356

Cited by 23 publications

(5 citation statements)

References 16 publications

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“…> 1, F 0.05 critical value of the Fisher's test at significance level α=0.05 and degrees of freedom: (De Bievre 1993;Vogl 2007). The other methods of similar metrological quality which can be used in the field of trace analysis are ratio primary reference measurement procedures (RPRMP) or definitive methods based on radiochemical neutron activation analysis (RNAA) (Dybczyński et al 1989b(Dybczyński et al , 2007(Dybczyński et al , 2014Dybczyński 1997Dybczyński , 2015. The essence of these methods is the combination of neutron activation with the post-irradiation selective and quantitative isolation of the desired radionuclide by column chromatography followed by γ-ray spectrometric measurement.…”

Section: Ms A(w) Ms W(a)mentioning

confidence: 99%

Preparation of Three New Certified Reference Materials for Food and Environmental Analysis and Certification Using Laboratory Intercomparison as well as Primary Reference Measurement Procedures

et al. 2021

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Three new reference materials: MODAS-3 Herring Tissue (M-3 HerTis), MODAS-4 Cormorant Tissue (M-4 CormTis), and MODAS-5 Cod Tissue (M-5 CodTis) were prepared and certified on the basis of results of a worldwide intercomparison exercise. Independently of our proven method of establishing the certified and information values, the content of several essential and toxic elements was additionally determined by the use of ratio primary reference measurement procedures (definitive methods) based on radiochemical neutron activation analysis (RNAA) in the case of As, Cd, Co, Cr, Fe, Mo, Se, and U and isotope dilution mass spectrometry (IDMS) in the case of Hg, respectively. Good agreement of the established certified values and the results obtained by ratio primary reference measurement procedures confirmed the validity of the certification procedure. The total number of elements which could be certified amounted to 30, 21, 18 in M-3 HerTis, M-4 CormTis, and M-5 CodTis, respectively. The relative frequency of use of individual analytical techniques in this intercomparison campaign was calculated and discussed. Inductively coupled plasma mass spectrometry (ICP-MS) is now a dominant technique, followed by atomic absorption spectroscopy (AAS), NAA, and emission spectroscopy (ES). The decreasing share of NAA as compared to several earlier intercomparison exercises should be noticed. NAA is the only method in the array of highly sensitive methods of inorganic trace analysis, which is essentially free from blank. The lack of this method in the foreseeable future may be an obstacle in the prospective certification campaigns and may endanger the implementation of quality assurance in trace analysis.

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Section: Ms A(w) Ms W(a)mentioning

confidence: 99%

Preparation of Three New Certified Reference Materials for Food and Environmental Analysis and Certification Using Laboratory Intercomparison as well as Primary Reference Measurement Procedures

et al. 2021

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“…The principal idea is the combination of neutron activation with selective and quantitative isolation of the desired radionuclide by column chromatography followed by γ-ray spectrometric measurement. Several rules which should be obeyed when devising such methods were formulated [26][27][28]. The definition of "definitive methods" formulated by Uriano and Gravatt [29] sounded: "Definitive methods of chemical analysis are those that have a valid and well described theoretical foundation, have been experimentally evaluated so that reported results have negligible systematic errors, and have high levels of precision.".…”

Section: Ratio Primary Reference Measurement Procedures (Rprmp): Defimentioning

confidence: 99%

The role of NAA in securing the accuracy of analytical results in the inorganic trace analysis

Dybczyński

2019

J Radioanal Nucl Chem

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The unique value of the neutron activation analysis (NAA) for analytical quality assurance is demonstrated through its contribution to the certification of the reference materials over the time span of 40 years. Ratio primary reference measurement procedures i.e. definitive methods, based on radiochemical NAA, play an important role in confirming the validity of the certified values established in the international intercomparisons. Real analytical situations where the use of NAA was critical to get accurate results are presented. The dangers associated with the possible non-availability of the NAA in the near future are indicated.

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“…They are based on quantitative and selective postirradiation radiochemical separation of the analyte of interest using ion exchange chromatography and/or extraction chromatography followed by gamma-ray spectrometric measurement [50–54]. The results of the determination of As and Cd by RPRMP (not included into the population of laboratory data) were applied for verification of the certified values cf.…”

Section: Certification Of the Materialsmentioning

confidence: 99%

“…The ratio primary reference measurement procedures (RPRMP) (definitive methods) with the highest metrological properties were developed in the Institute of Nuclear Chemistry and Technology [ 45 – 54 ]. They are based on quantitative and selective postirradiation radiochemical separation of the analyte of interest using ion exchange chromatography and/or extraction chromatography followed by gamma-ray spectrometric measurement [ 50 – 54 ]. The results of the determination of As and Cd by RPRMP (not included into the population of laboratory data) were applied for verification of the certified values cf.…”

Section: Certification Of the Materialsmentioning

confidence: 99%

Two New Reference Materials Based on Tobacco Leaves: Certification for over a Dozen of Toxic and Essential Elements

Samczyński

Dybczyński

Polkowska-Motrenko

et al. 2012

The Scientific World Journal

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The preparation, certification, and characterization of two new biological certified reference materials for inorganic trace analysis have been presented. They are based on two different varieties of tobacco leaves, namely, Oriental Basma Tobacco Leaves (INCT-OBTL-5), grown in Greece, and Polish Virginia Tobacco Leaves (INCT-PVTL-6), grown in Poland. Certification of the materials was based on the statistical evaluation of results obtained in a worldwide interlaboratory comparison, in which 87 laboratories from 18 countries participated, providing 2568 laboratory averages on nearly 80 elements. It was possible to establish the certified values of concentration for many elements in the new materials, that is, 37 in INCT-OBTL-5 and 36 in INCT-PVTL-6, including several toxic ones like As, Cd, Hg, Pb, and so forth. The share and the role of instrumental analytical techniques used in the process of certification of the new CRMs are discussed.

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A definitive method for the determination of small amounts of copper in biological materials by neutron activation analysis

Cited by 23 publications

References 16 publications

Preparation of Three New Certified Reference Materials for Food and Environmental Analysis and Certification Using Laboratory Intercomparison as well as Primary Reference Measurement Procedures

Preparation of Three New Certified Reference Materials for Food and Environmental Analysis and Certification Using Laboratory Intercomparison as well as Primary Reference Measurement Procedures

The role of NAA in securing the accuracy of analytical results in the inorganic trace analysis

Two New Reference Materials Based on Tobacco Leaves: Certification for over a Dozen of Toxic and Essential Elements

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