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3 Registro/s encontrado/s en CAT+NORMA
| Tipo de Docum.: | artículo |
| Título: | Key comparison CCQM-K73 amount content of H+ in hydrochloric acid (0.1 mol·kg-1) |
| Autor: | Pratt, Kenneth W.; Ortiz-Aparicio, Jose Luis; Matehuala-Sanchez, Francisco Javier; Pawlina, Monika; Kozłowski, Władysław; Borges, Paulo P.; da Silva Junior, Wiler B.; Borinsky, Mónica B.; Hernandez, Ana; Puelles, Mabel; Hatamleh, Nadia; Acosta, Osvaldo; Nunes, João; Guiomar Lito, M. J.; Camões, M. Filomena; Filipe, Eduarda; Hwang, Euijin; Lim, Youngran; Bing, Wu; Qian, Wang; Chao, Wei; Hioki, Akiharu; Asakai, Toshiaki; Máriássy, Michal; Hanková, Zuzana; Nagibin, Sergey; Manska, Olexandra; Gavrilkin, Vladimir; Kutovoy, Viatcheslav |
| Título Ser./Col.: | Metrología, 50 |
| Autor Inst. Ser./Col.: | Bureau International des Poids et Mesures. BIPM. Paris. FR |
| Idioma: | eng |
| Datos de Edición: | s.l. IOP Publishing. 2013. |
| Pág./Vol.: | 22p. |
| Descriptores: | Metrología; Ácido clorhídrico; Hidrógeno; Cationes; Determinación (química); Incertidumbre; Dispersión |
| Resumen: | This key comparison (KC), CCQM-K73, was performed to demonstrate the capability of the participating National Metrology Institutes (NMIs) to measure the amount content of H+ , νH + , in an HCl solution with a nominal νH + of 0.1 mol·kg-1 . A parallel Pilot Study, CCQM-P19.2, was performed for NMIs that did not desire to participate in the KC. The comparison was a joint activity of the Electrochemical Working Group (EAWG) and Inorganic Analysis Working Group (IAWG) of the CCQM and was coordinated by NIST (USA) and CENAM (México). The method of determination of νH + was left to the individual participant. All participants used either coulometry or titrimetry with potentiometric determination of the endpoint. The agreement of the results was not commensurate with the claimed uncertainties of the subset of participants that claimed small uncertainties for this determination. A workshop on technical issues relating to the CCQM-K73 measurements was conducted at the joint IAWGEAWG meeting at the Bureau International des Poids et Mesures (BIPM), Paris (Sèvres) in April 2010. Several possible sources of bias were investigated, but none could explain the observed dispersion among the participants’ results. In the absence of a specific cause for the dispersion, the IAWG and EAWG decided to assign a Key Comparison Reference Value, KCRV, and standard uncertainty of the KCRV, uKCRV, based on the DerSimonian-Laird statistical estimator. The uKCRV is dominated by the between-laboratory scatter of results in CCQM-K73. The uncertainty estimates from the participants with the lowest reported uncertainties remain unsupported by this KC. |
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URL: |
https://iopscience.iop.org/article/10.1088/0026-1394/50/1A/08001 |
| Tipo de Docum.: | artículo |
| Título: | Report of the key comparison CCQM-K88 : determination of lead in lead-free solder containing silver and copper |
| Autor: | Hioki, Akiharu; Nonose, Naoko; Liandi, Ma; Jingbo, Chao; Liuxing, Feng; Chao, Wei; Cho, Kyung Haeng; Suh, Jung Ki; Min, Hyung Sik; Lim, Youngran; Recknagel, Sebastian; Koenig, Maren; Vogl, Jochen; Caciano de Sena, Rodrigo; dos Reis, Lindomar Augusto; Borinsky, Mónica; Puelles, Mabel; Hatamleh, Nadia; Acosta, Osvaldo; Turk, Gregory; Rabb, Savelas; Sturgeon, Ralph; Methven, Brad; Rienitz, Olaf; Jaehrling, Reinhard; Konopelko, L. A.; Kustikov, Yu. A.; Kozyreva, S. B.; Korzh, A. A. |
| Título Ser./Col.: | Metrología, 50 |
| Autor Inst. Ser./Col.: | Bureau International des Poids et Mesures. BIPM. Paris. FR |
| Idioma: | eng |
| Datos de Edición: | s.l. IOP Publishing. 2013. |
| Pág./Vol.: | 20p. |
| Descriptores: | Metrología; Plomo; Soldadura; Cobre; Plata; Determinación (química); Instrumentos de medición; Espectroscopía; Incertidumbre; Mediciones |
| Resumen: | The CCQM-K88 key comparison was organised by the Inorganic Analysis Working Group of CCQM to test the abilities of the national metrology institutes to measure the mass fraction of lead in lead-free solder containing silver and copper. National Metrology Institute of Japan (NMIJ), National Institute of Metrology P. R. China (NIM) and Korea Research Institute of Standards and Science (KRISS) acted as the coordinating laboratories. The participants used different measurement methods, though most of them used inductively coupled plasma optical emission spectrometry (ICP-OES) or isotope-dilution inductively coupled plasma mass spectrometry (ID-ICP-MS). Accounting for relative expanded uncertainty, comparability of measurement results was successfully demonstrated by the participating NMIs for the measurement of the mass fraction of lead in lead-free solder at the level of 200 mg/kg. It is expected that metals at mass fractions greater than approximately100 mg/kg in lead-free solder containing silver and copper can be determined by each participant using the same technique(s) employed for this key comparison to achieve similar uncertainties mentioned in the present report. |
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URL: |
https://doi.org/10.1088%2F0026-1394%2F50%2F1a%2F08002 |
| Tipo de Docum.: | informe |
| Título: | Key Comparison CCQM-K73 amount content of H+ in hydrochloric acid (0.1 mol·kg-1); Final Report: 26 October 2012 |
| Autor: | Pratt, Kenneth W.. coord.; Ortiz-Aparicio, Jose Luis; Matehuala-Sanchez, Francisco Javier; Pawlina, Monika; Kozłowski, Władysław; Borges, Paulo P.; Silva, Wiler B. da; Borinsky, Mónica B.; Hernandez, Ana; Puelles, Mabel; Hatamleh, Nadia; Acosta, Osvaldo; Nunes, João; Guiomar Lito, M. J.; Camões, M. Filomena; Filipe, Eduarda; Hwang, Euijin; Lim, Youngran; Bing, Wu; Qian, Wang; Chao, Wei; Hioki, Akiharu; Asakai, Toshiaki; Máriássy, Michal; Hanková, Zuzana; Nagibin, Sergey; Manska, Olexandra; Gavrilkin, Vladimir |
| Autor Instit.: | Centro Nacional de Metrología. CENAM. MX; Dansk Fundamental Metrology. DFM. DK; Główny Urząd Miar. GUM. PL; Instituto Nacional de Metrologia, Normalização e Qualidade Industrial. INMETRO. BR; INTI-Química. Buenos Aires. AR; Instituto Português da Qualidade - Scientific and Applied Metrology Unit. IPQ/UMCA-LCM. PT; Korea Research Institute of Standards and Science. KRISS. KR; National Institute of Metrology of P. R. China. NIM. CN; National Institute of Standards and Technology. NIST. US; National Metrology Institute of Japan. NMIJ. JP; Slovenský Metrologický Ústav. SMU. SK; Ukrainian State Research and Production Center of Standardization Metrology, Certification, and Consumers’ Rights Protection. UMTS. UA; All-Russian Scientific Institute for Physical-Technical and Radiological Measurements. VNIIFTRI. RU |
| Idioma: | eng |
| Datos de Edición: | Gaithersburg. US. NIST. 2012. |
| Pág./Vol.: | 22p. |
| Unidad técnica: | INTI-Quimica. |
| Descriptores: | Metrología química; Acido clorhídrico; Hidrógeno; Soluciones ácidas; Métodos de determinación; Mediciones; Incertidumbre; Análisis volumétrico; Homogeneidad; Estabilidad; Trazabilidad; Técnicas estadísticas; Errores; Impurezas |
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