Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Brad Methven"'
Autor:
Suleyman Z Can, Maren Koenig, Anita Roethke, Rodrigo Caciano de Sena, Pavel Migal, Tom Oduor Okumu, Veniamin M. Zyskin, Patricia Romero Arancibia, Betül Ari, Hyung Sik Min, Mirella Buzoianu, Rosi Ketrin, Myung Sub Han, Brad Methven, Lu Yang, S Swarupa Tripathy, R.K. Kotnala, Sung Woo Heo, Marcelo Dominguez de Almeida, Christine Elishian, Antonio Possolo, Alena Sobina, Maria del Rocio Arvizu Torres, James Snell, Kenny Nadeau, Wu Bing, Olaf Rienitz, Youngran Lim, Therese A. Butler, Heidi Goenaga Infante, Maré Linsky, Egor Sobina, Jochen Vogl, Zhou Tao, Edith Valle Moya, Toshihiro Suzuki, Yong-Hyeon Yim, Francisco Segoviano Regalado, Volker Goerlitz, Judith Velina Lara Manzano, Michael R. Winchester, John L. Molloy
Main text CCQM-K143 is a key comparison that assesses participants' ability to prepare single element calibration solutions. Preparing calibration solutions properly is the cornerstone of establishing a traceability link to the International System o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::728db74bb3a78defac9512beda403894
https://nrc-publications.canada.ca/eng/view/object/?id=c2df3d7f-7843-4aa2-ae0e-94d5de31757b
https://nrc-publications.canada.ca/eng/view/object/?id=c2df3d7f-7843-4aa2-ae0e-94d5de31757b
Publikováno v:
Metrologia. 54:796-804
The concept of the relative sensitivity factors required for the correction of the measured ion beam ratios in pin-cell glow discharge mass spectrometry is examined in detail. We propose a data-driven model for predicting the relative response factor
Publikováno v:
Analytical chemistry. 91(6)
The determination of isotope ratios of lead finds many important applications in earth and planetary sciences. In this study, we report the first independent and fully calibrated absolute isotope ratio measurements of a common lead since the seminal
Autor:
Maria del Rocio Arvizu Torres, Heinrich Kipphardt, Guillaume Labarraque, Michael R. Winchester, Olaf Rienitz, Paola Fisicaro, Mirella Buzoianu, Michal Máriássy, Silke Richter, Judith Velina Lara Manzano, Vadim Vladimirovich Smirnov, Wolfram Bremser, Brad Methven, Jochen Vogl, Tao Zhou, Ralph E. Sturgeon, Heidi Goenaga-Infante, Yuri Kustikov, A. Krylov, Gregory C. Turk, Sarah Hill, Egor Sobina, Reinhard Jährling, Tsutomu Miura, Panayot Petrov, Zuzana Hanková, Mike Sargent
For the first time, an international comparison was conducted on the determination of the purity of a high purity element. Participants were free to choose any analytical approach appropriate for their institute's applications and services. The mater
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f991fa73921d7fb17f427d9cc70c936b
https://doi.org/10.1088/1681-7575/aaa677
https://doi.org/10.1088/1681-7575/aaa677
Publikováno v:
Metrologia. 51:410-422
A measurement model based on the use of a pin-cell glow discharge source coupled to a VG 9000 sector field mass spectrometer (GD-MS) for the assignment of purity of high-purity metals, i.e., mass fraction of metal matrix, w(M), is presented. A mass b
Autor:
Tamara Gusarova, Ralf Matschat, Ulrich Panne, Brad Methven, Ralph E. Sturgeon, Heinrich Kipphardt
Calibration of two commercially available glow discharge double focusing mass spectrometers, the VG 9000 and Element GD, is described using synthetic pin standards pressed from solution doped copper and zinc matrices. A special pressing die was devel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::90e0245131822bcc42f74cd9a52c0a1c
https://nrc-publications.canada.ca/eng/view/object/?id=a9914748-e58d-46be-a1a2-5e0f8c1c1b9e
https://nrc-publications.canada.ca/eng/view/object/?id=a9914748-e58d-46be-a1a2-5e0f8c1c1b9e
Autor:
Brad Methven, Hans-Joachim Heinrich, Tamara Gusarova, Ralf Matschat, Jochen Vogl, Akiharu Hioki, Tsutomu Miura, Ralph E. Sturgeon, Ole Petersen, Gundel Riebe, Michael Czerwensky, Leonid A. Konopelko, Gregory C. Turk, Lee L. Yu, Heinrich Kipphardt
Within the National Metrology Institutes (NMIs) and designated laboratories, an interlaboratory comparison, CCQM-P107, was conducted to verify the degree of international comparability concerning the results of purity analysis. The mass fractions of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0eb8fdf63df472e67cc32a290bde2467
https://nrc-publications.canada.ca/eng/view/object/?id=ffb54994-94e8-476b-b635-9fcca4210944
https://nrc-publications.canada.ca/eng/view/object/?id=ffb54994-94e8-476b-b635-9fcca4210944
Autor:
Janaína Marques Rodrigues, Judith Velina Lara Manzano, Süleyman Zühtü Can, Rodrigo Caciano de Sena, Brad Methven, Lee L. Yu, Michael R. Winchester, Jochen Vogl, Heinrich Kipphardt, Olaf Rienitz, Reinhard Jährling, Ralph Sturgeon, Sung Woo Heo, Murat Tunç, Gregory C. Turk, Yong-Hyeon Yim, Maria del Rocio Arvizu Torres, Tsutomu Miura, Tao Zhou
Publikováno v:
ResearcherID
High purity elements can serve as a realization of the SI unit amount of substance for the specific element. Solutions prepared from high purity metals by applying gravimetric preparation and the concept of molar mass are used as 'calibration' soluti
Publikováno v:
Scopus-Elsevier
A continuous-flow microwave-assisted digestion technique was tested with a view to the evaluation of its effectiveness for decomposition of environmental samples. A CEM SpectroPrep system was used at moderate powers and pressures of up to 2413 kPa to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eac03a34db2438684a6b8f9259198bd6
https://doi.org/10.1039/ja9951000981
https://doi.org/10.1039/ja9951000981
Autor:
Heinrich Kipphardt, Ralf Matschat, Jochen Vogl, Tamara Gusarova, Michael Czerwensky, Hans-Joachim Heinrich, Akiharu Hioki, Leonid Konopelko, Brad Methven, Tsutomu Miura, Ole Petersen, Gundel Riebe, Ralph Sturgeon, Gregory Turk, Lee Yu
Publikováno v:
Accreditation & Quality Assurance; Jan2010, Vol. 15 Issue 1, p29-37, 9p