• Metrologia (IF 2.28) Pub Date : 2020-08-06
C Michotte, G Ratel, S Courte, M Nonis, A Iwahara, C J Da Silva, R Fitzgerald, D E Bergeron, J T Cessna, L Laureano-Pérez, L Pibida, B E Zimmerman, M Zhang, J Liang, H Liu, F Juget, Y Nedjadi, C Fréchou, C Bobin, E Yeltepe and A Dirican

This report summarises the results for the new BIPM.RI(II)-K1.Ge-68 comparison. Six metrology institutes have participated, enabling the first value of the key comparison reference value(KCRV) to be determined. The KCRV was calculated using the power-moderated weighted mean and the results. A link has been made to the CCRI(II)-K2.Ge-68 comparison held in 2015 through the NIST, NIM,IRA-METAS and the

更新日期：2020-08-10
• Metrologia (IF 2.28) Pub Date : 2020-08-04
F Riedel, A Al-Masoudi, E Benkler, S Dörscher, V Gerginov, C Grebing, S Häfner, N Huntemann, B Lipphardt, C Lisdat, E Peik, D Piester, C Sanner, C Tamm, S Weyers, H Denker, L Timmen, C Voigt, D Calonico, G Cerretto, G A Costanzo, F Levi, I Sesia, J Achkar, J Guéna, M Abgrall, D Rovera, B Chupin, C Shi, S Bilicki, E Bookjans, J Lodewyck, R Le Targat, P Delva, S Bize, F N Baynes, C F A Baynham, W Bowden

We carried out a 26-day comparison of five simultaneously operated optical clocks and six atomic fountain clocks located at INRIM, LNE-SYRTE, NPL and PTB by using two satellite-based frequency comparison techniques: broadband Two-Way Satellite Time and Frequency Transfer (TWSTFT) and Global Positioning System Precise Point Positioning (GPS PPP). With an enhanced statistical analysis procedure taking

更新日期：2020-08-05
• Metrologia (IF 2.28) Pub Date : 2020-08-04
Jinxin Xu, Jinyang Feng, Qiyu Wang, Lishuang Mou, Zhengkun Li, Bin Han, Lushuai Qian, Ruo Hu, Shuqing Wu, Qing He and Tao Zheng

The determination of the local acceleration of gravity at the mass position is an important aspect of the joule balance. Since a simultaneous measurement of the absolute gravity at the mass position with the joule balance in place is impossible, seven gravity reference sites are chosen in the joule balance laboratory. Absolute and relative gravity measurements at the reference sites were performed

更新日期：2020-08-05
• Metrologia (IF 2.28) Pub Date : 2020-08-04
Andreia Furtado, Frank Lorenz and Henning Wolf

Nowadays, fast and precise density measurements of fluids are mostly performed using so-called oscillation-type density meters, able to measure in a very wide interval of temperature and pressure. This work aimed to developed, characterized and validated a high-pressure density measurement (HPDM) apparatus ensuring the traceability to SI of density measurements performed with these devices at high

更新日期：2020-08-05
• Metrologia (IF 2.28) Pub Date : 2020-08-03
Uwe Brand, Michael Matus, Laura Carcedo, Lukasz Slusarski, Gian Bartolo Picotto, Antti Lassila, Faith Hungwe, Olena Flys, Murat Aksulu and Vladimir Kosteev

A comparison measurement between 10 national metrology institutes on two types of depth setting standards was conducted using mostly tactile but also two optical instruments for measurement. Three etched silicon standards with depths of 5, 20 and 50 μm and one diamond turned nickel coated copper standard with depths of 200, 600 and 900 μm were measured. The cross section of the grooves was trapezoidal

更新日期：2020-08-04
• Metrologia (IF 2.28) Pub Date : 2020-08-03
Xiaomin Li, Hongmei Li, Qinghe Zhang, Xiaohua Lu, Shuangqing Li, Matthias Koch, Joachim Polzer, Rudolf Hackenber, Md Moniruzzaman, Mala Khan, Elias Kakoulides, Kong Pak-wing, Richy, Ng Chi-shing, Ting Lu, Ee Mei Gui, Pui Sze Cheow, Tang Lin Teo, Eliane Rego, Bruno Garrido, Lucas Carvalho, Rodrigo Leal, Fernando Violante, Song-Yee Baek, Sunyoung Lee, Kihwan Choi, Byungjoo Kim, Milena Bucar-Miklavcic

The demonstration of competency and equivalence for the assessment of levels of contaminants and nutrients in primary foodstuffs is a priority within the 10-year strategy for the CCQM Organic Analysis WG series of Track A core comparisons. The area of low polarity analytes in high fat foods had not been covered by the OAWG for many years since the key comparison CCQM-K21 p,p'-DDT in fish oil occurring

更新日期：2020-08-04
• Metrologia (IF 2.28) Pub Date : 2020-08-03
Christina Liaskos, George Rhoderick, Joseph Hodges, Antonio Possolo and Olaf Wilke

Growing awareness of the impact of monoterpenes on climate, atmospheric chemistry, and indoor air quality has necessitated the development of measurement standards to globally monitor and control their emissions. For National Metrology Institutes to develop such standards, it is essential that they demonstrate measurement equivalence for assigned values at the highest levels of accuracy. This report

更新日期：2020-08-04
• Metrologia (IF 2.28) Pub Date : 2020-08-03
R D Josephs, A Daireaux, M Bedu, Xiuqin Li, Xiaomin Li, Z Guo, T Choteau, G Martos, S Westwood, R I Wielgosz, H Li, M Simón, E C P do Rego, B C Garrido, R Leal, L Carvalho, E Guimarães, A Bahadoor, J Bates, J E Melanson, P Giannikopoulou, C Alexopoulos, E Kakoulides, I Mugenya, D Prevoo-Franzsen, M Fernandes-Whaley, S Marbumrung, M Bilsel, B Binici and T Gokcen

The CCQM-K154.a and subsequent CCQM-K154.a.1 comparisons were coordinated by the the Bureau International des Poids et Mesures (BIPM) and the Chinese National Institute of Metrology (NIM) on behalf of the Organic Analysis Working Group (OAWG) of the Comité Consultatif pour la Quantité de Matière (CCQM) for National Measurement Institutes (NMIs) and Designated Institutes (DIs) which provide measurement

更新日期：2020-08-04
• Metrologia (IF 2.28) Pub Date : 2020-08-02
Steven van den Berg, Paul Dekker, Subrena Harris, Teresa Goodman, Marek Šmíd, Grzegorz Szajna, Jarle Gran, Anne Andersson, Stefan Källberg, Özcan BAZKIR and Seval MERIC

The Euramet.PR-K2.a comparison on spectral responsivity for the wavelength range 900 nm to 1600 nm, as described in this report, was carried out to establish the degree of equivalence for the participating European laboratories with respect to the Key Comparison Reference Value (KCRV) of the CCPR-K2.a-2003 comparison. Seven laboratories, including pilot and link laboratory, participated. The comparison

更新日期：2020-08-03
• Metrologia (IF 2.28) Pub Date : 2020-08-02
Leonardo De la Cruz, Jorge Torres, Adrián Solano, Marcial Espinoza, Maria Neyra, Pablo Constantino, Jesús Aranzolo and Ricardo Sánchez

This report presents the final results of the supplementary comparison SIM.M.P-S10 for pneumatic gauge pressure from 700 kPa to 7 000 kPa. This comparison was carried out in the period from November 2014 to January 2015, by using a digital pressure manometer with uncertainty 0.010 % of the reading as the transfer standard for the comparison. The reference value for this comparison was given by the

更新日期：2020-08-03
• Metrologia (IF 2.28) Pub Date : 2020-08-02
R D Josephs, M Li, A Daireaux, T Choteau, G Martos, S Westwood, R I Wielgosz, H Li, S Wang, L Feng, T Huang, M Pan, T Zhang, N Gonzalez-Rojano, M Balderas-Escamilla, A Perez-Castorena, M Perez-Urquiza, I Ün, and M Bilsel

Under the auspices of the Protein Analysis Working Group (PAWG) of the Comité Consultatif pour la Quantité de Matière (CCQM) a pilot study, CCQM-P55.2.b, was coordinated by the Bureau International des Poids et Mesures (BIPM) and the Chinese National Institute of Metrology (NIM). Three Metrology Institutes or Designated Institutes and the BIPM participated. Participants were required to assign the

更新日期：2020-08-03
• Metrologia (IF 2.28) Pub Date : 2020-07-30
Christian Kottler, Andreas Steurer, Frank Delaunay, Jacco de Pooter, Cristina García Mulas and Liviu-Cristian Mihailescu

The air kerma and absorbed dose to water standards for 60Co radiotherapy beams of 6 EURAMET NMIs were compared by circulating 2 transfer standards. The schedule for the measurements lasted from March 2013 to February 2015. The participants determined the calibration coefficients for the 2 transfer standards in both radiation quantities mentioned above. The comparison results are given in terms of air

更新日期：2020-08-01
• Metrologia (IF 2.28) Pub Date : 2020-07-26
Steven Yang, CM Tsui, Stephane Solve, Kyu-Tae Kim, Srdan Calija, Jon Bartholomew and Abdullah Alrobaish

This report presents the GULFMET key comparison (GULFMET.EM.BIPM-K11) results of DC voltages at the 1.018 V and 10 V with two travelling electronic DC reference standards. This comparison was supported by the BIPM and GULFMET associate members, KRISS and SCL, which are from the APMP. The linking difference from the BIPM.EM-K11 KCRV was calculated. The agreement between participating laboratories is

更新日期：2020-07-27
• Metrologia (IF 2.28) Pub Date : 2020-07-26
Joanna Kolasa and Daniela Virovska

This final report describes the results obtained in a key comparison of primary vibration calibration facilities. Two piezoelectric standard accelerometers (one single-ended as well one back-to-back type) were calibrated first at Central Office of Measures (GUM), acting as pilot and linking laboratory, and Bulgarian Institute for Metrology (BIM). The results of the BIM obtained in this comparison were

更新日期：2020-07-27
• Metrologia (IF 2.28) Pub Date : 2020-07-26
D del Campo, Y Abdelaziz, M Anagnostou, N Arifovic, R A Bergerud, J Bojkovski, E Ciocarlan, F Edler, C Elliot, O Hathela, N Hodzic, M Holmsten, L Iacomini, M Kozicki, S Nedialkov, M Sadli, S Simic, R Strnad and E Turzó-András

This report present the results of the EURAMET inter-comparison carried out to compare the calibration of thermocouples from 419,527 °C (freezing point of Zn) up to 1492 °C (melting point of the Pd-C eutectic). This inter-comparison is intended to be used to support the calibration and measurement capabilities (CMCs) of the participants in the calibration of thermocouples. The comparison was organized

更新日期：2020-07-27
• Metrologia (IF 2.28) Pub Date : 2020-07-26
E Frahm, B Mickan, V Gulyuk, G Reut, G Zigmantas, M Benkova and M Kayumov

A supplementary comparison, COOMET.M.FF-S2, in the field of water flow was organized by the COOMET Technical Committee (TC) 1.4 Flow Measurement. The goal of the comparison was to confirm the calibration and measurement capabilities (CMC) of the participating national metrology institutes (NMIs) in the flow ranges between 0.5 m 3 /h and 5.0 m 3 /h, and, respectively, between 20.0 m 3 /h and 100.0 m

更新日期：2020-07-27
• Metrologia (IF 2.28) Pub Date : 2020-07-12
D Mari, A Nicolaus, E Kuhn, N Kuramoto, G Mana and E Massa

The counting of 28 Si atoms plays a fundamental role in the realisation of the unit of mass in terms of stipulated values of fundamental physical constants. In this realisation, the measurement of the volume of a 28 Si sphere is a fundamental step. This paper reports a finite element analysis of the self-weight effect on the volume determination, taking the crystal anisotropy into account. The sphere

更新日期：2020-07-13
• Metrologia (IF 2.28) Pub Date : 2020-07-12
A Calderón, A Ferrero and J Campos

When measuring the Bidirectional Reflectance Distribution Function (BRDF) to characterize typical materials, the effect of the polarization of the light source or the dependence of the detector on the polarization is not usually considered, even though many studies have proven their impact in the uncertainty of the BRDF of most materials, including diffuse reflectance standards. A methodology to assess

更新日期：2020-07-13
• Metrologia (IF 2.28) Pub Date : 2020-07-12
H Fang, F Bielsa, S Li, A Kiss and M Stock

After several years of development and continuous improvement of the BIPM Kibble balance, mass measurement of a 1 kg Pt/Ir artefact in terms of the Planck constant has been carried out. The paper describes the apparatus and its alignment, and explains the measurement and data processing. The balance operates in a one-mode and two measurement phase scheme using a bifilar coil. The mass value of the

更新日期：2020-07-13
• Metrologia (IF 2.28) Pub Date : 2020-07-12
I González de Arrieta, T Echániz, R Fuente, J M Campillo-Robles, J M Igartua and G A López

This work reports on the upgrades made to the direct emissivity measurement facility of the University of the Basque Country (UPV/EHU). The instrumental improvements consist of, among others, a high-vacuum system and a wider temperature range (300 K to 1273 K). Methodological developments include a refined measurement equation with updated parameters and a reworked ISO-compliant uncertainty budget

更新日期：2020-07-13
• Metrologia (IF 2.28) Pub Date : 2020-07-12
Lushuai Qian, Jinxin Xu, Zhengkun Li, Bing Han, Wei Zhao and Zhonghua Zhang

The joule balance is one of the mass traceability devices in the revised International System of Units, and its smooth operation relies on a compensation coil to reduce the effect of the external magnetic field. In this paper, the interaction between the magnetized coil-suspension system and the compensation coil is theoretically analyzed and experimentally verified. First, an additional induced voltage

更新日期：2020-07-13
• Metrologia (IF 2.28) Pub Date : 2020-07-02
P J Brewer, B Gieseking, V F Ferracci, M Ward, P Carroll, S Bell and B Hall

The measurement of trace amounts of water in process gases is of paramount importance to a number of manufacturing processes. Water is considered to be one of the most difficult impurities to remove from gas supply systems and there is strong evidence that the presence of water contamination in semiconductor gases has a measurable impact on the quality and performance of devices. Consequently, semiconductor

更新日期：2020-07-05
• Metrologia (IF 2.28) Pub Date : 2020-07-01
R D Josephs, M Li, A Daireaux, T Choteau, G Martos, S Westwood, R I Wielgosz, H Li, S Wang, X Li, N Shi, P Wu, L Feng, T Huang, T Zhang, S Li, P J Beltrão,, A Marcos Saraiva, B C Garrido, S M Naressi Scapin, W Wollinger, Y Bacila Sade, M -P Thibeault, B B Stocks, J E Melanson, T Kinumi, M F Bin Rezali, M Öztug, Müslüm Akgöz and M Quaglia

Under the auspices of the Protein Analysis Working Group (PAWG) of the Comité Consultatif pour la Quantité de Matière (CCQM) a key comparison, CCQM-K115.b, was coordinated by the Bureau International des Poids et Mesures (BIPM) and the Chinese National Institute of Metrology (NIM). Seven Metrology Institutes or Designated Institutes and the BIPM participated. Participants were required to assign the

更新日期：2020-07-03
• Metrologia (IF 2.28) Pub Date : 2020-06-25
M Ojanen, M Shpak, P Kärhä, R Leecharoen and E Ikonen

Description unavailable

更新日期：2020-06-26
• Metrologia (IF 2.28) Pub Date : 2020-06-25
A Tchaikovsky, A Schoeberl, H Schueffl, A Raab, S Emin, A Slany, P Heffeter, G Koellensperger and C Swart

We have investigated species-specific isotope dilution mass spectrometry (IDMS) for the quantification of ferritin-bound iron in murine serum and brain. Therefore, fresh samples were analyzed using size exclusion chromatography inductively coupled plasma mass spectrometry (SEC-ICP-MS). Isotopically labeled ( 57 Fe)ferritin was used as calibrant for the quantification of ferritin-bound iron in murine

更新日期：2020-06-26
• Metrologia (IF 2.28) Pub Date : 2020-06-25
J P Sun, T Li, X P Hao, J Pan and J X Zeng

The subrange inconsistency (SRI) of the International Temperature Scale of 1990 (ITS-90) arises from the use of different interpolating equations for the same standard platinum resistance thermometers (SPRTs), called Type 1 non-uniqueness, and is a significant component of the uncertainty in the realization of the scale. In order to eliminate the SRI, new interpolating equations were proposed for the

更新日期：2020-06-26
• Metrologia (IF 2.28) Pub Date : 2020-06-25
Heng Zhang, De-Kai Mao, Qin Luo, Zhong-Kun Hu, Le-Le Chen and Min-Kang Zhou

The self-attraction effect (SAE) is an important systematic error in a high-precision atom interferometry gravimeter, which has been researched. In this paper, we use the finite element method (FEM) to calculate the SAE of an atom gravity gradiometer. In this way, the SAE of the gravity gradiometer is accurately determined, and the calculation result shows this effect is 235(8) E (1 E = 1 ##IMG## [http://ej

更新日期：2020-06-26
• Metrologia (IF 2.28) Pub Date : 2020-06-23
Jun Wang, Jingbo Chao, Chao Wei, Haifeng Li, Qian Wang, Panshu Song, Hai Lu, Yuanjing Zhou, Yichuan Tang, Song Wang, Lu Yang, Kenny Nadeau, Indu Gedara Pihillagawa, Monique E Johnson, Lee L Yu, Teemu Näykki, Timo Sara-Aho, Ramiro Pérez Zambra, Romina Napoli, Olaf Rienitz, Janine Noordmann, Carola Pape, Jessica Towara, Cheung Tsz-chun, Chu Hei-shing, Aleksei Stakheev, Vladimir Dobrovolskiy, Tatiana

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

更新日期：2020-06-25
• Metrologia (IF 2.28) Pub Date : 2020-06-22
Olaf Rienitz, Reinhard Jährling, Janine Noordmann, Carola Pape, Karin Röhker, Jochen Vogl, Judith Velina Lara Manzano, Wladyslaw Kozlowski, Rodrigo Caciano de Sena, Janaína Marques Rodrigues, Ariel Hernan Galli, Yong-Hyeon Yim, Kyoung-Seok Lee, Jong Hae Lee, Hyung-Sik Min, Chao Jingbo, Shi Naijie, Wang Qian, Tongxiang Ren, Wang Jun, Nongluck Tangpaisarnkul, Toshihiro Suzuki, Naoko Nonose, Zoltán Mester

The determination of the mass fractions of bromide, sulfate, and lead as well as the isotopic composition of the lead (expressed as the molar mass and the amount fractions of all four stable lead isotopes) in an aqueous solution of sodium chloride with a mass fraction of 0.15 g/g was the subject of this comparison. Even though the mass fractions ranged from 3 μg/g (bromide) to 50 ng/g (lead), almost

更新日期：2020-06-24
• Metrologia (IF 2.28) Pub Date : 2020-06-22
Aykurt AltÄ±ntaş, Ilknur Koçaş, Yasin Durgut, Joseph Bartolo, Mercede Bergoglio, Lovorka Grgec Bermanec, Alen Bošnjaković, Sanja Burzić, Antoine Condereys, Miruna Dobre, Peter Farar, Paul Hetherington, Nieves Medina, Wladimir Sabuga, Oliver Ott, Thomas Konczak, Ion Sandu, Janez Setina, Dietmar Steindl, Csilla Vámossy, Bernard Waller, Christian Wuethrich, Adam Brzozowski, Jan van Geel, Sari Saxholm

A EURAMET key comparison of the national pressure standards in the range 0.7 MPa to 7.0 MPa of gas gauge pressure was carried out. The circulation of the transfer standard began in November 2011 and lasted until November 2016. The measurand of the comparison was the effective area of the piston-cylinder assembly determined by gauge pressure measurements in the range from 0.7 MPa to 7.0 MPa. As the

更新日期：2020-06-24
• Metrologia (IF 2.28) Pub Date : 2020-06-21
D J Butler, N Saito, L Büeermann, J -H Lee, J Laban, S Srimanoroth, M S Kulkarni and N Tebekana

The results of a regional supplementary comparison of air kerma standards from eight standards laboratories are presented. The three transfer ionisation chambers (two model Exradin A4 chambers and one Exradin A5 chamber manufactured by Standard Imaging, Inc, Middleton, MI, USA) were measured at each laboratory over the period 2013 to 2016. Air kerma calibration coefficients for the transfer instruments

更新日期：2020-06-23
• Metrologia (IF 2.28) Pub Date : 2020-06-21
Adriaan M H van der Veen, Ewelina T Zalewska, Deborah R van Osselen, Teresa E Fernández, Concepción Gómez, Jan Beránek, Rutger J Oudwater, Denise C Sobrinho, Mariana C Brum, Cristiane R Augusto, Judit Fükö, Tamás Büki, Zsófia Nagyné Szilági, Paul J Brewer, Michael L Downey, Richard C Brown, Miroslava Valkova, Zuzana Durisova, Karine Arrhenius, Bertil Magnusson, Haleh Yaghooby, Tanil Tarhan, Erinç Engin

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

更新日期：2020-06-23
• Metrologia (IF 2.28) Pub Date : 2020-06-21
A Malengo, E Batista, R Arias, L Mićić, A Bošnjaković, M Mirjana, E Piluri, G K Svendsen, M de Huu, A Sarevska, M Mišovich, U Turnšek, A Xhuraj, M Miteva, I Milkamanavičienė, E Smits, J Á Terradillos González, P Wennergren, A Niessner, C Czibulka and M Benkova

During the EURAMET TC-F annual meeting, held in Boras in 2015, it was agreed to perform the follow up of the CCM.FF-K4.1.2011 organized for the EURAMET NMIs for volume of liquids at 20 L. The transfer standard was a 20 L pipette supplied by CENAM. The participants of this comparison also involved in the comparison CCM.FF-K4.1.2011 were: CENAM, INRIM, IPQ, RISE and VSL, in total there were twenty-one

更新日期：2020-06-23
• Metrologia (IF 2.28) Pub Date : 2020-06-14
Y Durgut, C Vámossy, N Petrovski, V Kaçarski, B Tomçini, P Djurić, Vulić, N Al-Jattal, B K Justice, H M Alotaibi, Naif A Alanazi, K Dapkeviciene, A Brzozowski, J Setina, L G Bermanec, J V Geel, S Saxholm, A Altintas, A Bošnjaković, Š Ališić and P Hetherington

The regional supplementary comparison EURAMET.M.P-S13 for pressure measurements in liquid media from 10 MPa to 100 MPa was piloted by the TÜBİTAK UME Pressure Laboratory, Turkey. The transfer standard was a digital pressure gauge, serial number 116321, manufactured by Paroscientific Inc. Eighteen laboratories participated in this comparison. Fourteen laboratories are from EURAMET region; namely UME

更新日期：2020-06-14
• Metrologia (IF 2.28) Pub Date : 2020-06-14
Neil Ashby and Derek van Westrum

We study whether the optical properties of a solid glass retroreflector influence the value of the acceleration of gravity g determined by dropping both solid and open retroreflectors in an absolute ballistic gravimeter. The retroreflectors have equivalent optical centers and are dropped from the same height, at a fixed location, in the same gravimeter while recording time data corresponding to fixed

更新日期：2020-06-14
• Metrologia (IF 2.28) Pub Date : 2020-06-11
Peter Saunders

Non-uniqueness is a fundamental limit to the reproducibility of a defined temperature scale. In this paper, the non-uniqueness of temperatures, T 90 , on the International Temperature Scale of 1990 (ITS-90) above the silver point is fully investigated for the first time. The non-uniqueness arises from three causes: inconsistency in extrapolation with the choice of the three allowable ITS-90 reference

更新日期：2020-06-11
• Metrologia (IF 2.28) Pub Date : 2020-06-11
J Salminen, S Saxholm, J Hämäläinen and R Högström

Accurate and reliable dynamic pressure measurements are needed for optimizing performance in modern combustion engines, manufacturing processes and aerospace applications. Besides fast pressure transients, these applications subject dynamic pressure transducers to elevated temperatures. Both of these quantities effect the sensitivity of transducers. Therefore, transducers should be calibrated at conditions

更新日期：2020-06-11
• Metrologia (IF 2.28) Pub Date : 2020-06-11
Seung-Jin Yoon, Joong-Sung Lee, Carsten Rockstuhl, Changhyoup Lee and Kwang-Geol Lee

We perform experimental quantum polarimetry using a heralded single photon to analyze the optical activity of linearly polarized light traversing a chiral medium. Three kinds of estimators are considered to estimate the concentrations of sucrose solutions from measuring the rotation angle of the linear polarization of the output photons. Through repetition of independent and identical measurements

更新日期：2020-06-11
• Metrologia (IF 2.28) Pub Date : 2020-06-07
R Falk, V Pálinkáš, H Wziontek, A Rülke, M Val'ko, Ch Ullrich, H Butta, J Kostelecký, M Bilker-Koivula, J Näränen, A Prato, F Mazzoleni, C Kirbaş, İ Coşkun, M Van Camp, S Castelein, J D Bernard, A Lothhammer, M Schilling, L Timmen, D Iacovone, G Nettis, F Greco, A A Messina, R Reudink, M Petrini, P Dykowski, M Sękowski, J Janák, J Papčo, A Engfeldt and H Steffen

The regional key comparison of absolute gravimeters, EURAMET.M.G-K3 and the simultaneously organized additional comparison, was held in Germany at the Geodetic Observatory Wettzell of the German Federal Agency for Cartography and Geodesy in the spring of 2018. Here we present the list of the participants who actually performed measurements during the comparison, the data submitted by the operators

更新日期：2020-06-07
• Metrologia (IF 2.28) Pub Date : 2020-06-04
Alejandro Santos, Daniel Slomovitz, Gonzalo Aristoy, Rogelio Sandler, Jose Luis Casais, Patricia Casi de Olivera, Alvaro Zipaquira Triana, Julio Gonzalez, Sergio Ochoa Marquez and Enrico Mohns

This report describes a supplementary comparison on current ratio at power frequencies. The traveling standard was a high precision current transformer. Frequencies of 50 Hz and 60 Hz were used with a current range between 5 A and 1000 A. Participants belong to SIM, except the national metrology institute of Germany, PTB, that belongs to EURAMET. The pilot institute was UTE, from Uruguay. The measurement

更新日期：2020-06-04
• Metrologia (IF 2.28) Pub Date : 2020-06-01
Joële Viallon, Faraz Idrees, Philippe Moussay, Robert Wielgosz and Leif Marsteen

As part of the ongoing key comparison BIPM.QM-K1, a comparison has been performed between the ozone standard of Norway maintained by the Norwegian Institute for Air Research (NILU) and the common reference standard of the key comparison, maintained by the Bureau International des Poids et Mesures (BIPM). The instruments have been compared over a nominal ozone amount-of-substance fraction range from

更新日期：2020-06-01
• Metrologia (IF 2.28) Pub Date : 2020-06-01
Joële Viallon, Faraz Idrees, Philippe Moussay, Robert Wielgosz and Andreas Wolf

As part of the ongoing key comparison BIPM.QM-K1, a comparison has been performed between the ozone standard of Austria maintained by the Environment Agency Austria (EAA) and the common reference standard of the key comparison, maintained by the Bureau International des Poids et Mesures (BIPM). The instruments have been compared over a nominal ozone amount-of-substance fraction range from 0 nmol/mol

更新日期：2020-06-01
• Metrologia (IF 2.28) Pub Date : 2020-05-25
Andrea Prato, Fabrizio Mazzoleni and Alessandro Schiavi

Traceability of digital sensors is a metrological challenge, as well as a present priority, as stated within the emerging metrology requirements for the future in the Strategy 2017 to 2027 document of the Consultative Committee for Acoustics, Ultrasound, and Vibration of BIPM. From this perspective, in this paper, a calibration system for 3-axis digital MEMS accelerometers is described, in order to

更新日期：2020-05-25
• Metrologia (IF 2.28) Pub Date : 2020-05-25
D R White and P M C Rourke

The thermal metrology community is considering revising the International Temperature Scale of 1990 (ITS-90), motivated by the opportunity to improve the thermodynamic accuracy, reproducibility, and ease of use of the scale, as well as health and safety concerns with the use of mercury in the current scale. This paper considers the mathematical structure of the standard platinum resistance thermometer

更新日期：2020-05-25
• Metrologia (IF 2.28) Pub Date : 2020-05-25
Marco Pizzocaro, Filippo Bregolin, Piero Barbieri, Benjamin Rauf, Filippo Levi and Davide Calonico

We report the absolute frequency measurement of the unperturbed optical clock transition 1 S 0 – 3 P 0 in 171 Yb performed with an optical lattice frequency standard. Traceability to the International System of Units is provided by a link to International Atomic Time. The measurement result is 518 295 836 590 863.61(13) Hz with a relative standard uncertainty of ##IMG## [http://ej.iop.org/images/0

更新日期：2020-05-25
• Metrologia (IF 2.28) Pub Date : 2020-05-25
Yong-Gyoo Kim and Sunghun Kim

Two pure Ni cells for thermocouple calibration were fabricated in alumina crucibles with different internal structures to investigate their melting and freezing behaviors. One of the produced crucibles had a smooth surface, and the other was made with internal circular grooves. The melting and freezing processes of each cell were investigated in 10 melting/freezing cycles using a type B thermocouple

更新日期：2020-05-25
• Metrologia (IF 2.28) Pub Date : 2020-05-25
Piotr Ablewski, Marcin Bober and Michał Zawada

We report the results of measurements of the total hemispherical emissivity coefficients of the most popular vacuum compatible materials used in designs of optical atomic clocks. The experimental vacuum test chamber was designed to precisely quantify the heat transfer between the material’s samples and a calibrated plate that serves as a thermometer. The temperatures of vacuum chamber’s internal surfaces

更新日期：2020-05-25
• Metrologia (IF 2.28) Pub Date : 2020-05-25
Leon Chao, Frank Seifert, Darine Haddad, Jon Pratt, David Newell and Stephan Schlamminger

A tabletop-sized Kibble balance (KIBB-g1) designed to directly realize mass at the gram-level range with uncertainties on the order of parts in 10 6 has been developed at the National Institute of Standards and Technology (NIST). The masses of a nominally 5 g and 1 g weight were determined with ##IMG## [http://ej.iop.org/images/0026-1394/57/3/035014/metab507dieqn001.gif] standard uncertainties of 9

更新日期：2020-05-25
• Metrologia (IF 2.28) Pub Date : 2020-05-17
T A B Milhomem, Z M D Soares, G P Ripper, J P Ayala, G M Guevara, F A Serrano, A Solano, R P Wagner and P Hanes

This document is the Final Report of the Inter-American Metrology System supplementary comparison on pistonphone calibration SIM.AUV.A-S2. Seven national metrology institutes participated on this comparison: CENAM/Mexico, INACAL/Peru, INMETRO/Brazil, INTI/Argentina, LACOMET/Costa Rica, NIST/USA and NRC/Canada and INMETRO was the pilot institute responsible for its coordination. One pistonphone was

更新日期：2020-05-17
• Metrologia (IF 2.28) Pub Date : 2020-05-06
A Germak, C Kuzu, C Origlia and E Pelit

This report describes a bilateral EURAMET supplementary comparison on Rockwell hardness scales of two national metrology institutes of Italy and Turkey, INRiM and UME, respectively. The pilot laboratory is INRiM in the comparison where three sets of hardness reference blocks for the Rockwell hardness scales of HRA, HRBW and HRC were used. Each set of blocks consists of four hardness reference blocks

更新日期：2020-05-06
• Metrologia (IF 2.28) Pub Date : 2020-05-05
Gregor Hülsen, Julian Gröbner, Alkis Bais, Mario Blumthaler, Henri Diémoz, David Bolsée, Ana Diaz, Ilias Fountoulakis, Erik Naranen, Josef Schreder, Facta Stefania and José Manuel Vilaplana Guerrero

In 2017, PMOD/WRC organised the solar ultraviolet broadband radiometer comparison campaign UVC-II . All 75 participating instruments from all over the world were characterised in the laboratory of the World Calibration Center for UV (WCCUV) and calibrated outdoors relative to the Qasume reference spectroradiometer. After a three month calibration period, all devices were returned to their owners, accompanied

更新日期：2020-05-05
• Metrologia (IF 2.28) Pub Date : 2020-05-05
Yu-Jie Tan, Miao-Miao Zhao, Pan-Pan Wang, Ya-Jie Wang, Yao-Yao Xu, Xiao-Chun Duan, Cheng-Gang Shao and Zhong-Kun Hu

Since the double-loop atom interferometer consisting of Raman ##IMG## [http://ej.iop.org/images/0026-1394/57/3/035006/metab7174ieqn1.gif] {${\frac{\pi }{2}\!-\!\pi\!-\!\pi\!-\!\frac{\pi }{2}}$} four-pulse sequences can eliminate the dependence of the interferometric phase shift on the atomic initial velocity, it is widely used for rotation measurements. However, our research shows that by coupling

更新日期：2020-05-05
• Metrologia (IF 2.28) Pub Date : 2020-05-05
Toshiaki Asakai

Analyses of chloride ions, and oxyanions of chlorine named hypochlorite, chlorite, chlorate and perchlorate ions, are of interest especially in the fields of controlling water and food qualities. Some of them do not exist as a certified reference material characterized by a metrologically valid procedure, and the lack of the standards currently creates problems with the instrumental analyses. This

更新日期：2020-05-05
• Metrologia (IF 2.28) Pub Date : 2020-05-05
Qiang Liu, Liang Xing, Sicheng Yan, Liangliang Lv and Zhaoyang Liu

In this paper, the sensing characteristics of a photonic crystal fiber (PCF) Sagnac interferometer based on flat-phase birefringence, zero-group birefringence and the Vernier effect have been studied. The temperature-sensitive liquid is filled into the air holes of the PCF. We realize flat-phase birefringence, by which the sensitivity can reach 4.9 nm/°C and 3.5 nm/°C. We find a new phenomenon in that

更新日期：2020-05-05
• Metrologia (IF 2.28) Pub Date : 2020-05-04
P Gournay, B Rolland, D -H Chae and W -S Kim

The ongoing on-site comparison BIPM.EM-K12 is part of the BIPM programme implemented to verify the international coherence of the primary resistance standards. It allows National Metrology Institutes (NMIs) to validate their implementations of the quantum Hall effect (QHE) for dc resistance traceability by comparison to the reference maintained at the BIPM. The realization of the ohm from the QHE-based

更新日期：2020-05-04
• Metrologia (IF 2.28) Pub Date : 2020-05-04
C Kessler, D T Burns, E Mainegra-Hing, H Shen and M R McEwen

A key comparison has been made between the air-kerma standards of the NRC and the BIPM in mammography x ray beams. The results show the standards to be in agreement at the level of the combined standard uncertainty of 3.2 parts in 10 3 . The results are analysed and presented in terms of degrees of equivalence, suitable for entry in the BIPM key comparison database. == Main text To reach the main text

更新日期：2020-05-04
• Metrologia (IF 2.28) Pub Date : 2020-04-30
C Michotte, S Courte, M Nonis, M W van Rooy, M J van Staden and J Lubbe

Since 1989, 6 national metrology institutes (NMI) have submitted 7 samples of known activity of 166m Ho to the International Reference System (SIR) for activity comparison at the Bureau International des Poids et Mesures (BIPM), with comparison identifier BIPM.RI(II)-K1.Ho-166m. The values of the activity submitted were between about 70 kBq and 470 kBq. The key comparison reference value (KCRV) has

更新日期：2020-04-30
• Metrologia (IF 2.28) Pub Date : 2020-04-30
P Gournay, B Rolland, Y Lu and J Zhao

The ongoing on-site comparison BIPM.EM-K12 is part of the BIPM programme implemented to verify the international coherence of the primary resistance standards. It allows National Metrology Institutes (NMIs) to validate their implementations of the quantum Hall effect (QHE) for dc resistance traceability by comparison to the reference maintained at the BIPM. The realization of the ohm from the QHE-based

更新日期：2020-04-30
• Metrologia (IF 2.28) Pub Date : 2020-04-26
S Sembian and M Liverts

While conventional shock tubes have a distinct advantage in dynamic calibration methods due to their inherent capability to generate pressure pulses of desired amplitude and fast rise time, they are limited to the lower levels of the pressure amplitude realization range (≤7 MPa). With the increasing need for a traceable dynamic calibration standard across wider pressure ranges, a novel technique using

更新日期：2020-04-26
• Metrologia (IF 2.28) Pub Date : 2020-04-26
Scott Beattie, Bin Jian, John Alcock, Marina Gertsvolf, Rich Hendricks, Krzysztof Szymaniec and Kurt Gibble

We report the first accuracy evaluation of NRC-FCs2, an atomic fountain clock developed at the National Research Council Canada. The short term stability at high atomic density is 1.1 × 10 −13 at 1 second of averaging time. The typical overall fractional type B uncertainty is 2.3 × 10 −16 . GNSS-based frequency comparisons of NRC-FCs2 with the SI second, as reported by the BIPM over fourteen months

更新日期：2020-04-26
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