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Publications (7 of 7) Show all publications
Delli Santi, M. G., Bartalini, S., Cancio, P., Galli, I., Giusfredi, G., Haraldsson, C., . . . De Natale, P. (2021). Biogenic Fraction Determination in Fuel Blends by Laser-Based 14CO2 Detection. Paper presented at 2021/02/04. Advanced Photonics Research, 2(3), Article ID 2000069.
Open this publication in new window or tab >>Biogenic Fraction Determination in Fuel Blends by Laser-Based 14CO2 Detection
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2021 (English)In: Advanced Photonics Research, ISSN 2699-9293, Vol. 2, no 3, article id 2000069Article in journal (Refereed) Published
Abstract [en]

A widespread use of biofuels is a key recommendation of the Paris Agreement and leading international organizations. It is an important step to mitigate the global warming effects due to greenhouse-gas emissions from fossil oils. To this aim, an analytical technique sufficiently cheap and compact, to foster its widespread adoption, is necessary. Herein, it is shown that a compact, laser-based spectrometer is suitable to replace the few established techniques, which have been used to quantify the biofraction in fuel blends, so far. Measurements of the biogenic fraction in different fuel samples are reported, with a precision of 1% in the whole range (0?100%) of possible blends, confirming a performance comparable to the best existing technique. An onsite-deployable saturated-absorption cavity ring-down (SCAR) spectrometer is used. The results demonstrate the potential of laser-based instrumentation to do the accurate and precise measurements required for the certification of biogenic content of any hydrocarbon-based material. Worldwide adoption of such laser-based technology for biofraction certification can significantly boost the market of biofuels and can prove to be a disruptive methodology for assessing the biogenic content in plastics and polymeric materials.

Place, publisher, year, edition, pages
John Wiley & Sons, Ltd, 2021
Keywords
biofuels, greenhouse-gas emissions mitigation, high-sensitivity spectroscopy, quantum cascade laser sensors, radiocarbon determination
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-52189 (URN)10.1002/adpr.202000069 (DOI)
Conference
2021/02/04
Available from: 2021-02-04 Created: 2021-02-04 Last updated: 2021-06-18Bibliographically approved
Roziková, M., Vičarová, M., Thirstrup, C., Dumańska, J., Gonzaga, F. B., da Cruz Cunha, K., . . . Smirnov, A. (2020). Electrolytic conductivity at pure water level final report. Metrologia, 58(1 A)
Open this publication in new window or tab >>Electrolytic conductivity at pure water level final report
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2020 (English)In: Metrologia, ISSN 0026-1394, E-ISSN 1681-7575, Vol. 58, no 1 AArticle in journal (Refereed) Published
Abstract [en]

Electrolytic conductivity in aqueous solutions is one of the most common electrochemical measurement techniques in industry. Since it is sensitive to the amount content of dissolved ions in a solution, a limiting value for conductivity is a clear and simple quality criterium for the ionic purity of water. The relevant measuring range for pure water applications is roughly between 0.055 μS cm-1 (ultrapure water) and 150 μS cm-1 at 25 °C. For instance, the European, Japanese and United States (USP) Pharmacopoeia have specified the requirements for purified water, highly purified water and water for injection for pharmaceutical use based on conductiv-ity. Sectors that also use conductivity limits for water purity are electrical power production, food industry, electronic industry and analytical laboratories. At low conductivity levels it is not feasible to circulate water samples for comparison measure-ments, since the conductivity value is instable due to inevitable ionic contamination. The main contamination results from carbon dioxide in ambient air that dissolves in water and builds H3O+ and hydrogen carbonate ions. The contribution of these ions to conductivity is around 1 μS cm-1. Hence, it is impossible to provide stable samples having usable uncertainties in the conductivity range of interest. EURAMET 1271, performed in 2013, was the first successful comparison measurement of pure water conductivity. In the meanwhile, more NMIs, the majority of which is situated in Europe, have built measurement capabilities in the pure water range. EURAMRET 1271 covered a measurement range up to 50 μS cm-1, whereas more and more customers request conductivity cell calibration in the range up to 150 μS cm-1. Consequently, this comparison intends to extend the measurement range and to enable more NMIs to get support for potential CMCs. Therefore, this comparison is additionally intended being a supplementary CCQM comparison. A commercial conductivity measurement meter, including a conductivity measurement cell, was used for the comparison in a Round-Robin scheme. The devices were provided by PTB and were sent from one institute to another. Each institute had to measure the conductivity of a reference solution using the conductivity meter. The reference solution could either be pure water or a measurement standard solution that was reasonably stable in the range of interest. In the first scheme, the cell had to be integrated in a closed pure water flow though system to minimize impurification by CO2. An adequate fixture for this setup was provided by PTB. In the second scheme, the cell was immersed into the measurement standard solution under tem-perature-controlled conditions. Essentially, the institutes had to report the conductivity values indicated by the conductivity meter and the conductivity reference value assigned to the water in the flow though system or that of the measurement standard solution, respectively. The co-ordinating institute calculated adjusted cell constants for the cell from the reported values, which were used to calculate linking conductivities, the actual quantities to be finally compared. The results showed good equivalence in all conductivity ranges, with only a few inconsistent values. Adequate comparison reference values are suggested that can serve to calculate robust degrees of equivalences for the participants usable to support respective CMC claims. 

Place, publisher, year, edition, pages
IOP Publishing Ltd, 2020
Keywords
Carbon dioxide, Cells, Cytology, Electric conductivity measurement, Electronics industry, Flow of water, Flowmeters, Ions, Laboratories, Purification, Water levels, Analytical laboratories, Comparison measurement, Conductivity measurements, Degrees of equivalence, Electrical power production, Electrochemical measurements, Electrolytic conductivity, Electronic industries, Solution mining
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-52045 (URN)10.1088/0026-1394/58/1A/08001 (DOI)2-s2.0-85099226930 (Scopus ID)
Available from: 2021-01-26 Created: 2021-01-26 Last updated: 2021-06-18Bibliographically approved
Wang, J., Chao, J., Wei, C., Li, H., Wang, Q., Song, P., . . . Migal, P. (2020). Final report of the CCQM-K145: Toxic and essential elements in bovine liver. Metrologia, 57(1 A), Article ID 08013.
Open this publication in new window or tab >>Final report of the CCQM-K145: Toxic and essential elements in bovine liver
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2020 (English)In: Metrologia, ISSN 0026-1394, E-ISSN 1681-7575, Vol. 57, no 1 A, article id 08013Article in journal (Refereed) Published
Abstract [en]

Liver plays a major role in metabolism and acts as a source of energy for the body by storing glycogen. With the growing interest and investigation in the biological effects in recent years, it is important and necessary to develop accurate and comparable analytical methods for elements in bio-samples. It has, however, been 10 years since the tissue sample (bovine liver) of CCQM-K49 key comparison. The purpose of CCQM-K145 is to ensure the comparable and traceable measurement results for essential and toxic elements such as P, S, Zn, Mn, Ni, Mo, Sr, Cr, Co, Pb, As and Hg in bovine liver among NMIs and other designated measurement bodies worldwide. The comparison was agreed by IAWG as 6th IAWG Benchmarking Exercise with Zn and Ni as exemplary elements at the meeting in Korea in the early October 2016. The results of CCQM-K145 are expected to cover the measurement capability and support CMCs claiming for inorganic elements in the similar biological tissue materials and food samples. 30 NMIs and DIs registered in CCQM-K145. With respect to the methodology, a variety of techniques such as IDMS, ICP-OES, ICP-MS(non-ID), AAS and NAA were adopted by the participants. For Zn, Ni, Sr, Pb and Hg measurements, most participants chose ID-ICP-MS method, which showed the better performance in terms of consistency and reliability of the measurement results. In aspect of the traceability for the measurement results in CCQM-K145, most participants used their own (in house) CRMs or other NMI's CRMs to guarantee trace to SI unit. Most participants used similar matrix CRMs for quality control or method validation. Base on different statistic way to calculate the reference mass fraction values and associated uncertainties for each measurand, removal of the suspected extreme values, and discussion at the IAWG meetings, the median values are proposed as the KCRV for Zn, Ni, Mn, Mo, Cr, Pb and Hg; the arithmetic mean values are proposed as the KCRV for P, S, Sr, Co and As. In general, the performances of the majority of CCQM-K145 participants are very good, illustrating their measurement capabilities for Zn, Ni, P, S, Mn, Mo, Sr, Cr, As, Co, Pb and Hg in a complex biological tissue matrix. Bovine liver contains many kinds of nutrients and microelements, it can be regarded as a typical representative material of biological tissue and food. In CCQM-K145, the analytes involved alkali metals and transition elements, metalloids/semi-metals and non metals with a range of mass fraction from mg/g to μg/kg. CCQM-K145 also tested the ability of NMIs/DIs to determine elements that were easy to be lost and polluted, and interfered significantly. The chemical pretreatment methods of samples used in the comparison is suitable for general food and biological matrix samples. A variety of measurement methods used in the comparison represent the main instrumental technology for elemental analysis. Therefore, for supporting CMC claim, CCQM-K145 is readily applicable to measurement of more elements in a wide range of biological materials (including liquids and solids) and meat products. Main text To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/. The final report has been peer-reviewed and approved for publication by the CCQM, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).

Place, publisher, year, edition, pages
IOP Publishing Ltd, 2020
Keywords
Alkali metals, Chemical analysis, Inductively coupled plasma mass spectrometry, Mammals, Mass spectrometers, Mercury compounds, Quality control, Biological matrixes, Chemical pre-treatment, Essential elements, Inorganic elements, Key comparison database, Measurement methods, Mutual recognition arrangements, Transition element, Tissue
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-51499 (URN)10.1088/0026-1394/57/1A/08013 (DOI)2-s2.0-85091407379 (Scopus ID)
Available from: 2021-01-11 Created: 2021-01-11 Last updated: 2021-06-18Bibliographically approved
Medvedevskikh, M., Krasheninina, M., Rego, E. C. P., Wollinger, W., Monteiro, T. M., Carvalho, L. J. D., . . . Samuel, L. (2017). Report of the CCQM-K130: Nitrogen mass fraction measurements in glycine. Metrologia, 54(1A)
Open this publication in new window or tab >>Report of the CCQM-K130: Nitrogen mass fraction measurements in glycine
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2017 (English)In: Metrologia, ISSN 0026-1394, E-ISSN 1681-7575, Vol. 54, no 1AArticle in journal (Refereed) Published
Abstract [en]

Mass fraction of nitrogen is very important pointer because the results of these measurements are often used for determination of protein mass fraction that is an important indicator of the quality of the vast majority of food products and raw materials, in particular dry milk powder. Proteins-enzymes catalyze chemical reactions, protein along with fats and carbohydrates is one of the indicators characterizing the energy value of food, so its definition is mandatory for all food products. The aim of this key comparison CCQM-K130 and pilot study P166 is to support National Measurement Institutes (NMIs) and Designated Institutes (DIs) to demonstrate the validity of the procedures the employed for determination of nitrogen mass fraction in glycine. The study material for this key comparison and pilot study has been selected to be representative as one of the aminoacid-the simplest part of the protein. Glycine is an amino acid, single acid that does not have any isomers (melting point-290 °C; specific heat of evaporation-528,6 J/kg; specific melting heat-981,1 J/kg; pKa-2,34, molar mass-75,07 g/mol, density-1,607 g/cm3). Ural Scientific Research Institute for Metrology (UNIIM) acted as the coordinating laboratory of this comparison and pilot study. Eight NMIs participated in this key comparison and two NMIs participated in Pilot study. The results of Pilot study are excluded from the Report B.

Keywords
Amino acids, Food products, Indicators (chemical), Isomers, Oils and fats, Proteins, Specific heat, Determination of proteins, Energy value, Key comparison, Mass fraction, National measurement institute, Pilot studies, Scientific research institutes, Study materials, Nitrogen
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-31151 (URN)10.1088/0026-1394/54/1A/08004 (DOI)2-s2.0-85015705697 (Scopus ID)
Available from: 2017-08-23 Created: 2017-08-23 Last updated: 2021-06-18Bibliographically approved
Magnusson, B. & Haraldsson, C. (2005). Isotope dilution with ICP-MS - Simplified uncertainty estimation using a robust procedure based on a higher target value of uncertainty (ed.). Journal of Analytical Atomic Spectrometry, 20, 1024-1029
Open this publication in new window or tab >>Isotope dilution with ICP-MS - Simplified uncertainty estimation using a robust procedure based on a higher target value of uncertainty
2005 (English)In: Journal of Analytical Atomic Spectrometry, Vol. 20, p. 1024-1029Article in journal (Refereed) Published
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-5941 (URN)7260 (Local ID)7260 (Archive number)7260 (OAI)
Available from: 2016-09-08 Created: 2016-09-08 Last updated: 2021-06-18Bibliographically approved
Lyvén, B. & Haraldsson, C. (2003). Competition between iron- and carbon-based colloidal carriers for trace metals in a freshwater assessed using flow field-flow fractionation coupled to ICPMS (ed.). Geochimica et Cosmochimica Acta, 67, 3791-3802
Open this publication in new window or tab >>Competition between iron- and carbon-based colloidal carriers for trace metals in a freshwater assessed using flow field-flow fractionation coupled to ICPMS
2003 (English)In: Geochimica et Cosmochimica Acta, Vol. 67, p. 3791-3802Article in journal (Refereed) Published
Abstract [en]

Competition between iron- and carbon-based colloidal carriers for trace metals in a freshwater assessed using flow field-flow fractionation coupled to ICPMS

National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-5855 (URN)2195 (Local ID)2195 (Archive number)2195 (OAI)
Available from: 2016-09-08 Created: 2016-09-08 Last updated: 2021-06-18Bibliographically approved
Lyvén, B., Haraldsson, C. & Hassellöv, M. (1999). Determination of continuous size and trace element distribution of colloidal material in natural water by online coupling of flow field-flow fractionation with ICP MS (ed.). Analytical Chemistry, 71(16), 3497-3502
Open this publication in new window or tab >>Determination of continuous size and trace element distribution of colloidal material in natural water by online coupling of flow field-flow fractionation with ICP MS
1999 (English)In: Analytical Chemistry, ISSN 0003-2700, E-ISSN 1520-6882, Vol. 71, no 16, p. 3497-3502Article in journal (Other academic) Published
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-5729 (URN)1451 (Local ID)1451 (Archive number)1451 (OAI)
Available from: 2016-09-08 Created: 2016-09-08 Last updated: 2021-06-18Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-4265-5828

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