Slovenský Metrologický Ústav

Main textIn order to validate the participants' calibration measurement capabilities (CMCs) and to provide a basis for the submission of reviewed or new CMCs for National Metrology Institutes of member countries of the "Comité International des Poids et Mesures" (CIPM), supplementary comparisons of mass standards have been carried out under the auspices of the EURAMET. This is a comparison of the 20kg stainless steel mass standard. The aim of this supplementary comparison was to compare the results obtained by NMIs in the calibration of 20kg stainless steel weights. BEV, Austria was the pilot laboratory. Measurements were performed between 15 May 2022 and 28 June 2024. The data analysis was carried out by Dr Lars Nielsen (DFM). The participants' results were in agreement with the comparison reference value except one laboratory (SMU, Slovakia), after two laboratories updated their values.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 https://www.bipm.org/kcdb/.The final report has been peer-reviewed and approved for publication by the CCM, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).

The "purity" of an organic compound typically refers, in practice, to an assignment of the mass fraction content of the primary organic component present in the material. The "purity" value of an organic primary calibrator material is the ultimate source of metrological traceability of any quantitative measurement of the content of that compound in a given matrix. The primary calibrator may consist of a Certified Reference Material (CRM) whose purity has been assigned by the CRM producer or a laboratory may choose to value-assign a material to the extent necessary for their intended application by using appropriately valid methods. This report provides an overview of the approach, performance and applicability of the principal methods used to determine organic purity including mass balance, quantitative NMR, thermal methods and direct-assay techniques. A statistical section reviews best practice for combination of data, value assignment as the upper limit values corresponding to 100 % purity are approached and how to report and propagate the standard uncertainty associated with the assigned values.

Editovaná vedecká kniha s názvom „Mimoriadne intervenčné zásahy štátu počas pandémie COVID-19 v Slovenskej republike“ je spracovaná ako záverečný výstup autorského kolektívu riešiteľov projektu VEGA č. 1/0472/21: Prierezová analýza mimoriadnych intervenčných zásahov štátu a ich aplikácie v období krízy spôsobenej ochorením COVID-19 na súkromnoprávne vzťahy v Slovenskej republike, s podporu Vedeckej grantovej agentúry Ministerstva školstva, vedy, výskumu a športu Slovenskej republiky. V jednotlivých kapitolách sa autori, resp. spoluautori kapitol venujú vybraným mimoriadnym intervenčným zásahom štátu počas pandémie COVID-19, ktoré zodpovedajú ich odbornému zameraniu. Spoločným menovateľom jednotlivých častí publikácie je snaha autorov analyzovať vybrané intervenčné zásahy štátu, smerujúce k efektívnej a urgentnej ochrane súkromno-právnych vzťahov a ich účastníkov v širšom zmysle a z viacerých aspektov – z pohľadu občianskeho práva hmotného (záväzkové právo, vlastnícke právo, dedičské právo), civilného procesného práva, obchodného práva, konkurzného, ústavného práva a pracovného práva.

Main textThe subsequent key comparison K73.2018.2 was performed to demonstrate the capability of the participating institutes to measure the amount content of H+ in hydrochloric acid as a follow-up of the previous key comparison CCQM-K73.2018. A HCl solution of a slightly different composition to that in CCQM-K73.2018 was used.There were two institutes and SMU as the coordinating laboratory participating in this subsequent comparison. UkrCSM obtained results in good agreement with the reference value; INMETRO results exhibited a large bias due to a calculation error found only after disclosure of the results.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 https://www.bipm.org/kcdb/.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).

Main textThe CCQM key comparison CCQM-K173.1 is a subsequent comparison to CCQM-K173. It was performed to demonstrate the capability of KRISS to measure the amount content of bases. The institutes could use a method of their choice, although the use of coulometry or titrimetry with potentiometric determination of the endpoint was expected. The result of SMU was used as a link to the original comparison CCQM-K173.The results of KRISS were in good agreement with the reference value and may serve as evidence to support respective CMC claims.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 https://www.bipm.org/kcdb/.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).

Main textThis is a report to the Technical Committee for Thermometry of EURAMET (EURAMET TC-T) on the regional key comparison EURAMET.T-K9 of SPRT calibration on the International Temperature Scale of 1990 (ITS-90), from 83.8058 K (the Ar triple point) to 692.677 K (the Zn fixed point). The transfer standards used are long-stem SPRTs.EURAMET.T-K9 is an RMO key comparison linked to the CIPM key comparison CCT-K9. The comparison is organized in five separate collapsed Stars, each one having a CCT-K9 participant as pilot, which provides the link to the KCRV of CCT-K9. Four to five participating laboratories are involved in each Star. The pilots of the five Stars are LNE-Cnam, PTB, INRiM, VSL, NPL. LNE-Cnam is also the coordinator of the comparison, in charge of the collection of the measurement reports from all participants and the preparation of the final report.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 https://www.bipm.org/kcdb/.The final report has been peer-reviewed and approved for publication by the CCT, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).

Main textThis report presents the results of an inter-laboratory comparison (ILC) organized in order to determine the degrees of equivalence of standards for liquid static flow rates in the range of 50 kg/h to 36 000 kg/h under ambient pressure and temperature conditions. Water was used as the calibration fluid.The objective of the comparison was to support and prove the Calibration and Measurement Capabilities (CMC) in liquid flow of the participating NMIs and DIs CETIAT (France), PTB (Germany), FORCE (Denmark), DTI (Denmark), CMI (Czech Republic), RISE (Sweden), VTT (Finland), BEV (Austria), LEI (Lithuania), SMU (Slovakia) and UME TUBITAK (Turkey). The comparison was organized and evaluated by CETIAT, CMI and PTB as pilot laboratories. The comparison was carried out as a three-loop robin, which started in September 2020 at CETIAT and finished in June 2021, also at CETIAT.Two Coriolis mass flow meters were used as transfer standards. In order to estimate the uncertainties u TS, both transfer meters were subjected to characterization measurements at pilot laboratory CETIAT. The following parameters were researched in detail: fluid temperature, line pressure, reproducibility and the effect of zero setting. Following the results of the Chi2-test, one set point of one participant was discarded from the E N calculation.The comparison shows very good agreement between the 11 participating laboratories. Only one laboratory failed the comparison at two set points due to an E N value > 1.2. Two laboratories showed comparison results at "warning level". In order to follow the latest developments in the field of flow comparison evaluation, the standard procedure of COX (2002) was extended by an application of two additional criteria, as for inconclusive or conclusive decisions for calibration. In sum, four laboratories were affected by inconclusive calibration results.The comparison has received financial support from the EMPIR project 17IND13 Metrowamet.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 https://www.bipm.org/kcdb/.The final report has been peer-reviewed and approved for publication by the CCM, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).

Abstract This paper focuses on the problematic of intraocular pressure (IOP) measurements, performed by non-invasive methods. More specifically, the devices that are connected with the presented finding are non-contact tonometers that use concentrated air stream and optical sensors to determine the IOP within a human’s eye. The paper analyzes various influential factors that have an effect on the determination of the IOP values originating from the patients themselves and from the non-contact tonometer devices. The paper furthermore elaborates on the lack of independent methods of calibration and control of these devices. In order to fill this gap a measurement standard device that is capable of calibrating and testing these devices with traceability to the basic SI unit is presented. A detailed characterization and the determination of the expected uncertainty of the device are provided. By introducing an independent and traceable calibration method and control of non-contact tonometers into the clinical practice, the reliability of the measured IOP that is the primary indicator of glaucoma can be improved.

At the highest metrological level, biogas standards are commonly prepared gravimetrically as PSMs (primary standard mixtures). This international key comparison addresses the composition of biogas, to support calibration and measurement services for this renewable energy gas. The mixtures contain nitrogen, carbon dioxide, methane, ethane, propane, hydrogen and oxygen and represent the composition of biogas from landfills. The results in this Track C key comparison on the composition of biogas are generally good. Some of the datasets, especially that of oxygen, showed substantial extra dispersion, that could not be explained by the stated uncertainties.Main textTo 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).