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Original title:
Stability of the sodium content in selected botanical reference materials
Authors: Kameník, Jan ; Kučera, Jan ; Borovička, Jan ; Havránek, Vladimír
Document type: Papers
Conference/Event: Referenční materiály a mezilaboratorní porovnávání zkoušek VII., Lednice (CZ), 20181105
Year: 2018
Language: eng
Abstract: Sodium mass fractions in NIST standard reference materials (SRM) SRM 1547 Peach Leaves and SRM 1515 Apple leaves determined by INAA in our laboratory in recent years has been higher than the certified values. Similarly, increased values were published for SRM 1547 by several other laboratories. The increased Na mass fractions was found also for freshly opened SRM 1547 bottle and for material originating from a different lab. Increased Na mass fractions were confirmed by ICP-MS analysis of both materials. Analysis of archived samples revealed that sodium mass fraction in materials stored in polyethylene capsules is in agreement with the certified values. The sodium content in the glass of SRM 1547 bottle was roughly 10 %. Direct measurement of the Na depth profile by micro-PIXE was not indicative whether Na is released, i.g., by a glass corrosion due to residual humidity in the botanical material. However, a model experiment with freshly prepared and pulverized peach leaves demonstrated that such a scenario is possible for leaf-based materials. Although the study was focused on two NIST materials, the process is possible for any material with rather low Na content.
Keywords: analysis; methods; standard reference materials
Project no.: GBP108/12/G108 (CEP)
Funding provider: GA ČR
Host item entry: Sborník přednášek 7. ročníku Referenční materiály a mezilaboratorní porovnávání zkoušek, ISBN 978-80-86380-98-8
Institution: Nuclear Physics Institute AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0293256
Permalink: http://www.nusl.cz/ntk/nusl-391597
The record appears in these collections:
Research > Institutes ASCR > Nuclear Physics Institute
Conference materials > Papers
Authors: Kameník, Jan ; Kučera, Jan ; Borovička, Jan ; Havránek, Vladimír
Document type: Papers
Conference/Event: Referenční materiály a mezilaboratorní porovnávání zkoušek VII., Lednice (CZ), 20181105
Year: 2018
Language: eng
Abstract: Sodium mass fractions in NIST standard reference materials (SRM) SRM 1547 Peach Leaves and SRM 1515 Apple leaves determined by INAA in our laboratory in recent years has been higher than the certified values. Similarly, increased values were published for SRM 1547 by several other laboratories. The increased Na mass fractions was found also for freshly opened SRM 1547 bottle and for material originating from a different lab. Increased Na mass fractions were confirmed by ICP-MS analysis of both materials. Analysis of archived samples revealed that sodium mass fraction in materials stored in polyethylene capsules is in agreement with the certified values. The sodium content in the glass of SRM 1547 bottle was roughly 10 %. Direct measurement of the Na depth profile by micro-PIXE was not indicative whether Na is released, i.g., by a glass corrosion due to residual humidity in the botanical material. However, a model experiment with freshly prepared and pulverized peach leaves demonstrated that such a scenario is possible for leaf-based materials. Although the study was focused on two NIST materials, the process is possible for any material with rather low Na content.
Keywords: analysis; methods; standard reference materials
Project no.: GBP108/12/G108 (CEP)
Funding provider: GA ČR
Host item entry: Sborník přednášek 7. ročníku Referenční materiály a mezilaboratorní porovnávání zkoušek, ISBN 978-80-86380-98-8
Institution: Nuclear Physics Institute AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0293256
Permalink: http://www.nusl.cz/ntk/nusl-391597
The record appears in these collections:
Research > Institutes ASCR > Nuclear Physics Institute
Conference materials > Papers
Record created 2019-02-13, last modified 2023-12-06